Effect of Biochar on the Enantioselective Soil Dissipation and Lettuce Uptake and Translocation of the Chiral Pesticide Metalaxyl in Contaminated Soil

文献类型： 外文期刊

第一作者： You, Xiangwei

作者： You, Xiangwei;Fang, Song;Suo, Fengyue;Kong, Qingxian;Zhao, Peng;Zhang, Guangyu;Zhang, Chengsheng;Li, Yiqiang;Zheng, Hao;Ge, Jing

作者机构：

关键词： biochar; chiral pesticide; dissipation; uptake; translocation

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2019 年 67 卷 49 期

页码：

收录情况： SCI

摘要： Enantioselectivity is usually ignored when assessing potential biochar-based methods of redressing pesticide contamination of soils. In this study, the effect of woodchip biochar (WBC) on the enantioselective dissipation of metalaxyl in soil and its uptake and translocation by lettuce were investigated. S-metalaxyl (T-1/2 = 29.8 days) dissipated more quickly than R-metalaxyl (T-1/2 = 36.4 days) in unamended soil. The addition of WBC to the soil decreased the dissipation rate and the enantioselectivity of metalaxyl. Metalaxyl distribution showed opposing enantioselectivity in lettuce, with roots and shoots showing preferences for R-metalaxyl and S-metalaxyl, respectively. Enrichment with WBC decreased the concentrations of metalaxyl and metalaxyl acid enantiomers in lettuce and reduced the ability of the shoots to transport the highly toxic R-metalaxyl from roots. This is the first study to provide evidence that amending soil with biochar affects the enantioselective uptake and translocation of a chiral pesticide.

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