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污水处理厂是表面水和土壤中微塑料的来源吗?

Haoyu Wei¹, Jian Wang², Suyi Pan¹

¹Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China.

Journal of hazardous materials

|July 30, 2023

概括

污水处理厂将微塑料释放到河流中,但不会显著地进入土壤. 农业薄膜磨损是土壤微塑料的主要来源,影响环境污染评估.

科学领域:

环境科学环境科学
环境化学环境化学
生态毒理学生态毒理学

背景情况:

微塑料 (MP) 在废水处理厂 (WWTP) 和自然环境中普遍存在.
在WWTP和环境组的MP之间确切的关系仍然不清楚.

研究的目的:

调查WWTP,地表水和土壤中MPs的发生情况.
在这些媒体中建立MPs污染之间的关系.
为了确定MPs污染的来源和途径.

主要方法:

在废水,污泥,废水,地表水和土壤中的微塑料的量化和表征.
分析MP的大小,类型 (例如聚乙烯) 和形状 (例如薄膜,纤维,碎片).

主要成果:

实际上,WWTP有效地清除了58.2%的国会议员,但废水仍然是河流的重要来源.
与废水相比,泥对土壤PM污染的贡献较小.
聚乙烯 (PE) 是所有样本中占主导地位的MP类型.
废水和河流中的MP主要是薄膜状,而污泥有更多的纤维,土壤有更多的碎片.
主导的MP尺寸范围为0-200μm.

结论:

水排水和地表排水是河流MP污染的主要原因.
农业薄膜磨损是土壤中MP的主要来源.
了解MP在WWTP和环境中的分布,有助于追踪来源和评估生态风险.

关键词:

微塑料是一种微塑料.发生的情况.土壤土壤土壤.表面的下水流量.废水处理厂的废水处理厂.

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