School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China.
Environ Pollut. 2024 Nov 15;361:124736. doi: 10.1016/j.envpol.2024.124736. Epub 2024 Aug 13.
Tire wear particles (TWPs) in stormwater runoff have been widely detected and were generally classified into microplastics (MPs). TWPs and conventional MPs can be intercepted and accumulated in stormwater filtration systems, but their impacts on filtration, adsorption and microbial degradation processes of conventional pollutants (organic matters, nitrate and ammonium) have not been clarified. TWPs are different from MPs in surface feature, chemical components, adsorption ability and leaching of additives, which might lead to their different impacts on conventional pollutants removal. In this study, five different levels of aged polyethylene MPs (PEMPs) and aged TWPs contamination in stormwater filtration systems were simulated using thirty-three filtration columns. Results showed that ultraviolet aging treatment was less influential for the aging of TWPs than that of PEMPs, the specific surface area of aged PEMPs (1.603 m/g) was over two times of unaged TWPs (0.728 m/g) in the same size. Aged PEMPs and aged TWPs had different impacts on conventional pollutants removal performance and microbial communities, and the difference might be enlarged with exposure duration. The intensified aged PEMPs contamination generally promoted conventional pollutants removal, whereas aged TWPs showed an opposite trend. Mild contamination (0.01% and 0.1%, wt%) of aged PEMP/TWPs was beneficial to the richness and diversity of microbial communities, whereas higher contamination of aged PEMPs/TWPs was harmful. Aged PEMPs and TWPs had different impact on microbial community structure. Overall, the study found that TWPs were more detrimental than PEMPs in filtration systems. The research underscores the need for more comprehensive investigation into the occurrence, effects and management strategies of TWPs, as well as the importance of distinguishing between TWPs and MPs in future studies.
轮胎磨损颗粒（Tire Wear Particles，TWPs）在雨水径流水体中被广泛检出，通常被归类为微塑料（Microplastics，MPs）。TWPs 和传统 MPs 可被雨水过滤系统截留和积累，但它们对传统污染物（有机物、硝酸盐和铵）过滤、吸附和微生物降解过程的影响尚未阐明。TWPs 在表面特征、化学组成、吸附能力和添加剂浸出等方面与 MPs 不同，这可能导致它们对传统污染物去除的影响不同。本研究采用 33 根过滤柱模拟了雨水过滤系统中不同老化程度的聚乙烯 MPs（PEMPs）和 TWPs 污染。结果表明，紫外线老化处理对 TWPs 的老化影响小于 PEMPs，同等粒径下老化 PEMPs 的比表面积（1.603 m/g）是未老化 TWPs 的两倍多。老化 PEMPs 和 TWPs 对传统污染物去除性能和微生物群落有不同的影响，且这种差异可能随暴露时间延长而扩大。强化老化 PEMPs 污染通常会促进传统污染物的去除，而老化 TWPs 则表现出相反的趋势。老化 PEMPs/TWPs 的轻度污染（0.01%和 0.1%，wt%）有利于微生物群落的丰富度和多样性，而较高的老化 PEMPs/TWPs 污染则有害。老化 PEMPs 和 TWPs 对微生物群落结构有不同的影响。总的来说，本研究发现 TWPs 在过滤系统中比 PEMPs 更具危害性。该研究强调需要更全面地研究 TWPs 的发生、影响和管理策略，以及在未来研究中区分 TWPs 和 MPs 的重要性。
