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生物降解塑料在水生环境中的光降解:当前的理解和挑战

Vinhteang Kaing¹, Zhongyu Guo², Ty Sok³

¹Department of Civil and Environmental Engineering, Tokyo Institute of Technology, 2-12-1-M1-4 Ookayama, Meguro-ku, Tokyo 152-8550, Japan; Faculty of Hydrology and Water Resources Engineering, Institute of Technology of Cambodia, Russian Federation Blvd., P.O. Box 86, Phnom Penh, Cambodia.

The Science of the total environment

|November 19, 2023

概括

可生物降解塑料可能并不像想象的那样环保,因为它们的光降解由阳光和活性氧物种 (ROS) 是复杂的. 需要对ROS在塑料转化中的作用进行进一步的研究.

科学领域:

环境化学环境化学
聚合物科学聚合物科学
水上科学水上科学

背景情况:

塑料在水生环境中通过直接和间接的光解进行物理和化学转化.
可生物降解塑料,通常是含有的聚合物,在化学上与具有碳化合物骨干的非生物降解塑料有所不同.
水中的运输动态影响塑料暴露在阳光和光解中.

研究的目的:

研究影响水生环境中的可生物降解和不可生物降解塑料的光解过程.
为了比较不同类型的塑料对光降解的易感性.
探索活性氧物种 (ROS) 在塑料转化中的作用.

主要方法:

对塑料光解现有知识的审查和综合.
假设基于塑料成分的不同光解速率.
分析微/纳米塑料对污染物运输的潜在影响.

主要成果:

对于非生物降解塑料,直接光解可能更为重要.
微/纳米塑料更容易受到光降解和光转化的影响.
可生物降解的塑料可能会产生更高的ROS,可能会促进它们自身的光降解.
来自可生物降解来源的微/纳米塑料可能更有效地携带有机污染物.

结论:

由于复杂的光解和ROS相互作用,生物降解塑料的环境效益需要重新评估.
可生物降解塑料的光降解,尤其是ROS的光降解,需要进一步研究.
来自可生物降解塑料的微/纳米塑料作为污染物载体具有潜在风险.

关键词:

添加剂添加剂添加剂微塑料是微塑料中的一种.照相降解是一种光降解.聚合物的聚合物.有反应性氧物种的反应性氧物种.

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