电子垃圾衍生微塑料在水性环境中释放的反:塑料特性和环境因素的影响
Lihui Wu1, Zijuan Zhong1, Zhengdong Wang1
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
Environmental pollution (Barking, Essex : 1987)
|February 1, 2025
概括
从电子废弃物微塑料 (MP) 中释放的反 (Sb) 是一个新兴的环境问题. 随着粒子尺寸的缩小和紫外线的老化,Sb的释放量增加,并且受到pH和湿酸水平的影响.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- (Sb) 化合物,特别是三氧化 (Sb2O3),被广泛用于电子产品塑料中的阻燃剂.
- 电子废物 (e-waste) 是一种重要的反污染源,微塑料 (MPs) 在其释放到环境中起着至关重要的作用.
- 电子废物衍生MP释放Sb的精确机制和影响因素仍然不完全理解.
研究的目的:
- 研究来自电子垃圾的 (Sb) 从烯-丁-烯 (ABS) 和高冲击聚烯 (HIPS) 微塑料中的释放行为.
- 评估颗粒大小,塑料老化 (紫外线暴露) 和环境条件 (pH,湿酸,无机离子) 对Sb释放的影响.
- 为了阐明释放的的化学物种化.
主要方法:
- 在不同的条件下,从ABS和HIPSMP中释放Sb的实验调查.
- 分析Sb释放受颗粒大小减小的影响 (2毫米到0.15毫米).
- 从原始和紫外线老化MP中释放Sb的评估.
- 评估环境因素,包括pH值,湿酸存在和无机离子.
主要成果:
- 高冲击聚钢 (HIPS) 的总Sb (Sbtot) 释放量高于ABS,这是由于水性和结晶性的差异.
- 减少颗粒大小显著增加了Sbtot释放;从2毫米减少到0.15毫米导致HIPS增加620%和ABS增加350%.
- 紫外线老化通过增加水友性和减少结晶性来增强Sbtot的释放.
- 纯净的MP释放了约40%的Sb(III),而紫外线老化的MP则仅释放了Sb(V).
- 在酸性和性条件下,Sbtot的释放显著增强,特别是在极端的pH值下,但被酸抑制.
结论:
- 从电子废物衍生的微塑料中可以释放大量的反到环境中.
- 诸如颗粒大小,紫外线老化,pH值和湿酸的存在等因素极大地影响了Sb释放的动态.
- 了解这些释放机制对于评估电子废物受影响地区微塑料与抗氧化物污染相关的环境风险至关重要.
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