数字农科院2.0

A national-scale distribution of organochlorine pesticides (OCPs) in cropland soils and major types of food crops in China: Co-occurrence and associated risks

文献类型： 外文期刊

作者： Chen, Lu;Qian, YongZhong;Jia, Qi;Weng, Rui;Zhang, Xinglian;Li, Yun;Qiu, Jing

作者机构：

关键词： Organochlorine pesticides (OCPs);Cropland soil;Crops;OCP sources;Co-occurrence;Risk assessment

期刊名称： SCIENCE OF THE TOTAL ENVIRONMENT

ISSN： 0048-9697

年卷期： 2023 年 861 卷

页码：

收录情况： SCIE（2023版） ; ; EI（2023版）

摘要： Organochlorine pesticides (OCPs) are persistent organic pollutants (POPs) that resist degradation in the environment. OCPs remain detectable in cropland systems in China. However, spatial distribution of OCPs across China and associ-ated ecological and health risks, as well as the relationship between levels of OCPs in cropland soils and crops, remain to be elucidated. To fill these gaps, we conducted a national-scale characterization of 19 individual OCPs in cropland soils and food crops including cereals and legumes in China, which were on-spot sampled simultaneously. Sparse ca-nonical correlation analysis was employed to investigate the co-occurrence of OCPs in cropland soils and correspond-ing food crops. The ecological soil screening levels and risk quotient method were adopted for ecological and health risk assessment, respectively. Dichlorodiphenyltrichloroethanes (DDTs) were dominant in cropland systems, with its levels ranging up to 337 and 22.8 mu g/kg in cropland soils and food crops, respectively. The mean n-ary sumation OCP levels in crop-land soils varied from below the limit of detection to 337 mu g/kg. Peanuts were the most contaminated crop, in which endosulfans and hexachlorobenzene (HCB) were co-occurrent with those in cropland soils (correlation coefficient R = 0.999 and 0.947, respectively). Besides, lindane and f3-endosulfan in rice were co-occurrent with those in cropland soils (R = 0.810 and 0.868, respectively). The componential ratio analysis indicated fresh inputs of technical DDT, lin-dane, chlordane, endosulfan, HCB and aldrin. Among these pesticides, ecological impacts of DDTs, lindane, aldrin and f3-endosulfan could be expected. Human health risk assessment suggested that daily consumption of the OCP-contaminated food crops raises a health concern especially for male teens. It is concluded that OCPs remain present in cropland systems in China at levels that raise a concern for both environment and human health.

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