期刊
ENVIRONMENTAL CHEMISTRY LETTERS
卷 2, 期 2, 页码 83-87出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10311-004-0066-7
关键词
monolinuron; phenylurea herbicide; nitrite; induced photolysis; aqueous solution
Here we evidenced the photo-induced degradation of monolinuron, a phenylurea herbicide, through the 300-450 nm light excitation of nitrite and nitrate species. The degradation pathways were compared to those obtained under direct photolysis at 254 nm. When using NO3- and NO2- as photoinducers, hydroxyphenyl-substituted photo degradation products were found to be formed specifically through the involvement of OH degrees radicals. NO- and NO2-phenyl substituted compounds were also observed as a result of the production of NO degrees and NO2 degrees radicals. Half-lives of monolinuron in aqueous solutions were measured in various conditions of concentrations of substrate and inducer, oxygen content and pH.
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