微塑料在运行中的饮用水分配系统中的各种管道尺度中的纵向和垂直分布
Xinxin Yang1, Xin Xu2, Yisu Zhou1
1Department of Municipal Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China.
Journal of hazardous materials
|August 7, 2023
概括
微塑料 (MPs) 积聚在饮用水管道尺度中,其中较小的颗粒占主导地位. 它们在管道尺度和自来水中的分布在分布系统上有所变化,与重金属相关.
科学领域:
- 环境科学 环境科学
- 水的质量 水的质量
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MP) 越来越多地被发现在饮用水中,这可能会对人类健康造成潜在的风险.
- 饮用水配送系统 (DWDS) 中的管道秤被确定为MP的重要储水池.
- 关于MP在运行DWDS管道尺度内的空间分布的数据有限.
研究的目的:
- 从一个运行的DWDS中调查自来水和管道尺度中的微塑料的丰富性和分布.
- 确定MP的特征,包括大小,聚合物类型,以及它们与环境因素的相关性.
- 填补有关 MPs 在饮用水供应链中的污染的知识空白.
主要方法:
- 从典型的DWDS收集了5个自来水和16个管道尺度样本.
- 在所有收集的样本中分析了MPs的丰度,尺寸分布和聚合物组成.
- 分析MP分布与重金属度之间的相关性,以及管道尺度特征.
主要成果:
- 在所有水 (1.74-20.88 MP/L) 和管道尺度样本 (0.03-3.48 MP/cm2) 中检测到MP.
- 议员们认为,自来水的丰富性在停滞缓慢的流量地区达到顶峰,超过原水水平.
- 较小的MP (<150μm) 占MP总数的91%,随着大小的减少,其丰度以对数的方式增加. 聚胺和聚乙烯四甲酸是主要的聚合物.
- 管道尺度中的MP分布与重金属相关,并且根据尺寸和密度垂直变化.
结论:
- 管道是DWDS中微塑料的关键积累点.
- 饮用水中的MPs污染受流动力学和管道尺度特征的影响.
- 了解MP的分布对于管理水质和减轻人类暴露至关重要.
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