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Photocatalytic degradation of triazophos in aqueous titanium dioxide suspension: identification of intermediates and degradation pathways.
J Hazard Mater. 2007 Jul 19; 146(1-2):204-13.JH

Abstract

The photocatalytic degradation of triazophos in aqueous TiO2 suspension has been studied in a photoreactor operating with simulated solar radiation. The decrease in triazophos concentration followed first-order kinetics with a half-life of 4.76+/-0.42 h at a TiO2 suspension concentration of 10 mg/L. Seventeen degradation products were identified using HPLC-UV, HPLC/MS/MS, GC/MS/MS and IC, and by comparing retention times and spectra with commercially available authentic standards. On the basis of the observed transformation products, two routes were proposed, one based on the initial oxidative cleavage of PS bond to PO bond, and the other on initial cleavage of the ester P-O bonds. Photocatalysis holds promise for the solar treatment of pesticide-contaminated waters.

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Authors+Show Affiliations

Aungpradit T
Postgraduate Education and Research Program in Analytical Chemistry, Department of Chemistry, PO Box 1011 Kasetsart, Kasetsart University, Bangkok 10903, Thailand.
Sutthivaiyakit P
No affiliation info available
Martens D
No affiliation info available
Sutthivaiyakit S
No affiliation info available
Kettrup AA
No affiliation info available

MeSH

CatalysisInsecticidesOrganothiophosphatesPhotochemistrySunlightTitaniumTriazolesWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17215079

Citation

Aungpradit, T, et al. "Photocatalytic Degradation of Triazophos in Aqueous Titanium Dioxide Suspension: Identification of Intermediates and Degradation Pathways." Journal of Hazardous Materials, vol. 146, no. 1-2, 2007, pp. 204-13.
Aungpradit T, Sutthivaiyakit P, Martens D, et al. Photocatalytic degradation of triazophos in aqueous titanium dioxide suspension: identification of intermediates and degradation pathways. J Hazard Mater. 2007;146(1-2):204-13.
Aungpradit, T., Sutthivaiyakit, P., Martens, D., Sutthivaiyakit, S., & Kettrup, A. A. (2007). Photocatalytic degradation of triazophos in aqueous titanium dioxide suspension: identification of intermediates and degradation pathways. Journal of Hazardous Materials, 146(1-2), 204-13.
Aungpradit T, et al. Photocatalytic Degradation of Triazophos in Aqueous Titanium Dioxide Suspension: Identification of Intermediates and Degradation Pathways. J Hazard Mater. 2007 Jul 19;146(1-2):204-13. PubMed PMID: 17215079.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photocatalytic degradation of triazophos in aqueous titanium dioxide suspension: identification of intermediates and degradation pathways. AU - Aungpradit,T, AU - Sutthivaiyakit,P, AU - Martens,D, AU - Sutthivaiyakit,S, AU - Kettrup,A A F, Y1 - 2006/12/08/ PY - 2006/10/17/received PY - 2006/12/01/revised PY - 2006/12/04/accepted PY - 2007/1/12/pubmed PY - 2007/9/5/medline PY - 2007/1/12/entrez SP - 204 EP - 13 JF - Journal of hazardous materials JO - J Hazard Mater VL - 146 IS - 1-2 N2 - The photocatalytic degradation of triazophos in aqueous TiO2 suspension has been studied in a photoreactor operating with simulated solar radiation. The decrease in triazophos concentration followed first-order kinetics with a half-life of 4.76+/-0.42 h at a TiO2 suspension concentration of 10 mg/L. Seventeen degradation products were identified using HPLC-UV, HPLC/MS/MS, GC/MS/MS and IC, and by comparing retention times and spectra with commercially available authentic standards. On the basis of the observed transformation products, two routes were proposed, one based on the initial oxidative cleavage of PS bond to PO bond, and the other on initial cleavage of the ester P-O bonds. Photocatalysis holds promise for the solar treatment of pesticide-contaminated waters. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17215079/Photocatalytic_degradation_of_triazophos_in_aqueous_titanium_dioxide_suspension:_identification_of_intermediates_and_degradation_pathways_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)01436-1 DB - PRIME DP - Unbound Medicine ER -