Comparative study on photocatalytic oxidation of four organophosphorus simulants of chemical warfare agents in aqueous suspension of titanium dioxide

Decontamination of hexavalent chromium and tri-ethyl phosphate stimulants through photacatalytic oxidation

“…In contrast, Cr(III) is relatively insoluble in an aqueous systems and exhibits no toxicity (Ku et al, 2001;Jiang et al, 2006;Xu et al, 2006). The wastewater of pesticide manufacture, including animal poisons, insecticides, fungicides and herbicides, commercially manufacturing, blending, mixing or formulating pesticides usually contain both Chromium and TEP (Chirwa et al, 2000;Kozlova et al, 2004).…”

“…Researchers have studied the photocatalytic oxidation of some organphosphorus pesticides (acrinathrin, methamidophos, malathion, diazion, carbetamide, and insecticide fenitrothion) (Kerzhentsev, et al, 1996;Doong and Chang, 1997;Kozlova et al, 2004). The main intermediates in the degradation of pesticides in wastewater have been studied by Percherancier et al (1995).…”

“…They reported that hydroxylated products and its derivatives as well as products of cycled though the side chain can be made. The intermediate material in the decomposition of some organophosphate was investigated by Kozlova et al (2004). The pervious works show that final products of organophosphate degradation are phosphate, carbon dioxide and water.…”

“…Organophosphate degrades to several intermediate materials; phosphate appears as a solution when it is completely degraded. The Tri-ethyl phosphate (TEP) is an organophosphate which is used as an industrial catalyst, a polymer resin modifier, a plasticizer, an intermediate for pesticides and other chemicals, a stabilizer for peroxides, a strength agent for rubber and plastic including vinyl polymers and unsaturated polyesters, etc (Percherancier et al, 1995;Malato et al, 2000;Kozlova et al, 2004). TEP can be hydrolyzed and Furthermore, effects of pH, UV radiation, TiO 2 dosage and operation condition parameters on the TEP and Cr(VI) oxidation reaction rates were studied.…”

Catalytic Reduction of Hazardous Compound (Triethylphosphate) Using Ni Doped CuO Nanoparticles

“…Semiconductor metal oxides gives excellent adsorption of organophosphonates. The interactions of chemical warfare agent simulants with metal oxide surfaces needs to be studied to understand the destruction of organophosphates using bimetal oxide nanoparticles [9][10][11][12] . Bimetaloxide NPs have been synthesized using various methods like Sol-gel method, Chemical vapour deposition, Chemical reduction method and Wet chemical method [14][15][16][17] .…”