垃圾填埋场液微环境对微塑料发生的影响:TOC变化是主要的驱动因素
Jiabao Chen1, Fan Zhang2, Yanhong Li3
1College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; State Key Laboratory of Environmental Criteria and Risk Assessment, and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Journal of hazardous materials
|March 29, 2025
概括
垃圾填埋污水中的微塑料污染很大,小纤维是最常见的. 总有机碳 (TOC) 影响微塑料的行为,促进PET降解,同时抑制PVC,FVMQ和PSU降解.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 污染控制 污染控制
背景情况:
- 垃圾填埋场的液含有各种污染物,如无机盐,重金属和有机物,这些污染物会影响微塑料的行为.
- 关于微环境对垃圾填埋场中的微塑料行为的影响的理解有限.
研究的目的:
- 为了调查中国北方平原垃圾填埋场的微塑料的丰富性和特征.
- 探索水中的物理化学因素与微塑料积累模式之间的关系.
- 确定影响微塑料在液中的行为关键因素.
主要方法:
- 来自15个垃圾填埋场的液中微塑料的丰度和特征的分析.
- 结构方程建模的应用,以探索物理化学因素和微塑料之间的关系.
- 使用回归来识别关键影响因素.
主要成果:
- 研究的液中微塑料的丰富度达到712.0个项目/L,主要是小颗粒和纤维颗粒.
- 总有机碳 (TOC) 显著影响了微塑料,对50-100微米颗粒产生了强烈影响.
- TOC促进了聚乙烯二甲酸盐 (PET) 的降解,但抑制了聚乙烯化物 (PVC),化 (FVMQ) 和聚硫 (PSU) 的降解.
- 垃圾填埋场与 (Cr) 相互作用的年龄和与Cr相互作用的氧化还原潜力被确定为影响微塑料行为的关键因素.
结论:
- 微塑料污染是垃圾填埋污水中一个值得注意的问题,其特点是小颗粒和纤维颗粒.
- 物理化学因素,特别是TOC和,在微塑料的积累,降解和运输中发挥着关键作用.
- 这些发现为有效的废物水处理和对新出现的微塑料污染物进行控制提供了科学基础.
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