在污水处理中纳米塑料和小型微塑料的表征
Shaima Iskandarani1,2, Sarvajith Manjunath2, Rosa Busquets1,3
1Centre for Urban Sustainability and Resilience, Department of Civil, Environmental and Geomatic Engineering, University College London, Gower St, Bloomsbury, London, WC1E 6BT, UK.
Scientific reports
|August 17, 2025
概括
纳米塑料 (NP) 在污水废水中普遍存在,其中小颗粒占主导地位. 传统的废水处理在去除这些塑料污染物方面效率低下,影响了水的再利用潜力.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 水处理技术 水处理技术
背景情况:
- 纳米塑料 (NP) 和微塑料在废水中构成未经研究的环境风险.
- 污水处理厂 (STP) 是塑料颗粒的潜在积聚地点.
- 关于NP在废水中发生的数据有限,特别是在干旱地区.
研究的目的:
- 调查纳米塑料和小微塑料 (50-2500nm) 的发生,回收和表征,在一个全尺寸的STP中.
- 评估传统活性污泥处理塑料颗粒的去除效率.
- 分析废水中的塑料颗粒成分,以发现潜在的水再利用影响.
主要方法:
- 纳米流细胞计的应用用于废水颗粒分析 (全球首次).
- 使用微型拉曼光谱和扫描电子显微镜用能量分散式X射线进行表征.
- 分析来自4000 m3/day容量的STP.原始和经过处理的污水废水.
主要成果:
- 50-100纳米范围内的颗粒构成了STP废水中总颗粒的44%.
- 在原始污水中,塑料颗粒占总颗粒的16% (50-2500nm),在经过处理的废水中增加到41%.
- 确定的聚合物包括聚钢,PVC,聚乙烯,PTFE,聚胺和聚烯.
结论:
- 传统的废水处理在去除纳米塑料和小微塑料方面是无效的.
- 经过处理的污水废水中含有很大比例的塑料颗粒,这引发了对水的再利用的担忧.
- 研究结果强调需要先进的处理策略来减轻水资源中的塑料污染.
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