Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29074
Title: Photocatalytic oxidation of monuron in the suspension of WO3 under the irradiation of UV-visible light
Authors: Chu, W 
Rao, YF
Keywords: Monuron
WO3
Oxidation mechanism
Decay pathway
Issue Date: 2012
Publisher: Pergamon Press
Source: Chemosphere, 2012, v. 86, no. 11, p. 1079-1086 How to cite?
Journal: Chemosphere 
Abstract: A comprehensive study of the degradation of monuron, one of the phenylurea herbicides, was conducted by UV-VisWO(3) process. It was found that hydroxyl radicals played a major role in the decay of monuron while other radicals (e.g. superoxide) and hole might also contribute to the decomposition of monuron. The oxidation path likely plays a major role in the generation of hydroxyl radicals. The effects of initial pH level, initial concentration of monuron, and inorganic oxidants on the performance of UV-Vis/WO3 process were also investigated and optimized. Comparison between monuron decay pathways by UV-Vis/WO3 and UV/TiO2 was conducted. The decay mechanisms, including N-terminus demethylation, dechlorination and direct hydroxylation on benzene ring, were observed to be involved in the oxidation of monuron in these two processes. Sixteen intermediates were identified during the photodegradation of monuron and degradation pathways were proposed accordingly.
URI: http://hdl.handle.net/10397/29074
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/j.chemosphere.2011.11.062
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