School of Ocean Science and Technology, Dalian University of Technology, Panjin Campus, Panjin City, Liaoning, China.
School of Ocean Science and Technology, Dalian University of Technology, Panjin Campus, Panjin City, Liaoning, China.
Environ Pollut. 2022 Sep 15;309:119744. doi: 10.1016/j.envpol.2022.119744. Epub 2022 Jul 14.
Tire wear particles (TWPs), which are among the microplastic pollutants in the environment, can inevitably accumulate in coastal sediments. The present study comprehensively investigated the effect of pristine TWPs on bacterial community structure in coastal sediments and compared the effect of pristine TWPs and aged TWPs on nine strains of bacteria in sediments. In addition, the effect of the TWP leachate was studied with all the nine bacterial strains and the toxicity-causing substances in the leachate was investigated using Bacillus subtilis. Exposure to TWPs could lead to a shift in bacteria community and affect nitrogen metabolism in marine sediments. Aged TWPs were more toxic than pristine TWPs due to changes in particle surface characteristics. The leachate exhibited greater toxicity than TWPs as well, and Zn was identified to be the major toxicity-causing substance. The overall results of this study are important for understanding the effects of TWPs and the leachates on microorganisms in marine sediments.
轮胎磨损颗粒（Tire wear particles，TWPs）是环境中微塑料污染物之一，不可避免地会在沿海沉积物中积累。本研究全面调查了原始 TWPs 对沿海沉积物中细菌群落结构的影响，并比较了原始 TWPs 和老化 TWPs 对沉积物中 9 株细菌的影响。此外，还研究了 TWP 浸出液对所有 9 株细菌的影响，并使用枯草芽孢杆菌（Bacillus subtilis）研究浸出液中的毒性物质。暴露于 TWPs 会导致细菌群落发生变化，并影响海洋沉积物中的氮代谢。由于颗粒表面特性的变化，老化的 TWPs 比原始 TWPs 更具毒性。浸出液的毒性也比 TWPs 更大，并且锌被确定为主要的毒性物质。本研究的总体结果对于了解 TWPs 和浸出液对海洋沉积物中微生物的影响非常重要。
