Removal of sulphur mustard, sarin and simulants on impregnated silica nanoparticles

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• 作者：Amit Saxena^a ; ^{amsa888@rediffmail.com} ; Avanish K. Srivastava^b ; Beer Singh^b ; ^{beerbs5@rediffmail.com} ; Anshu Goyal^c
• 关键词：Metal oxide nanoparticles ; Impregnation ; Degradation ; Chemical warfare agents
• 刊名：Journal of Hazardous Materials
• 出版年：2012
• 期刊代码：50_03043894
• 类别：ce
• 出版时间：15 April, 2012
• 卷：211-212
• 期：Complete
• 页码：226-232
• 文件大小：1062 K

摘要

Silica nanoparticles of diameter, 24-75 nm and surface area, 875 m²/g were synthesized using aero-gel route. Thereafter, nanoparticles were impregnated with reactive chemicals, and used as reactive adsorbent to study the removal of toxic nerve and blister chemical warfare agents and their simulants from solutions. Trichloroisocyanuric acid impregnated silica nanoparticles showed the best performance and indicated physisorption followed by chemisorption/degradation of toxicants. This indicated their suitability as universal decontaminant for nerve and blister agents. This system showed a decrease in t_1/2 from 1210 to 2.8 min for the removal of king of chemical warfare agents, i.e., sulphur mustard. Hydrolysis, dehydrohalogenation and oxidation reactions were found to be the route of degradation of toxicants over impregnated silica nanoparticles.