Plastic films typically receive the addition of plastic additives, such as 2-(2 H-benzotriazol-2-yl)− 4,6-di-tert-pentylphenol (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 log and log 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.

中文翻译：

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土壤中塑料薄膜表面苯并三唑 2-(2H-苯并三唑-2-基)-4,6-二叔戊基苯酚 (UV-328) 的环境归趋：迁移和光转化

塑料薄膜通常添加塑料添加剂，例如 2-(2 H-苯并三唑-2-基)− 4,6-二叔戊基苯酚 (UV-328)，以提高其使用寿命。然而，塑料薄膜由于与塑料非化学结合，会向环境中释放一些添加剂，对环境健康造成一些不利影响。本研究重点研究了典型聚乙烯塑料添加剂UV-328从塑料薄膜到土壤的转移，以及在土壤中的迁移转化过程。结果表明，增加模拟降雨量会减少释放到土壤中的 UV-328 浓度。当土壤深度超过7 cm时，土壤中UV-328的残留浓度显着降低，这可能归因于UV-328的对数和对数值较高。土壤的pH值和过量的有机质对UV-328从塑料薄膜到土壤的迁移产生负面影响，而细小的土壤颗粒尺寸有利于土壤的吸附。 UV-328在土壤中的迁移量与土壤吸附能力呈负相关。在塑料覆盖物和表土表面上鉴定出了大约 13 种 UV-328 转化产物。提出了三种转化途径，主要涉及水解、脂肪链断裂和羟基化。还观察到光转化产物在土壤中的迁移。该研究对于探索塑料薄膜添加剂在环境中的迁移转化具有重要意义。