Wang Li, Bo zu, Lei Li, Jian Li, Jiawen Li and Qiujie Xiang
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引用次数: 0
摘要
微塑料(MPs)污染是水生环境中的一个主要问题。污水处理厂是微塑料的重要点源,也可能是有机污染物的载体。我们分析了污水处理厂中 MP 的数量、形状、颜色和聚合物类型分布。我们还评估了 MPs 作为污水中典型有机污染物(如双酚 A (BPA))载体的潜力。进水中最主要的 MPs 是纤维,主要呈透明黑色,由聚乙烯、聚丙烯和聚苯乙烯组成。在废水处理过程中,MPs 的浓度从进水的 10.89 微克/升降至处理后出水的 0.89 微克/升,不同阶段的处理效率存在显著差异。在模拟废水中,三种主要的 MPs 对双酚 A 具有一定的吸附能力。在废水的预期范围内改变温度和 pH 值会干扰 MPs 与双酚 A 之间的相互作用,对吸附的影响有限。研究结果表明,尽管污水处理厂截留了大量 MP,但由于废水排放量大,每天都有相当数量的 MP 进入水生环境。这些含有双酚 A 等污染物的 MP 可能会威胁鱼类和其他水生生物的健康。然而,通过科学调整运行参数,污水处理厂可以成为 MP 复合污染物的 "可控源"。
Microplastics are effective carriers of bisphenol A and facilitate its escape from wastewater treatment systems
Microplastics (MPs) pollution is a major issue in aquatic environments. Wastewater treatment plants are significant point sources of MPs, which may also be carriers of organic pollutants. We analyzed MP number, shape, color, and polymer type distribution in sewage wastewater treatment plants. The potential of MPs to act as carriers for typical organic pollutants in sewage, such as bisphenol A (BPA), was also assessed. The predominant MPs in the influent were fibers, primarily transparent and black in color, and composed of polyethylene, polypropylene, and polystyrene. During wastewater treatment, the concentration of MPs decreased from 10.89 items per L in the influent to 0.89 items per L in the treated effluent, with significant differences in treatment efficiency at different stages. In the simulated wastewater, the three predominant MPs exhibited certain adsorption capacities for bisphenol A. Changing the temperature and pH within the range expected for wastewater could interfere with the interactions between MPs and bisphenol A, with a limited impact on adsorption. The results show that although wastewater treatment plants intercept a significant amount of MP, a considerable number of them enter the aquatic environment daily because of the high volume of wastewater discharge. These MPs, which carry pollutants such as bisphenol A, may threaten the health of fish and other aquatic organisms. However, by scientifically adjusting operational parameters, wastewater treatment plants could become “controllable sources” of MP compound pollutants.
期刊介绍:
Environmental Science: Processes & Impacts publishes high quality papers in all areas of the environmental chemical sciences, including chemistry of the air, water, soil and sediment. We welcome studies on the environmental fate and effects of anthropogenic and naturally occurring contaminants, both chemical and microbiological, as well as related natural element cycling processes.