数字农科院2.0

Geographical patterns, sources, and ecological risks of short- and medium-chain chlorinated paraffins in mulching cultivated soils across China

文献类型： 外文期刊

作者： Jianing Xin;Bingru Li;Xingyi Wu;Li Xu;Yaqun Fan;Su Zhang;Cheng Li;Wenfeng Zhou;Shujun Dong;Peilong Wang

作者机构：

关键词： Chlorinated paraffin;Exposure risk;Geographical distribution;Mulching cultivated soil;Mulching film

期刊名称： Journal of Hazardous Materials

ISSN： 0304-3894

年卷期： 2026 年 503 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： The broad utilization of chlorinated paraffins (CPs) as plasticizers has caused measurable soil pollution. However, the contribution of mulching films as a potential CPs source for agricultural soils remains inconclusive. This study revealed short- and medium-chain CP (SCCP and MCCP) concentrations in mulching cultivated soils from 29 provinces in China, ranging from 19 to 750, and 24–1580 ng/g dry weight (dw), respectively. CP concentrations in mulching cultivated soils from different regions varied, but their congener group profiles were all dominated with C10–11Cl7–8 and C14Cl7–8 for SCCPs and MCCPs, respectively. Mulching duration, cultivated crop types, and local rainfall might influence SCCP and MCCP concentrations in agricultural soils. Furthermore, mulching films were found with high CP contents, with biodegradable films showing higher concentrations (SCCPs: 20400 ng/g; MCCPs: 4410 ng/g) than polyethylene films (SCCPs: 11000 ng/g; MCCPs: 2350 ng/g). CP concentrations in biodegradable film mulched soils were also higher than polyethylene film mulched soils. Mulching films were identified as essential sources for CPs in agricultural soils. Although risk assessment indicated that current SCCP and MCCP concentrations in mulching cultivated soils posed relatively low direct health risks to residents in China, CPs in mulching films and soils should not be ignored and need further attention.

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