TY - GEN
T1 - Photocatalytic oxidation of VX-simulation substance
AU - Koslova, E.
AU - Vorontsov, A.
AU - Rima, G.
AU - Lion, C.
AU - Preis, S.
PY - 2007
Y1 - 2007
N2 - Experimental studies of photocatalytic oxidation (PCO) of VX-gas simulation substance cysteamine-S-phosphate sodium salt (NaHPO3S-CH2-CH2-NH2, CPSS) at various initial concentrations and pH were undertaken. PCO ultimately resulted in complete mineralisation of CPSS. The PCO byproducts of CPSS include acetate, oxalate and trace amounts of formate ions. The formation rates of acetate and phosphate were equal to the rate of degradation of CPSS, which indicates easy breakage of P-S, C-S and C-N bonds. Sulphate was formed more slowly due to stepwise oxidation of reduced sulphur. Amino group, generally transformed to ammonia, was partially oxidised to nitrite and nitrate in alkaline media. The fastest mineralisation in terms of both TOC degradation and phosphate formation was observed in neutral media. Under neutral media conditions, the PCO rate increased linearly with the CPSS concentration increase. The maximum efficiency by TOC degradation was observed as large as 77 mg per Wh of incident UV flux with quantum efficiency 3.8%.
AB - Experimental studies of photocatalytic oxidation (PCO) of VX-gas simulation substance cysteamine-S-phosphate sodium salt (NaHPO3S-CH2-CH2-NH2, CPSS) at various initial concentrations and pH were undertaken. PCO ultimately resulted in complete mineralisation of CPSS. The PCO byproducts of CPSS include acetate, oxalate and trace amounts of formate ions. The formation rates of acetate and phosphate were equal to the rate of degradation of CPSS, which indicates easy breakage of P-S, C-S and C-N bonds. Sulphate was formed more slowly due to stepwise oxidation of reduced sulphur. Amino group, generally transformed to ammonia, was partially oxidised to nitrite and nitrate in alkaline media. The fastest mineralisation in terms of both TOC degradation and phosphate formation was observed in neutral media. Under neutral media conditions, the PCO rate increased linearly with the CPSS concentration increase. The maximum efficiency by TOC degradation was observed as large as 77 mg per Wh of incident UV flux with quantum efficiency 3.8%.
KW - Chemical warfare agents
KW - Cysteamine-S-phosphate
KW - Mineralisation
KW - Organsulphurous compounds
KW - VX-gas
UR - https://www.scopus.com/pages/publications/34547702421
U2 - 10.2166/wst.2007.393
DO - 10.2166/wst.2007.393
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C2 - 17674839
AN - SCOPUS:34547702421
SN - 1843395959
SN - 9781843395959
T3 - Water Science and Technology
SP - 133
EP - 138
BT - Oxidation Technologies for Water and Wastewater Treatment IV - Selected Papers of the 4th International Conference on Oxidation Technologies for Water and Wastewater Treatment
A2 - Vogelpohl, Alfons
A2 - Sievers, Michael
A2 - Geiben, Sven-Uwe
ER -