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Korean Carbon Society (한국탄소학회)
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Breakthrough behaviour of NBC canister against carbon tetrachloride: a simulant for chemical warfare agents

  • Srivastava, Avanish Kumar (Defence Research and Development Establishment) ;
  • Shah, D. (Defence Research and Development Establishment) ;
  • Mahato, T.H. (Defence Research and Development Establishment) ;
  • Singh, Beer (Defence Research and Development Establishment) ;
  • Saxena, A. (Defence Research and Development Establishment) ;
  • Verma, A.K. (Defence Research and Development Establishment) ;
  • Shrivastava, S. (Defence Research and Development Establishment) ;
  • Roy, A. (Defence Research and Development Establishment) ;
  • Yadav, S.S. (Defence Research and Development Establishment) ;
  • Shrivastava, A.R. (Defence Research and Development Establishment)
  • Received : 2012.02.06
  • Accepted : 2012.04.11
  • Published : 2012.04.30
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Abstract

A nuclear, biological, chemical (NBC) canister was indigenously developed using active carbon impregnated with ammoniacal salts of copper (II), chromium (VI) and silver (I), and high efficiency particulate aerosol filter media. The NBC canister was evaluated against carbon tetra chloride ($CCl_4$) vapours, which were used as a simulant for persistent chemical warfare agents under dynamic conditions for testing breakthrough times of canisters of gas masks in the National Approval Test of Respirators. The effects of $CCl_4$ concentration, test flow rate, temperature, and relative humidity (RH) on the breakthrough time of the NBC canister against $CCl_4$ vapour were also studied. The impregnated carbon that filled the NBC canister was characterized for surface area and pore volume by $N_2$ adsorption-desorption isotherm at liquid nitrogen temperature. The study clearly indicated that the NBC canister provides adequate protection against $CCl_4$ vapours. The breakthrough time decreased with the increase of the $CCl_4$ concentration and flow rate. The variation in temperature and RH did not significantly affect the breakthrough behaviour of the NBC canister at high vapour concentration of $CCl_4$, whereas the breakthrough time of the NBC canister was reduced by an increase of RH at low $CCl_4$ vapour concentration.

Keywords

References

  1. Waitt AH. Gas Warfare: the Chemical Weapon, its Use, and Protection Against it. Rev. ed., Duell, Sloan, and Pearce, New York (1944).
  2. Noyes WA. Military Problems with Aerosol and Nonpersistant Gases. Summary Technical Report Division 10, Vol. 1. National Defense Research Committee, Washington, DC (1946).
  3. Singh B, Saxena A, Sharda D, Yadav SS, Pandey CD, Sekhar K. Evaluation of NBC canisters against phosgene-a chemical warfare agent. Def Sci J, 55, 437 (2005). https://doi.org/10.14429/dsj.55.2005
  4. Jonas LA, Rehrmann JA. Predictive equations in gas adsorption kinetics. Carbon, 11, 59 (1973). http://dx.doi.org/10.1016/0008-6223(73)90008-0.
  5. Wood GO, Stampfer JF. Adsorption rate coefficients for gases and vapors on activated carbons. Carbon, 31, 195 (1993). http://dx.doi. org/10.1016/0008-6223(93)90172-7.
  6. Singh B, Madhusudhanan S, Dubey V, Nath R, Rao NBSN. Active carbon for removal of toxic chemicals from contaminated water. Carbon, 34, 327 (1996). http://dx.doi.org/10.1016/0008-6223(95)00179-4.
  7. Wagner GW, Bartram PW. Reactions of the nerve agent simulant diisopropyl fluorophosphate with self-decontaminating adsorbents. A 31P MAS NMR study. J Mol Catal A: Chem, 144, 419 (1999). http://dx.doi.org/10.1016/s1381-1169(98)00343-4.
  8. Singh B, Madhusudanan S, Kumar CGP, Sachan SRS, Pandey SK, Agarwal S. Determination of copper, total chromium and silver in impregnated carbon. Def Sci J, 48, 365 (1998). https://doi.org/10.14429/dsj.48.3963
  9. Barnir Z, Aharoni C. Adsorption of cyanogen chloride on impregnated active carbon. Carbon, 13, 363 (1975). http://dx.doi. org/10.1016/0008-6223(75)90003-2.
  10. Standards for Gas Mask. Ministry of Labour Notification No. 68 of September 26 (1990).
  11. Standards for Gas Mask. Ministry of Labour Notification No. 1 of January 8 (1996).
  12. Srivastava AK, Saxena A, Singh B, Srivas SK. Development and evaluation of impregnated carbon systems against iodine vapours. Carbon Lett, 8, 274 (2007). https://doi.org/10.5714/CL.2007.8.4.274
  13. Cordero T, Rodriguez-Mirasol J, Tancredi N, Piriz J, Vivo G, Rodriguez JJ. Influence of surface composition and pore structure on Cr(III) adsorption onto activated carbons. Ind Eng Chem Res, 41, 6042 (2002). http://dx.doi.org/10.1021/ie020210f.
  14. Ehrburger P, Dentzer J, Lahaye J, Dziedzinl P, Fangeat R. Thermal behavior of chromium trioxide deposited on carbon. Carbon, 28, 113 (1990). http://dx.doi.org/10.1016/0008-6223(90)90101-4.
  15. Nelson GO, Harder CA. Respirator cartridge efficiency studies. 5. Effect of solvent vapor. Am Ind Hyg Assoc J, 35, 391 (1974). http://dx.doi.org/10.1080/0002889748507051.
  16. Moyer ES, Peterson JA. Organic vapor (OV) respirator cartridge and canister testing against methylene chloride. Appl Occup Environ Hyg, 8, 553 (1993). http://dx.doi.org/10.1080/1047322x.1993.10388159.