中国环境科学

作者：齐杰, 王伟, 刘旭光, 孟鑫, 翟世娇, 孙广垠

单位：1. 河北工程大学能源与环境工程学院, 河北省水污染控制与水生态修复技术创新中心, 河北 邯郸 056038;2. 河北金融学院, 河北 保定 071051;3. 中国科学院生态环境研究中心, 环境水质学国家重点实验室, 北京 100085

关键词：氧化沟,污水厂,微塑料,形态特征,去除效能

基金：河北省科技厅中央引导地方科技发展资金资助项目(236Z3603G);河北省高校青年基金资助项目(QN2022075)

In order to investigate the morphological characteristics and removal patterns of microplastics in urban wastewater plants in China, especially oxidation ditch process wastewater plants, the presence patterns and removal efficacy of MPs in each treatment unit of a two-phase project of an oxidation ditch process wastewater plant in Handan City were thoroughly analyzed. The results showed that the main shape of MPs was fibrous, accounting for 56.5%, followed by fragments and films, with particles accounting for the smallest proportion at only 4.0%. The particle size range was mainly between 150 and 5000μm, with MPs in the 150~500μm range accounting for the highest proportion at 43.0%. The main types were polyethylene, polyester, and polypropylene, accounting for 28.9%, 17.3%, and 22.5%, respectively. The analysis of the effect of shape and particle size on removal efficacy revealed that fibrous MPs were the most difficult to remove, and as particle size decreased, the difficulty of removal increased. The overall removal rates for the first phase of the plant and the expansion project were (92.0 ±2.5)% and (83.6 ±1.6)%, respectively. The analysis of removal rates for each process level and treatment unit showed that the key roles in removal were played by secondary treatment and deep treatment, with the treatment unit being the oxidation ditch sedimentation tank. The main mechanisms were physical sedimentation and retention in the filtration tank.

来源：2024年第11期

《中国环境科学》期刊编辑部

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