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微塑料添加剂的复杂释放动态:添加剂降解和微塑料老化的相互作用

Zhe Xu¹, Jianshuai Zhang², Ruimin Qi²

¹Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Department of Civil Engineering, The University of Hong Kong, Hong Kong SAR.

Journal of hazardous materials

|March 2, 2025

概括

紫外线辐射使微塑料添加剂 (如酸盐和BPA) 在水生环境中的释放复杂化. 微塑料在紫外线下老化和添加剂降解显著改变释放率和环境风险.

科学领域:

环境化学环境化学
聚合物科学聚合物科学
生态毒理学生态毒理学

背景情况:

微塑料污染了全球的水生生态系统.
添加剂从微塑料中漏,造成生态毒理风险.
紫外线 (UV) 辐射和微塑料的老化影响添加剂的释放.

研究的目的:

在紫外线辐射下研究微塑料的添加剂释放动态.
确定紫外线暴露,聚合物类型和老化对添加剂释放动力学的影响.
评估UV诱导的添加剂释放的生态毒理学影响.

主要方法:

从PVC,PE和ABS微塑料中研究了特定添加剂 (DMP,DBP,DEHP,BPA,BDE-209) 的释放.
暴露于自然紫外线辐射下的微塑料,与黑暗条件相比.
应用内部粒子扩散 (IPD) 和水性边界层扩散 (ABLD) 模型来分析释放动力学.

主要成果:

紫外线暴露导致复杂的添加剂释放模式,由于降解和微塑料的结构变化.
聚合物类型,微塑料大小,添加剂含量和紫外线条件显著影响了释放.
微塑料的老化通过改变表面化学和聚合物结构加速了添加剂的释放.
紫外线诱导的降解改变了度梯度,影响了扩散和分割系数.

结论:

紫外线辐射和微塑料老化是微塑料添加剂环境命运的关键因素.
了解这些过程对于准确评估微塑料污染的风险至关重要.
调查结果为减轻微塑料相关化学品对环境的影响制定了战略.

关键词:

添加剂降解的降解方法微塑料添加剂微塑料添加剂微塑料的衰老过程中的微塑料释放动态释放动态紫外线辐射辐射的辐射.

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