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Acute toxicity of tire wear particles, leachates and toxicity identification evaluation of leachates to the marine copepod, Tigriopus japonicus

Chemosphere 2022 91 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 60 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Yang Liu, Yang Liu, Siyuan Jing, Yang Liu, Yang Liu, Siyuan Jing, Siyuan Jing, Yang Liu, Yang Liu, Kaiming Yang, Kaiming Yang, Yan Liu, Yan Liu, Yan Liu, Xianliang Yi, Xianliang Yi, Kaiming Yang, Xianliang Yi, Yang Liu, Yang Liu, Xianliang Yi, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Yang Liu, Xianliang Yi, Yang Liu, Xianliang Yi, Yang Liu, Xianliang Yi, Yang Liu, Siyuan Jing, Siyuan Jing, Siyuan Jing, Yang Liu, Siyuan Jing, Hao Zhou Hao Zhou Hao Zhou Hao Zhou Hao Zhou Yang Liu, Xianliang Yi, Xianliang Yi, Yang Liu, Yang Liu, Yan Liu, Yang Liu, Yang Liu, Yang Liu, Hao Zhou Ming Yan, Ming Yan, Xianliang Yi, Siyuan Jing, Hao Zhou Kaiming Yang, Yang Liu, Yang Liu, Hao Zhou Xianliang Yi, Kaiming Yang, Hao Zhou Xianliang Yi, Hao Zhou Siyuan Jing, Hao Zhou Yang Liu, Yang Liu, Yan Liu, Yan Liu, Siyuan Jing, Yang Liu, Yang Liu, Kaiming Yang, Ming Yan, Yang Liu, Kaiming Yang, Yang Liu, Kaiming Yang, Hao Zhou Kaiming Yang, Yan Liu, Xianliang Yi, Yan Liu, Hao Zhou Xianliang Yi, Yan Liu, Yan Liu, Siyuan Jing, Xianliang Yi, Yang Liu, Yang Liu, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Xianliang Yi, Yang Liu, Yan Liu, Xianliang Yi, Xianliang Yi, Renyan Liu, Xianliang Yi, Yan Liu, Xianliang Yi, Yan Liu, Hao Zhou Xianliang Yi, Hao Zhou

Summary

Researchers tested the toxicity of tire wear particles and their chemical leachates on a marine copepod species and found that both caused significant harm at measurable concentrations. They used toxicity identification methods to determine that metals, specifically zinc, were the primary toxic component in the leachate. The findings highlight that tire wear particles are a concerning source of microplastic and chemical pollution in coastal marine environments.

Polymers

rubber

Models

Invertebrate other

Tire wear particles (TWPs) have been characterized as microplastics in recent years, and many of these TWPs will be eventually deposited in coastal areas, leading to adverse effects to marine organisms. Results of the acute toxicity test in this study showed that the 96-h LC50 values of the particles and leachate were 771.4 mg/L (95% CI = 684.4-869.6 mg/L) and 5.34 g/L (95% CI = 4.75-6.07 g/L), respectively. The chemical constituents of TWP and the leachate are very complex, and little research has been conducted to determine which of these constituents contribute to the toxicity of TWP leachate to marine organisms. Therefore, the composition of the TWP and leachate was analyzed, and a variety of chemicals were identified, including metals (Mn, Zn, etc.) and organic compounds (cyclohexanthiol, 4-ethyl-1,2-dimethylbenzene, benzothiazole, stearic acid, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, etc.). In addition, the marine copepod Tigriopus japonicus was applied as a model species in the toxicity identification evaluation study to characterize, identify and confirm the toxicity-causing substances in the TWP leachate. Zn was identified and confirmed as the main toxicant contributing to the toxicity. Furthermore, Zn concentrations in the leachate over time were investigated. The release of Zn from TWPs to the aquatic environment was slow, and conformed to a parabolic model with a release constant k of 2.06. The organic component, benzothiazole, exhibited an antagonistic effect with zinc in the acute toxicity of the TWP leachate.

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