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
作者： You, Xiangwei 1 ; Zheng, Hao 2 ; Ge, Jing 3 ; Fang, Song 1 ; Suo, Fengyue 1 ; Kong, Qingxian 1 ; Zhao, Peng 1 ; Zhang, Gu 1 ;
作者机构： 1.Chinese Acad Agr Sci, Tobacco Res Inst, Marine Agr Res Ctr, Qingdao 266101, Shandong, Peoples R China
2.Ocean Univ China, Inst Adv Ocean Study, Key Lab Marine Environm & Ecol, Inst Coastal Environm Pollut Control,Minist Educ, Qingdao 266100, Shandong, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Food Qual & Safety, Zhongling St, Nanjing 210014, Jiangsu, Peoples R China
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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