pH值和盐度对由聚钢微塑料制成的溶解有机物释放的影响,实验研究和分子动力学模拟显示
Yue Yin1, Zhen Li1, Ruotong Li1
1Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China.
The Science of the total environment
|April 3, 2025
概括
从老化聚烯微塑料 (PSMP) 中的微塑料衍生溶解有机物 (MPs-DOM) 释放出更多的物质. 较高的pH值和盐度加快PSMP老化和MPs-DOM释放,影响水生环境.
科学领域:
- 环境化学环境化学
- 聚合物科学 聚合物科学
- 水生毒理学 水生毒理学
背景情况:
- 微塑料衍生溶解有机物 (MPs-DOM) 是一个新兴的环境问题.
- 聚乙烯微塑料 (PSMP) 是普遍存在的污染物,它们的老化过程对于理解MPs-DOM释放至关重要.
研究的目的:
- 从淡水和海水中的照片老化PSMP中描述MPs-DOM.
- 调查环境因素 (pH,盐度) 对PSMP老化和MPs-DOM释放的影响.
- 为了阐明PSMP-MPs-DOM相互作用能量和释放之间的关系.
主要方法:
- 在受控水生环境中对PSMP进行照片衰老实验.
- 使用分析技术对MPs-DOM进行化学表征.
- 分子动力学模拟用于研究相互作用能量和释放机制.
主要成果:
- 塑料添加剂主导着原始PSMPs-DOM;老化引入了新的中间产品.
- 增加的pH值和盐度加速PSMP的衰老,并增强MPs-DOM的释放.
- PSMPs和MPs-DOM之间的较低相互作用能量与更高的释放相关,随着年龄的增长而下降.
结论:
- 像pH值和盐度这样的环境因素显著影响MPs-DOM特性和释放.
- 衰老会降低PSMP和MP-DOM之间的相互作用能量,从而促进释放.
- 了解这些相互作用对于评估水生生态系统中微塑料的环境风险至关重要.
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