Environmental fate of benzotriazole 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol (UV-328) on the surface of plastic films in soil: Migration and phototransformation

文献类型： 外文期刊

第一作者： Wu, Nannan

作者： Wu, Nannan;Liu, Boying;Zhang, Ying;Qu, Ruijuan;Wang, Zunyao;Sun, Ping;Wu, Nannan;Wu, Nannan;Allam, Ahmed A.;Rady, Ahmed;Altoom, Naif G.;Dar, Afzal Ahmed

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关键词： PE plastic mulches; Plastic additives; UV-328; Migration; Phototransformation

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.7； 五年影响因子：7.3 ）

ISSN： 2213-2929

年卷期： 2024 年 12 卷 2 期

页码：

收录情况： SCI

摘要： Plastic films typically receive the addition of plastic additives, such as 2-(2 H-benzotriazol-2-yl)- 4,6-di-tertpentylphenol (UV-328), to improve their service life. However, plastic films can release some additives into the environment due to their non-chemical binding with plastics, causing some adverse effects on environmental health. This study focused on the transfer of the typical polyethylene plastic additive UV-328 from plastic films to soil, as well as the migration and transformation process in soil. The results showed that increasing simulated rainfall would reduce the concentration of UV-328 released into soil. When the soil depth exceeded 7 cm, the residual concentration of UV-328 in the soil was significantly reduced, which may be attributed to high logKow and logKoc values of UV-328. The pH value and excess organic matter of soil were negatively affecting the migration of UV-328 from plastic films to soil, while fine soil particle size facilitated the soil sorption. The migration of UV-328 in soil was negatively correlated with the soil adsorption capacity. About thirteen transformation products of UV-328 on the surface of plastic mulches and topsoil were identified. Three transformation pathways were proposed, which mainly involved hydrolysis, aliphatic chain cleavage and hydroxylation. The migration of phototransformation products in soil was also observed. This study is of great significance to explore the migration and transformation of plastic film additives in the environment.

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