聚微塑料的高效脱聚合和低毒性浸出,通过对污水污泥的性热水处理
Xingfeng Yang1, Shiyu Niu1, Xiang Huang1
1School of Environmental and Chemical Engineering, Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai University, Shanghai 200444, People R. China.
Environmental science & technology
|February 5, 2026
概括
污水污泥含有微塑料 (MPs),威胁着生态系统. 性预处理和水热处理 (AHT) 有效地降解了污泥中的聚乙烯二甲 MPs,将其转化为低毒性的溶解有机物质.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MPs) 主要积聚在污水污泥中,在土地上应用时构成生态风险.
- 由污泥传播的MP污染土壤是一个日益严重的环境问题.
研究的目的:
- 开发和评估一种有效的策略,用于降解污水污泥中的聚乙烯二甲 MPs (PET-MPs).
- 通过结合和热水处理来研究MP降解的机制和结果.
主要方法:
- 对含有PET-MPs的污泥进行了性预处理 (pH10.5天),然后在180°C下进行热水处理 (AHT).
- 使用光谱和高分辨率质谱法对MP降解产品和污泥成分进行表征.
主要成果:
- 在AHT过程中,PET-MPs在污泥中的降解率达到了81.83%.
- AHT处理促进了反应性污泥成分 (性,金属离子,有机物) 的形成,这些成分通过水解和激素氧化协同降解PET-MP.
- 降解MP衍生溶解有机物 (MP-DOM) 呈现出低芳香度,低分子量,高和度和高生物可用性.
- MP-DOM显示对水生生物和人类肝细胞 (THLE-2) 的急性毒性较低.
结论:
- 污泥AHT是一种有效的降解聚MP的方法,将其转化为不那么有害的物质.
- 这种方法减轻了与污水污泥中微塑料污染相关的生态风险.
- 产生的低毒性MP-DOM为更安全的污泥管理提供了潜在的途径.
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