橡膠輪胎中的化學物質導致銀鮭魚急性死亡
作者:
小柯機器人發布時間:2020/12/4 16:35:22
美國華盛頓大學Edward P. Kolodziej研究團隊發現,橡膠輪胎產生的化學物質會導致銀鮭魚急性死亡。該項研究成果於2020年12月3日在線發表在《科學》雜誌上。
研究人員表示,在美國太平洋西北部的銀鮭魚(Oncorhynchus kisutch)中,成年鮭魚遷移到城市小溪繁殖時,暴雨接觸每年都會導致無法解釋的急性死亡。
通過研究此現象,研究人員確定了6PPD(N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine),一種全球通用的輪胎橡膠抗氧化劑)的高毒醌轉化產物。對美國西海岸的代表性徑流和受暴雨影響的小溪的回顧性分析表明,在有毒濃度(LC50為0.8±0.16 μg/L)下普遍存在6PPD-醌(<0.3-19 μg/L)。
這些結果揭示了6PPD抗氧化劑對水生物種的意外危害,並提示了輪胎橡膠殘留物的毒理學意義。
附:英文原文
Title: A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon
Author: Zhenyu Tian, Haoqi Zhao, Katherine T. Peter, Melissa Gonzalez, Jill Wetzel, Christopher Wu, Ximin Hu, Jasmine Prat, Emma Mudrock, Rachel Hettinger, Allan E. Cortina, Rajshree Ghosh Biswas, Flávio Vinicius Crizóstomo Kock, Ronald Soong, Amy Jenne, Bowen Du, Fan Hou, Huan He, Rachel Lundeen, Alicia Gilbreath, Rebecca Sutton, Nathaniel L. Scholz, Jay W. Davis, Michael C. Dodd, Andre Simpson, Jenifer K. McIntyre, Edward P. Kolodziej
Issue&Volume: 2020/12/03
Abstract: In U.S. Pacific Northwest coho salmon (Oncorhynchus kisutch), stormwater exposure annually causes unexplained acute mortality when adult salmon migrate to urban creeks to reproduce. By investigating this phenomenon, we identified a highly toxic quinone transformation product of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine) (6PPD), a globally ubiquitous tire rubber antioxidant. Retrospective analysis of representative roadway runoff and stormwater-impacted creeks of the U.S. West Coast indicated widespread occurrence of 6PPD-quinone (<0.3-19 μg/L) at toxic concentrations (LC50 of 0.8 ± 0.16 μg/L). These results reveal unanticipated risks of 6PPD antioxidants to an aquatic species and imply toxicological relevance for dissipated tire rubber residues.
DOI: 10.1126/science.abd6951
Source: https://science.sciencemag.org/content/early/2020/12/02/science.abd6951
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037