Effects of multiple environmental factors on the elimination of methomyl in aquaculture water
文献类型： 外文期刊
作者： Fang, Longxiang 1 ; Song, Chao 1 ; Zhang, Jingwei 1 ; Zhang, Shiyun 1 ; Zhang, Cong 1 ; Chen, Jiazhang 1 ; Meng, Shunl 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Jiangsu, Peoples R China
2.Minist Agr & Rural Affairs, Lab Qual & Safety Risk Assessment Aquat Prod Envi, Wuxi 214081, Jiangsu, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Control Qual & Safety Aquat Prod, Beijing 100000, Peoples R China
关键词： Methomyl; Aquaculture water; Environmental factors; Degradation dynamics
期刊名称：AQUACULTURE ENVIRONMENT INTERACTIONS （ 影响因子：3.074； 五年影响因子：3.475 ）
ISSN： 1869-215X
年卷期： 2019 年 11 卷
页码：
收录情况： SCI
摘要： Methomyl is a highly effective broad-spectrum carbamate pesticide that is widely used in the control of pests and diseases in crops. However, few studies have assessed the degradation of methomyl residues in aquaculture environments. In this study, the effects of pH, temperature, illumination, and aerobic/anaerobic conditions in pond water were analyzed to study the degradation pattern of methomyl. The pesticide residues in all treatments were extracted per solid-phase extraction technique and analyzed using liquid chromatography-mass spectrometry. The results showed that the degradation process of methomyl satisfied the first-order kinetics reaction, and the half-life and percent degradation of methomyl ranged from 6.19-49.33 d and 21-97 %, respectively. Simultaneous variance analysis indicated that all the tested experimental factors had a significant effect on the results, with pH being the most significant. We conclude that methomyl was used frequently in summer, and that high water temperature and long illumination contribute to the degradation of methomyl. We provide theoretical guidance for the safer use of methomyl in production by further reducing the risk from methomyl residues and further ensuring the safety of products from aquaculture.
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