Comparative evaluation of soil accumulation of light stabilizers from biodegradable mulching films versus conventional polyethylene ones

文献类型： 外文期刊

第一作者： Fan, Ruiqi

作者： Fan, Ruiqi;Liu, Qi;Cui, Jixiao;Bai, Runhao;Wang, Yang;He, Wenqing;Li, Bingru;Li, Cheng;Liu, Qiuyun;Elias, Robert;Cui, Jixiao;He, Wenqing

作者机构：

关键词： Mulching films; Farmland soil; Light stabilizers; Qualitative and quantitative analysis; Environmental risk

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2024 年 465 卷

页码：

收录情况： SCI

摘要： Light stabilizers are commonly used as additives in mulching films and have environmental persistence, bio-accumulation and ecotoxicity. However, their occurrence and distribution in mulching films and accumulation in mulched soils are seldom reported. This study firstly presents a comprehensive screening of 19 light stabilizers in 65 mulching films and 30 farmland soils collected in China, of which five and eight light stabilizers were 100% detected, respectively. The light stabilizer concentration in biodegradable mulching films was significantly higher than that in polyethylene ones, with median concentrations of 1.75 x 106 mu g/kg and 4.86 x 103 mu g/kg, respectively. Furthermore, a positive correlation was observed between the light stabilizer concentration in mulching films and in soils. This indicates that mulching films play a critical role in the accumulation of light stabilizers in farmland soils, and biodegradable mulching films significantly increase benzotriazole light stabilizers in soils. Although the light stabilizer concentration in farmland soil is relatively low, the sustainable quantities of mulching film input and the long-term accumulation will still pose a threat to the ecological environment and organism health. Consequently, our work reveals the occurrence and environmental risk of light stabilizers in mulching films and farmland soils and brings attention to light stabilizers in the soil environment.

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