Photocatalytic oxidation of VX simulant 2-(butylamino)ethanethiol

Journal of Hazardous Materials
Alexandre V VorontsovPanagiotis G Smirniotis

Abstract

Photocatalytic oxidation of 2-(butylamino)ethanethiol (BAET) was undertaken in aqueous suspension of TiO2 Hombikat UV 100 and Degussa P25 under different initial reaction conditions in order to determine the best parameters for the fastest mineralization of the substrate. BAET is considered to be a simulant for the VX chemical warfare agent. The application of ultrasound had only a small positive effect on the BAET photocatalytic degradation. The highest mineralization rate of 0.433 mg/(l min) was found in unbuffered TiO2 Degussa P25 suspension with initial pH value of about 9.4, TiO2 concentration 500 mg/l and the initial BAET concentration 1000 mg/l. Decreasing of the initial solution pH to 6.1 or below stops the mineralization of BAET while increasing of pH to about 11 drastically changed the degradation profile. At this initial pH, the first 100 min of reaction led to only oxidation of sulfur moiety and organic intermediates accumulated in the solution. Thereafter, mineralization of the products started. The main detected volatile product was butyl aldehyde and the main polar one was 2-(butylamino) acetic acid. In the case of TiO2 Hombikat UV 100, conversion of TOC at initial pH 11 exceeded that at initial pH 9.1. For Degus...Continue Reading

References

May 25, 1999·Journal of Hazardous Materials·M HügülR Apak
Jul 16, 2003·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Yi-Chuan ChenPanagiotis G Smirniotis
Sep 16, 2003·Journal of Hazardous Materials·Sandhya RabindranathanSuguna Yesodharan

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Citations

Feb 7, 2012·Journal of Molecular Graphics & Modelling·Abdul Shafeeuulla KhanBishwajit Ganguly
Sep 3, 2008·Journal of Hazardous Materials·ShiTong HanJianHong Zhang
Mar 14, 2018·Critical Reviews in Analytical Chemistry·Zygfryd WitkiewiczJavier Quagliano
Jan 6, 2009·Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan·Tsutomu HirakawaKoji Takeuchi

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