Photodegradation mechanism of deltamethrin and fenvalerate |
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Authors: | Pengyan Liu Yujie Liu Qingxue Liu and Jinwei Liu |
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Institution: | 1. College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China 2. Geological & Mineral Central Laboratory of Hebei Province, Baoding 071051, China |
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Abstract: | To understand the degradation and environmental fate of pyrethroids, the process of their photodegradation under simulated natural
conditions was investigated. The results showed that the degradation process follows first-order kinetics. The degradation intermediates
were identified with gas chromatography-mass spectrometry. A plausible mechanism was discussed to explain the process. Several
influences on degradation process were investigated and reported such as the e ects of initial concentration of pyrethroids, total time
of light irradiation, solvents, and light source, as well as the e ect of a few substances that exist in the environment. This study could
be a good reference for the degradation of pyrethroids in practical circumstances. |
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Keywords: | pyrethroids deltamethrin fenvalerate photodegradation |
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