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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bal, K. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
New ways to bridge the gap between microscopic simulations and macroscopic chemistry |
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Doctoral thesis |
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Year |
2018 |
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Doctoral thesis; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
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Antwerpen |
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Most recent IF: NA |
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Call Number |
UA @ lucian @ c:irua:154836 |
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5118 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Balashova, I.O.; Tolbin, A.Y.; Tarakanov, P.A.; Krot, A.R.; Fedorova, K., V; Sergeeva, I.A.; Trashin, S.A.; De Wael, K.; Pushkarev, V.E.; Koifman, M.O.; Ponomarev, G., V. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
A covalently linked dyad based on zinc phthalocyanine and methylpheophorbide α : synthetic and physicochemical study |
Type |
A1 Journal article |
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Year |
2021 |
Publication |
Macroheterocycles |
Abbreviated Journal |
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Volume |
14 |
Issue |
1 |
Pages |
40-50 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
The first covalently linked conjugate of metal phthalocyaninate and chlorin e(6) derivative has been obtained by transesterification of alpha-ketomethyl ester in methylpheophorbide a with zinc(II) 2-(2-hydroxymethylbenzyloxy)-9(10),16(17),23(24)-tri-tert-butylphthalocyaninate under mild conditions. The dyad exhibits a panchromatic nature revealing both the phthalocyanine and pheophorbide derived bands in the UV-Vis absorption spectrum. The H-1 NMR spectroscopy data combined with theoretical calculations indicate the presence of spatial intramolecular interactions between the phthalocyanine, pheophorbide and spacer fragments of the dyad allowing to forecast its enhanced nonlinear optical properties, as well as the characteristic energy transfer from the excited pheophorbide subunit to the phthalocyanine core. Indeed, when excited in the UV-Vis range, the conjugate shows red fluorescence with the spectral maximum at 686 nm, which is close to the one of the initial zinc phthalocyaninate. Furthermore, the dyad effectively generates singlet oxygen and, in the presence of polyvinylpyrrolidone (PVP) as biocompatible solubilizer, forms stable micellar saline solutions with the particles ranged in size between 40 and 100 nm. These nanoparticles represent promising third-generation photosensitizing systems for application in theranostics. |
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000659682000003 |
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2021-06-25 |
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UA library record; WoS full record |
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OpenAccess |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:179196 |
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7386 |
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Balemans, S.; Vlaeminck, S.E.; Torfs, E.; Hartog, L.; Zaharova, L.; Rehman, U.; Nopens, I. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
The impact of local hydrodynamics on high-rate activated sludge flocculation in laboratory and full-scale reactors |
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A1 Journal article |
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Year |
2020 |
Publication |
Processes |
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8 |
Issue |
2 |
Pages |
131-18 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
High rate activated sludge (HRAS) processes have a high potential for carbon and energy recovery from sewage, yet they suffer frequently from poor settleability due to flocculation issues. The process of flocculation is generally optimized using jar tests. However, detailed jar hydrodynamics are often unknown, and average quantities are used, which can significantly differ from the local conditions. The presented work combined experimental and numerical data to investigate the impact of local hydrodynamics on HRAS flocculation for two different jar test configurations (i.e., radial vs. axial impellers at different impeller velocities) and compared the hydrodynamics in these jar tests to those in a representative section of a full scale reactor using computational fluid dynamics (CFD). The analysis showed that the flocculation performance was highly influenced by the impeller type and its speed. The axial impeller appeared to be more appropriate for floc formation over a range of impeller speeds as it produced a more homogeneous distribution of local velocity gradients compared to the radial impeller. In contrast, the radial impeller generated larger volumes (%) of high velocity gradients in which floc breakage may occur. Comparison to local velocity gradients in a full scale system showed that also here, high velocity gradients occurred in the region around the impeller, which might significantly hamper the HRAS flocculation process. As such, this study showed that a model based approach was necessary to translate lab scale results to full scale. These new insights can help improve future experimental setups and reactor design for improved HRAS flocculation. |
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000521167900088 |
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2020-01-24 |
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2227-9717 |
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UA library record; WoS full record; WoS citing articles |
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; This research was funded by Research Foundation Flanders (FWO SB Grant 1.S.705.18N). ; |
Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:165420 |
Serial |
6543 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Baltas, H.; Čevik, U. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Variation of K X-ray fluorescence cross-sections of Cu, Y and Ba in YBa2Cu3O7-\delta superconductor |
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A1 Journal article |
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Year |
2009 |
Publication |
Solid state communications |
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149 |
Issue |
5/6 |
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231-235 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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K X-ray fluorescence cross-sections of Cu, Y and Ba elements were measured in CuO, Y(2)O(3), BaCO(3) Compounds and YBa(2)Cu(3)O(7-delta) superconductor samples (nonreacted agent, calcined and sintered states). A superconductor sample of YBa(2)Cu(3)O(7-delta) was prepared by using a solid-state reaction technique. The samples were excited by gamma rays of energy 59.5 keV from a (241)Am radioisotope source. The Cu, Y and Ba K X-ray intensities counted with a Si(Li) detector were measured in different solid-state conditions. The obtained values of K X-ray fluorescence cross-section were compared with the theoretical values of pure Cu, Y and Ba elements. We found that the K X-ray fluorescence cross-section of Cu, Y and Ba in YBa(2)Cu(3)O(7-delta) sample is changed in different solid-state conditions, depending on the mixture (nonreacted agent), calcined and sintered states. (c) 2008 Elsevier Ltd. All rights reserved. |
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000262795900013 |
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2008-11-21 |
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0038-1098 |
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UA library record; WoS full record; WoS citing articles |
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no |
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Call Number |
UA @ admin @ c:irua:94568 |
Serial |
8735 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Balzuweit, K.; Meekes, H.; Van Tendeloo, G.; de Boer, J.L. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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On the relationship between morphology, composition and structure of Al-Cu-Fe crystals and quasicrystals |
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A1 Journal article |
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Year |
1993 |
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Philosophical magazine: B: physics of condensed matter: electronic, optical and magnetic properties |
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67 |
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4 |
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513-532 |
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A1 Journal article; Electron microscopy for materials research (EMAT) |
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London |
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A1993LA91100005 |
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2007-07-08 |
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1364-2812;1463-6417; |
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UA library record; WoS full record; WoS citing articles |
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Times cited |
10 |
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Approved |
COMPUTER SCIENCE, INTERDISCIPLINARY 11/104 Q1 # PHYSICS, MATHEMATICAL 1/53 Q1 # |
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Call Number |
UA @ lucian @ c:irua:6828 |
Serial |
2451 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Barbiellini, B.; Kuriplach, J.; Saniz, R. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Study of rechargeable batteries using advanced spectroscopic and computational techniques |
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Editorial |
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2021 |
Publication |
Condensed Matter |
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6 |
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3 |
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26 |
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Editorial; Electron microscopy for materials research (EMAT) |
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Abstract |
Improving the efficiency and longevity of energy storage systems based on Li- and Na-ion rechargeable batteries presents a major challenge. The main problems are essentially capacity loss and limited cyclability. These effects are due to a hierarchy of factors spanning various length and time scales, interconnected in a complex manner. As a consequence, and in spite of several decades of research, a proper understanding of the ageing process has remained somewhat elusive. In recent years, however, combinations of advanced spectroscopy techniques and first-principles simulations have been applied with success to tackle this problem. In this Special Issue, we are pleased to present a selection of articles that, by precisely applying these methods, unravel key aspects of the reduction-oxidation reaction and intercalation processes. Furthermore, the approaches presented provide improvements to standard diagnostic and characterisation techniques, enabling the detection of possible Li-ion flow bottlenecks causing the degradation of capacity and cyclability. |
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000699368400001 |
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2021-07-26 |
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2410-3896 |
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UA library record; WoS full record; WoS citing articles |
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Open Access |
OpenAccess |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:181630 |
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6890 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Barnes, D.J.; Nicholas, R.J.; Watts, M.; Peeters, F.M.; Wu, X.G.; Devreese, J.T.; Langerak, C.J.; Singleton, J.; Harris, J.J.; Foxon, C.T. |
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Optically detected magnetophonon resonance in GaAs-GaAlAs heterojunctions |
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P3 Proceeding |
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1991 |
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P3 Proceeding; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
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Springer |
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Berlin |
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0000-00-00 |
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PHYSICS, APPLIED 47/145 Q2 # |
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Call Number |
UA @ lucian @ c:irua:961 |
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2478 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Beames, A.; Broekx, S.; Heijungs, R.; Lookman, R.; Boonen, K.; Van Geert, Y.; Dendoncker, K.; Seuntjens, P. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Accounting for land-use efficiency and temporal variations between brownfield remediation alternatives in life-cycle assessment |
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A1 Journal article |
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Year |
2015 |
Publication |
Journal of cleaner production |
Abbreviated Journal |
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Volume |
101 |
Issue |
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Pages |
109-117 |
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A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
The latest life-cycle assessment methods account for land use, due to the production, use and disposal of products and services, in terms of ecosystem damage. The process of brownfield remediation converts otherwise idle urban space into productive space. The value to ecosystems in this context is of course limited since the brownfield site remains urban. When evaluating brownfield remediation technologies, the availability of space on-site is dependent on the duration of time required by the remediation technology to reach the remediation target. Remediation technology alternatives tend to vary largely in terms of duration. Comparative life-cycle assessments of remediation technologies, to date, present the large variations between alternatives in terms of remediation duration but do not translate this into an impact or parameter. The restored subsurface zone is often defined as a functional unit, when in fact the surface area is the resource restored by the remediation service. The economic benefits of making land resources available are particularly important considerations in the context of brownfield remediation. The research proposes an innovative impact assessment approach that allows land to be considered as a finite resource. The method is applied in a comparative life-cycle assessment of two potential remediation scenarios for an idle brownfield in the Brussels region of Belgium. The results show that there is a trade-off between greenhouse gas emissions and land availability and that both are largely dependent on the efficiency of the contaminant extraction mechanism. The results also raise the question as to whether the economic valuation of land, like precious metals and fossil fuels, provides an accurate reflection of the true value of the resource. Considering land as a resource at the midpoint level is also relevant in other urban contexts where competition exists between different land-uses, where urban sprawl is detrimental to undeveloped areas and where urban intensification is a policy objective. (C) 2015 Elsevier Ltd. All rights reserved. |
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000356988200010 |
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2015-04-05 |
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0959-6526 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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no |
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Call Number |
UA @ admin @ c:irua:127010 |
Serial |
7412 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Beames, A.; Broekx, S.; Lookman, R.; Touchant, K.; Seuntjens, P. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Sustainability appraisal tools for soil and groundwater remediation : how is the choice of remediation alternative influenced by different sets of sustainability indicators and tool structures? |
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A1 Journal article |
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Year |
2014 |
Publication |
The science of the total environment |
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470 |
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Pages |
954-966 |
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A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
The state-of-the-science in sustainability assessment of soil and groundwater remediation is evaluated with the application of four decision support systems (DSSs) to a large-scale brownfield revitalization case study. The DSSs were used to perform sustainability appraisals of four technically feasible remediation alternatives proposed for the site. The first stage of the review compares the scope of each tool's sustainability indicators, how these indicators are measured and how the tools differ in terms of standardization and weighting procedures. The second stage of the review compares the outputs from the tools and determines the key factors that result in differing results between tools. The evaluation of indicator sets and tool structures explains why the tools generate differing results. Not all crucial impact areas, as identified by sustainable remediation forums, are thoroughly considered by the tools, particularly with regard to the social and economic aspects of sustainability. Variations in boundary conditions defined between technologies, produce distorted environmental impact results, especially when in-situ and ex-situ technologies are compared. The review draws attention to the need for end users to be aware of which aspects of sustainability are considered, how the aspects are measured and how all aspects are ultimately balanced in the evaluation of potential remediation strategies. Existing tools can be improved by considering different technologies within the same boundary conditions and by expanding indicator sets to include indicators deemed to be relevant by remediation forums. (C) 2013 Elsevier B.V. All rights reserved. |
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000331415600102 |
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2013-11-14 |
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0048-9697; 1879-1026 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Open Access |
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no |
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Call Number |
UA @ admin @ c:irua:115827 |
Serial |
8628 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Beckwee, E.J.; Watson, G.; Houlleberghs, M.; Arenas Esteban, D.; Bals, S.; Van Der Voort, P.; Breynaert, E.; Martens, J.; Baron, G.V.; Denayer, J.F.M. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Enabling hydrate-based methane storage under mild operating conditions by periodic mesoporous organosilica nanotubes |
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A1 Journal article |
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Year |
2023 |
Publication |
Heliyon |
Abbreviated Journal |
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Volume |
9 |
Issue |
7 |
Pages |
e17662-14 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
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Abstract |
Biomethane is a renewable natural gas substitute produced from biogas. Storage of this sustainable energy vector in confined clathrate hydrates, encapsulated in the pores of a host material, is a highly promising avenue to improve storage capacity and energy efficiency. Herein, a new type of periodic mesoporous organosilica (PMO) nanotubes, referred to as hollow ring PMO (HR-PMO), capable of promoting methane clathrate hydrate formation under mild working conditions (273 K, 3.5 MPa) and at high water loading (5.1 g water/g HR-PMO) is reported. Gravimetric uptake measurements reveal a steep single-stepped isotherm and a noticeably high methane storage capacity (0.55 g methane/g HR-PMO; 0.11 g methane/g water at 3.5 MPa). The large working capacity throughout consecutive pressure-induced clathrate hydrate formationdissociation cycles demonstrates the material's excellent recyclability (97% preservation of capacity). Supported by ex situ cryo-electron tomography and x-ray diffraction, HR-PMO nanotubes are hypothesized to promote clathrate hydrate nucleation and growth by distribution and confinement of water in the mesopores of their outer wall, along the central channels of the nanotubes and on the external nanotube surface. These findings showcase the potential for application of organosilica materials with hierarchical and interconnected pore systems for pressure-based storage of biomethane in confined clathrate hydrates. |
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Wos |
001056264100001 |
Publication Date |
2023-06-28 |
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Edition |
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ISSN |
2405-8440 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Times cited |
4 |
Open Access |
OpenAccess |
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Notes |
E.J.B., G.W. and M.H. contributed equally to this work. M.H. acknowledges FWO for an FWO-SB fellowship. All authors acknowledge VLAIO for Moonshot funding (ARCLATH, n ? HBC.2019.0110, ARCLATH2, n ? HBC.2021.0254) . J.A.M. acknowledges the Flemish Government for long-term structural funding (Methusalem) and department EWI for infrastructure investment via the Hermes Fund (AH.2016.134) . NMRCoRe acknowledges the Flemish government, department EWI for financial support as International Research Infrastructure (I001321N: Nuclear Magnetic Resonance Spectroscopy Platform for Molecular Water Research) . J.A.M. acknowledges the European Research Council (ERC) for an Advanced Research Grant under the European Union's Horizon 2020 research and innovation program under grant agreement No. 834134 (WATUSO) . S.B acknowledges financial support by the Research Foundation Flanders (FWO grant G.0381.16N) . This project also received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 731019 (EUSMI) and No 815128 (REALNANO) . |
Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:199249 |
Serial |
8862 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bekaert, J. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Ab initio description of multicomponent superconductivity in bulk to atomically thin materials |
Type |
Doctoral thesis |
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Year |
2018 |
Publication |
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Abbreviated Journal |
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Volume |
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Keywords |
Doctoral thesis; Condensed Matter Theory (CMT) |
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Antwerpen |
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Open Access |
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Most recent IF: NA |
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Call Number |
UA @ lucian @ c:irua:151304 |
Serial |
4961 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bekaert, J. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Ab initio description of multicomponent superconductivity in bulk to atomically thin materials |
Type |
Doctoral thesis |
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Year |
2018 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
290 p. |
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Keywords |
Doctoral thesis; Condensed Matter Theory (CMT) |
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UA library record |
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Open Access |
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Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:151304 |
Serial |
5192 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bekshaev, A.; de Hoog, J.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Grazing-emission electron probe microanalysis of particles near the substrate edge |
Type |
A1 Journal article |
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Year |
2001 |
Publication |
Spectrochimica acta: part B : atomic spectroscopy |
Abbreviated Journal |
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Volume |
56 |
Issue |
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Pages |
2385-2395 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Corporate Author |
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Wos |
000173118900005 |
Publication Date |
2002-07-25 |
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Abbreviated Series Title |
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Series Volume |
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Edition |
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ISSN |
0584-8547; 1873-3565 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:36384 |
Serial |
8007 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bekshaev, A.; Kontush, S.; Popov, A.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Application of light beams with non-zero angular momentum in optical study of micrometer-size aerosol particles |
Type |
P1 Proceeding |
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Year |
2001 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
288-296
T2 - Second International Conference on Si |
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Keywords |
P1 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Corporate Author |
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Place of Publication |
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Wos |
000171469300037 |
Publication Date |
2003-11-19 |
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Abbreviated Series Title |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:36386 |
Serial |
7479 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bekshaev, A.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Interference technique in grazing-emission electron probe microanalysis of submicrometer particles |
Type |
A1 Journal article |
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Year |
2001 |
Publication |
Spectrochimica acta: part B : atomic spectroscopy |
Abbreviated Journal |
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Volume |
56 |
Issue |
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Pages |
503-515 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Wos |
000169972200003 |
Publication Date |
2002-07-25 |
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Abbreviated Series Title |
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Edition |
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ISSN |
0584-8547; 1873-3565 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:36083 |
Serial |
8115 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bekshaev, A.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Substrates with a periodic surface structure in grazing-exit X-ray microanalysis |
Type |
A1 Journal article |
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Year |
2002 |
Publication |
Spectrochimica acta: part B : atomic spectroscopy |
Abbreviated Journal |
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Volume |
57 |
Issue |
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Pages |
865-882 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Wos |
000177033500005 |
Publication Date |
2003-02-28 |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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ISSN |
0584-8547; 1873-3565 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:39516 |
Serial |
8615 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Belik, A.A.; Morozov, V.A.; Deyneko, D.V.; Savon, A.E.; Baryshnikova, O.V.; Zhukovskaya, E.S.; Dorbakov, N.G.; Katsuya, Y.; Tanaka, M.; Stefanovich, S.Y.; Hadermann, J.; Lazoryak, B.I. |
![goto web page url](http://nano.uantwerpen.be/nanorefs/img/www.gif)
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Antiferroelectric properties and site occupations ofR3+ cations in Ca8MgR(PO4)7 luminescent host materials |
Type |
A1 Journal article |
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Year |
2017 |
Publication |
Journal of alloys and compounds |
Abbreviated Journal |
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Volume |
699 |
Issue |
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Pages |
928-937 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
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Abstract |
Ca8MgR(PO4)(7) = La, Pr, Nd, Sm-Lu, and Y) phosphates with a beta-Ca-3(PO4)(2) related structure were prepared by a standard solid-state method in air. Second-harmonic generation, differential scanning calorimetry, and dielectric measurements led to the conclusion that all Ca8MgR(PO4)(7) are centrosymmetric and go to another centrosymmetric phase in the course of a first-order antiferroelectric phase transition well above room temperature (RT). High-temperature electron diffraction showed that the symmetry changes from R (3) over barc to R (3) over barm during the phase transition. Structures of Ca8MgR(PO4)(7) at RT were refined by the Rietveld method in centrosymmetric space group R (3) over barc. Mg2+ cations occupy the M5 site; the occupancy of the M1 site by R3+ cations increases monotonically from 0.0389 for R = La to 0.1667 for R = Er-Lu, whereas the occupancy of the M3 site by R3+ cations decreases monotonically from 0.1278 for R = La to 0 for R = Er-Lu. In the case of R = Er-Lu, the M3 site is occupied only by Ca2+ cations. P1O(4) tetrahedra and cations at the M3 site are disordered in the R (3) over barc structure of Ca8MgEu(PO4)(7). Using synchrotron X-ray powder diffraction, we found that annealing conditions do not significantly affect the distribution of Ca2+ and Eu3+ cations between the structure positions of Ca8MgEu(PO4)(7). Luminescent properties of CasMgEu(PO4)(7) powder samples were investigated under near-ultraviolet (n-UV) light. Excitation spectra of CasMgEu(PO4)(7) show the strongest absorption at about 395 nm that matches with commercially available n-UV-emitting GaN-based LED chips. Emission spectra show an intense red emission due to the D-5(0) -> F-7(2) transition of Eu3+. (C) 2016 Elsevier B.V. All rights reserved. |
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000393727500129 |
Publication Date |
2016-12-24 |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0925-8388 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:152665 |
Serial |
7464 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Belikov, K.N.; Mikhailova, L.I.; Spolnik, Z.M.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
EDXRF determination of impurities in potassium dihydrogenphosphate single crystals and raw materials |
Type |
A1 Journal article |
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Year |
2006 |
Publication |
X-ray spectrometry |
Abbreviated Journal |
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Volume |
35 |
Issue |
2 |
Pages |
112-115 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Wos |
000236405500005 |
Publication Date |
2005-10-14 |
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Abbreviated Series Title |
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Edition |
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ISSN |
0049-8246 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:56727 |
Serial |
7835 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Belmans, F.; Van Grieken, R.; Brügmann, L. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Geochemical characterization of recent sediments in the Baltic Sea by bulk and electron microprobe analysis |
Type |
A1 Journal article |
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Year |
1993 |
Publication |
Marine chemistry |
Abbreviated Journal |
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Volume |
42 |
Issue |
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Pages |
223-236 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Wos |
A1993LK11300006 |
Publication Date |
2003-08-08 |
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Abbreviated Series Title |
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ISSN |
0304-4203; 1872-7581 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:6255 |
Serial |
7994 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Belov, I. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Plasma-assisted conversion of carbon dioxide |
Type |
Doctoral thesis |
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Year |
2017 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
Doctoral thesis; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
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Additional Links |
UA library record |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:146275 |
Serial |
8387 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bencs, L. |
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Title |
Calculation of the spectral line profile broadening parameter in graphite furnace atomic absorption spectrometry |
Type |
A1 Journal article |
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Year |
2008 |
Publication |
Canadian Journal Of Analytical Sciences And Spectroscopy |
Abbreviated Journal |
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Volume |
53 |
Issue |
2 |
Pages |
52-58 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
A polynomial approach is applied for a number of data from the Posener-tables to calculate the values of the intensity distribution function of atomic absorption lines – H(a, 0.726a) – at the tabulated damping-parameter values with an error not worse than 0.044 %. For the resultant H(a, 0.726a) data, the ninth and sixth order polynomials can be fitted according to the damping parameter range of 0-2, and 2-10, respectively, which results in a minimal error of approximation. The derived functions are simply applicable to the calculation of any H(a, 0.726a) value belonging to a damping-parameter of any arbitrarily selected spectral line, implying the influence of Doppler- and Lorentz-broadening. The overall error of the described method is lower than 0.4 %. |
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Wos |
000260130600002 |
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Abbreviated Series Title |
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Edition |
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ISSN |
1205-6685 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:103094 |
Serial |
7571 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bencs, L.; Horemans, B.; Buczyńska, A.J.; Deutsch, F.; Degraeuwe, B.; Van Poppel, M.; Van Grieken, R. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Seasonality of ship emission related atmospheric pollution over coastal and open waters of the North Sea |
Type |
A1 Journal article |
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Year |
2020 |
Publication |
Atmospheric Environment: X |
Abbreviated Journal |
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Volume |
7 |
Issue |
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Pages |
100077-11 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
The seasonal changes of a large set of atmospheric pollutants (i.e., gases, water-soluble aerosols, metallic/elemental components and black carbon (BC) content) have been studied over the southern bight of the North Sea (the Belgian Continental Shelf) and the English Channel during several marine sampling campaigns, carried out in 2010-2011. A coastal research station at De Haan, Belgium was concurrently used as a background air monitoring site. Size-segregated aerosols (PM1, PM2.5-1, PM10-2.5) were analyzed for particulate mass, elemental content and water-soluble (ionic) compounds, while the equivalent BC content in PM10 was monitored with an Aethalometer. The results clearly demonstrated that the aerosols originating from ship exhaust emissions contributed mostly to fine fraction (PM1), and to a lesser extent to medium-sized fraction (PM2.5-1), whereas components of sea spray and of mineral/soil origin were dominating in the medium-size and coarse aerosol fractions. Looking at seasonal differences, more ship emission related components occurred in the fine and medium-sized PM during winter. Mineral aerosol components were more apparent in coarse PM and especially during the cold season, increased levels were noted. Similarly, higher concentrations of marine fine PM were found during winter, likely due to more extensive ship emissions and/or calm weather conditions. Gaseous pollutants (e.g., HNO2, HNO3, HCl, SO2, NH3) originating from exhaust fumes of ocean-going ships mostly reached the maximum levels in the cold season as well, thus supporting the more intense formation of secondary aerosols. The seasonal trends of total (inorganic) ionic species sampled on the open sea and at the coastal station were usually similar to those of the corresponding PM masses, peaking in the cold season. Sea salt bound fine sulfate and nitrate peaked in spring or the cold season for marine areas, whereas for the coastal site they clearly reached the maximum in the cold season. Ammonium-bound nitrates and sulfates in each PM fraction reached their peak air levels in the cold season over marine sites. Similar seasonal trends could be observed for the coastal station. The general tendency of aerosol distribution over the study areas was independent of the sampling site: the higher the aerosol mass on the open sea with ship traffic, the higher the suspended particulate mass sampled at the coast. |
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Wos |
000571429900007 |
Publication Date |
2020-05-14 |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2590-1621 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Notes |
; The participating researchers of this study gratefully acknowledge the funding from the Belgian Science Policy Office (BELSPO) under the SHIPFLUX project (assignation No.: SD/NS/07A). The researchers thank Jan Van Loock (UA), Andr.e Cattrijsse (VLIZ) and Frank Broucke (VLIZ) for their help with the logistics, sampling and organization of the field/marine studies and Francisco (Tjess) Hernandez (VLIZ) for his help in getting access to the weather data. The participants also want to express their sincere thanks to the crew of R/V Belgica for their help and cooperation in the marine expeditions. ; |
Approved |
Most recent IF: NA |
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|
Call Number |
UA @ admin @ c:irua:171924 |
Serial |
6599 |
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Permanent link to this record |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bencs, L.; Horemans, B.; Buczyńska, A.J.; Van Grieken, R. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Uneven distribution of inorganic pollutants in marine air originating from ocean-going ships |
Type |
A1 Journal article |
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Year |
2017 |
Publication |
Environmental pollution |
Abbreviated Journal |
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Volume |
222 |
Issue |
|
Pages |
226-233 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
The distribution of mass, water-soluble inorganic salts and mineral elements of size-segregated aerosols (PM1, PM2.5-1 and PM10-2.5), precursor gaseous pollutants, black carbon, and nanoparticles (10-300 nm size range) at the Southern Bight of the North Sea has been studied. The concentrations of air pollutants peaked over shipping lanes, open-water anchorage areas and frequently navigated waters, due to the presence of mobile emission sources. A considerable decrease in air pollutant levels was seen when diverting from these marine areas towards remote or coastal banks. These findings showed the rapid dispersion of pollutants in the marine air. The nano-aerosol count, originating from ocean-going ships, peaked at lower average aerodynamic diameters (e.g., approximate to 28 nm) than those, observed from low displacement vessels (45-50 nm, e.g., for fishing boats). The average diameter of nano-PM depended also on weather conditions, e.g., it was higher (approximate to 50 nm) in air of higher humidity. (C) 2016 Elsevier Ltd. All rights reserved. |
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000395360900028 |
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2017-01-06 |
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0269-7491; 1873-6424 |
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Call Number |
UA @ admin @ c:irua:142516 |
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8710 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bencs, L.; Horemans, B.; Van Grieken, R.; et al. |
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Title |
Atmospheric deposition fluxes to the Belgian marine waters originating from ship emissions : SHIPFLUX : final report |
Type |
Minutes and reports |
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Year |
2012 |
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Minutes and reports; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Call Number |
UA @ admin @ c:irua:107883 |
Serial |
7524 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bencs, L.; Krata, A.; Horemans, B.; Buczyńska, A.J.; Dirtu, A.C.; Godoi, A.F.L.; Godoi, R.H.M.; Potgieter-Vermaak, S.; Van Grieken, R. |
![goto web page (via DOI) doi](http://nano.uantwerpen.be/nanorefs/img/doi.gif)
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Title |
Atmospheric nitrogen fluxes at the Belgian coast: 2004-2006 |
Type |
A1 Journal article |
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Year |
2009 |
Publication |
Atmospheric environment : an international journal |
Abbreviated Journal |
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Volume |
43 |
Issue |
24 |
Pages |
3786-3798 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
Daily and seasonal variations in dry and wet atmospheric nitrogen fluxes have been studied during four campaigns between 2004 and 2006 at a coastal site of the Southern North Sea at De Haan (Belgium) located at coordinates of 51.1723° N and 3.0369° E. Concentrations of inorganic N-compounds were determined in the gaseous phase, size-segregated aerosol (coarse, medium, and fine), and rainwater samples. Dissolved organic nitrogen (DON) was quantified in rainwater. The daily variations in N-fluxes of compounds were evaluated with air-mass backward trajectories, classified into the main air-masses arriving at the sampling site (i.e., continental, North Sea, and Atlantic/UK/Channel). The three, non-episodic campaigns showed broadly consistent fluxes, but during the late summer campaign exceptionally high episodic N-deposition was observed. The average dry and wet fluxes for non-episodic campaigns amounted to 2.6 and 4.0 mg N m−2 d−1, respectively, whereas during the episodic late summer period these fluxes were as high as 5.2 and 6.2 mg N m−2 d−1, respectively. Non-episodic seasons/campaigns experienced average aerosol fluxes of 0.91.4 mg N m−2 d−1. Generally, the contribution of aerosol NH4+ was more significant in the medium and fine particulate fractions than that of aerosol NO3−, whereas the latter contributed more in the coarse fraction, especially in continental air-masses. During the dry mid-summer campaign, the DON contributed considerably (15%) to the total N-budget. Exceptionally high episodic aerosol-N inputs have been observed for the late summer campaign, with especially high deposition rates of 3.6 and 2.9 mg N m−2 d−1 for Atlantic/UK/Channel and North Sea-continental (mixed) air-masses, respectively. During this pollution episode, the flux of NH4+ was dominating in each aerosol fraction/air-mass, except for coarse continental aerosols. High deposition of gaseous-N was also observed in this campaign with an average total N-flux of 22.5-times higher than in other campaigns. |
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Wos |
000268609000015 |
Publication Date |
2009-04-17 |
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Edition |
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ISSN |
1352-2310 |
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UA library record; WoS full record; WoS citing articles |
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Call Number |
UA @ admin @ c:irua:77255 |
Serial |
7527 |
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Author ![sorted by Author field, ascending order (up)](img/sort_asc.gif) |
Bencs, L.; Ravindra, K.; de Hoog, J.; Rasoazanany, E.O.; Deutsch, F.; Bleux, N.; Berghmans, P.; Roekens, E.; Krata, A.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Mass and ionic composition of atmospheric fine particles over Belgium and their relation with gaseous air pollutants |
Type |
A1 Journal article |
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Year |
2008 |
Publication |
Journal of environmental monitoring |
Abbreviated Journal |
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Volume |
10 |
Issue |
10 |
Pages |
1148-1157 |
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Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
Mass, major ionic components (MICs) of PM2.5, and related gaseous pollutants (SO2, NOx, NH3, HNO2, and HNO3) were monitored over six locations of different anthropogenic influence (industrial, urban, suburban, and rural) in Belgium. SO42-, NO3-, NH4+, and Na+ were the primary ions of PM2.5 with averages diurnal concentrations ranging from 0.44.5, 0.37.6, 0.94.9, and 0.41.2 µg m-3, respectively. MICs formed 39% of PM2.5 on an average, but it could reach up to 8098%. The SO2, NO, NO2, HNO2, and HNO3 levels showed high seasonal and site-specific fluctuations. The NH3 levels were similar over all the sites (26 µg m-3), indicating its relation to the evenly distributed animal husbandry activities. The sulfur and nitrogen oxidation ratios for PM2.5 point towards a low-to-moderate formation of secondary sulfate and nitrate aerosols over five cities/towns, but their fairly intensive formation over the rural Wingene. Cluster analysis revealed the association of three groups of compounds in PM2.5: (i) NH4NO3, KNO3; (ii) Na2SO4; and (iii) MgCl2, CaCl2, MgF2, CaF2, corresponding to anthropogenic, sea-salt, and mixed (sea-salt + anthropogenic) aerosols, respectively. The neutralization and cation-to-anion ratios indicate that MICs of PM2.5 appeared mostly as (NH4)2SO4 and NH4NO3 salts. Sea-salt input was maximal during winter reaching up to 12% of PM2.5. The overall average Cl-loss for sea-salt particles of PM2.5 at the six sites varied between 69 and 96% with an average of 87%. Principal component analysis revealed vehicular emission, coal/wood burning and animal farming as the dominating sources for the ionic components of PM2.5. |
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000259890100005 |
Publication Date |
2008-10-21 |
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ISSN |
1464-0325; 1464-0333 |
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UA library record; WoS full record; WoS citing articles |
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Call Number |
UA @ admin @ c:irua:76876 |
Serial |
8206 |
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Bencs, L.; Ravindra, K.; de Hoog, J.; Spolnik, Z.; Bleux, N.; Berghmans, P.; Deutsch, F.; Roekens, E.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Appraisal of measurement methods, chemical composition and sources of fine atmospheric particles over six different areas of Northern Belgium |
Type |
A1 Journal article |
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2010 |
Publication |
Environmental pollution |
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158 |
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11 |
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3421-3430 |
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A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Daily and seasonal variation in the total elemental, organic carbon (OC) and elemental carbon (EC) content and mass of PM2.5 were studied at industrial, urban, suburban and agricultural/rural areas. Continuous (optical Dustscan, standard tapered element oscillating micro-balance (TEOM), TEOM with filter dynamics measurement system), semi-continuous (Partisol filter-sampling) and non-continuous (Dekati-impactor sampling and gravimetry) methods of PM2.5 mass monitoring were critically evaluated. The average elemental fraction accounted for 26% of the PM2.5 mass measured by gravimetry. Metals, like K, Mn, Fe, Cu, Zn and Pb were strongly inter-correlated, also frequently with non-metallic elements (P, S, Cl and/or Br) and EC/OC. A high OC/EC ratio (29) was generally observed. The total carbon content of PM2.5 ranged between 3 and 77% (averages: 1232%), peaking near industrial/heavy trafficked sites. Principal component analysis identified heavy oil burning, ferrous/non-ferrous industry and vehicular emissions as the main sources of metal pollution. This work compares various aerosol monitoring methods to characterize PM2.5 over six locations of different anthropogenic activities over Northern Belgium. |
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000282563200009 |
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2010-08-23 |
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0269-7491; 1873-6424 |
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Call Number |
UA @ admin @ c:irua:84237 |
Serial |
7488 |
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Bencs, L.; Ravindra, K.; Van Grieken, R. |
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Determination of ultra-trace levels of palladium in environenmental samples by graphite furnace atomic spectrometry techniques |
Type |
H3 Book chapter |
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2006 |
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173-189
T2 - Palladium emissions in the environmen |
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H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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UA @ admin @ c:irua:54921 |
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7795 |
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Bencs, L.; Ravindra, K.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Methods for the determination of platinum group elements originating from the abrasion of automotive catalytic converters |
Type |
A1 Journal article |
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2003 |
Publication |
Spectrochimica acta: part B : atomic spectroscopy |
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58 |
Issue |
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1723-1755 |
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A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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000186471700001 |
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2003-10-25 |
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0584-8547; 1873-3565 |
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UA library record; WoS full record; WoS citing articles |
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UA @ admin @ c:irua:43520 |
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8225 |
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Bencs, L.; Ravindra, K.; Van Grieken, R. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Platinum : environmental pollution and health effects |
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H2 Book chapter |
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2011 |
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580-595
T2 - Encyclopedia of environmental health |
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H2 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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978-0-444-52273-3 |
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UA @ admin @ c:irua:93109 |
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8390 |
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