某城市污水处理厂中微塑料存在情况及特征

The presence and characteristics of microplastics in a sewage treatment plant in a specific city

微塑料已被公认为是一种新型污染物,因其粒径小、比表面积大、难降解等特点,广泛存在于自然环境中,且被证实会对生物和人类造成潜在危害。进行微塑料的赋存调研有助于了解本地区微塑料的存在现状。本研究以某污水处理厂为对象,对该厂进、出水微塑料数量及特征进行研究。结果表明,该厂进水中微塑料浓度为(6.8±0.67)个/L,主要成分为聚乙烯及聚丙烯,出水中微塑料浓度为(0.18±0.34)个/L,主要成分为聚丙烯。

Microplastics have been recognized as a new type of pollutant due to their small particle size,large surface area,and resistance to degradation.They are widely present in the natural environment and have been proven to pose potential hazards to both organisms and humans.Investigating the occurrence of microplastics helps to understand their current status in a specific region.This study focuses on the quantity and characteristics of microplastics in the influent and effluent of a sewage treatment plant.The results indicate that the concentration of microplastics in the influent of the plant is(6.8±0.67)particles per liter,primarily composed of polyethylene and polypropylene.In the effluent,the concentration of microplastics is(0.18±0.34)particles per liter,mainly consisting of polypropylene.