- Thiobencarb degradation by TiO2 photocatalysis: Parameter and reaction pathway investigations
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The present study deals with the photocatalytic degradation of the thiocarbamate herbicide, thiobencarb (TBC), in the presence of TiO2 particles and UV-A (λ = 365 nm) radiation. Results show rapid and complete oxidation of TBC after 90 min, and slightly over 70% of TBC was mineralized after 32-h treatment. Factors such as solution pH, TiO2 dosage, and the presence of anions are found to influence the degradation rate. The establishment of the reaction pathway is made possible by a thorough analysis of the reaction mixture identifying the main intermediate products generated. Results suggest that possible transformation pathways may include hydroxylation, dealkylation and C-S bond cleavage processes. The possible degradation pathways are proposed and discussed on the basis of the evidence of oxidative intermediate formation.
- Lai, Hsiao-Fang,Chen, Chiing-Chang,Wu, Ren-Jang,Lu, Chung-Shin
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experimental part
p. 87 - 97
(2012/07/28)
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