| Impregnated silica nanoparticles for the reactive removal of sulphur mustard from solutions. | |
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MedLine Citation:
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PMID: 18513865 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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High surface area (887.3m(2)/g) silica nanoparticles were synthesized using aerogel route and thereafter, characterized by N(2)-Brunauer-Emmet-Teller (BET), SEM and TEM techniques. The data indicated the formation of nanoparticles of silica in the size range of 24-75 nm with mesoporous characteristics. Later, these were impregnated with reactive chemicals such as N-chloro compounds, oxaziridines, polyoxometalates, etc., which have already been proven to be effective against sulphur mustard (HD). Thus, developed novel mesoporous reactive sorbents were tested for their self-decontaminating feature by conducting studies on kinetics of adsorptive removal of HD from solution. Trichloroisocyanuric acid impregnated silica nanoparticles (10%, w/w)-based system was found to be the best with least half-life value (t(1/2)=2.8 min) among prepared systems to remove and detoxify HD into nontoxic degradation products. Hydrolysis, dehydrohalogenation and oxidation reactions were found to be the route of degradation of HD over prepared sorbents. The study also inferred that 10% loading of impregnants over high surface area and low density silica nanoparticles enhances the rate of reaction kinetics and seems to be useful in the field of heterogeneous reaction kinetics. |
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Authors:
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Beer Singh; Amit Saxena; Anil Kumar Nigam; Kumaran Ganesan; Pratibha Pandey |
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Publication Detail:
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Type: Journal Article Date: 2008-04-24 |
Journal Detail:
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Title: Journal of hazardous materials Volume: 161 ISSN: 0304-3894 ISO Abbreviation: J. Hazard. Mater. Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2008-11-25 Completed Date: 2009-03-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: Netherlands |
Other Details:
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Languages: eng Pagination: 933-40 Citation Subset: IM |
Affiliation:
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PD Division, Defence R&D Establishment, Jhansi Road, Gwalior 474002, MP, India. beerbs5@rediffmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Kinetics Materials Testing Metal Nanoparticles / chemistry* Microscopy, Electron, Scanning Microscopy, Electron, Transmission Mustard Gas / chemistry* Nanotechnology / methods* Oxygen / chemistry Silicon Dioxide / chemistry* Surface Properties Triazines / chemistry Water Purification / methods* X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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0/Triazines; 505-60-2/Mustard Gas; 7631-86-9/Silicon Dioxide; 7782-44-7/Oxygen; 87-90-1/symclosene |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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