Photocatalytic oxidation of VX-simulation substance

E. Koslova, A. Vorontsov, G. Rima, C. Lion, S. Preis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


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%.

Original languageEnglish
Title of host publicationOxidation Technologies for Water and Wastewater Treatment IV - Selected Papers of the 4th International Conference on Oxidation Technologies for Water and Wastewater Treatment
EditorsAlfons Vogelpohl, Michael Sievers, Sven-Uwe Geiben
Number of pages6
StatePublished - 2007
Externally publishedYes

Publication series

NameWater Science and Technology
ISSN (Print)0273-1223


  • Chemical warfare agents
  • Cysteamine-S-phosphate
  • Mineralisation
  • Organsulphurous compounds
  • VX-gas


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