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

Abstract

Silica nanoparticles of diameter, 24-75 nm and surface area, 875 m(2)/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.

• Authors: Amit Saxena, Avanish K Srivastava, Beer Singh, Anshu Goyal
• Journal: Journal of hazardous materials (J Hazard Mater) Vol. 211-212 Pg. 226-32 (Apr 15 2012) ISSN: 1873-3336 [Electronic] Netherlands
• PMID: 21871717 (Publication Type: Journal Article)
• Copyright: Copyright © 2011 Elsevier B.V. All rights reserved.

Chemical References

• Chemical Warfare Agents
• Environmental Pollutants
• Triazines
• trichloroisocyanuric acid
• Silicon Dioxide
• Sarin
• Mustard Gas

Topics

• Adsorption
• Chemical Warfare Agents (chemistry)
• Decontamination (methods)
• Environmental Pollutants (chemistry)
• Kinetics
• Microscopy, Electron, Scanning
• Microscopy, Electron, Transmission
• Mustard Gas (chemistry)
• Nanoparticles (chemistry, ultrastructure)
• Porosity
• Sarin (chemistry)
• Silicon Dioxide (chemistry)
• Surface Properties
• Triazines (chemistry)