Di Cicco Mattia, Tabilio Di Camillo Agostina, Di Marzio Walter, Sáenz Maria Elena, Galassi Diana Maria Paola, Pieraccini Giuseppe, Galante Angelo, Di Censo Davide, Di Lorenzo Tiziana
Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
National Research Council-Research Institute on Terrestrial Ecosystems (CNR-IRET), Florence, Italy.
Environ Toxicol Chem. 2024 Dec;43(12):2515-2527. doi: 10.1002/etc.5977. Epub 2024 Aug 26.
Aliphatic chlorinated hydrocarbons, notably tetrachloroethylene (also known as perchloroethylene [PCE]), are persistent, mobile, and toxic (PMT) and/or very persistent, mobile, and toxic (vPMT) groundwater pollutants, often exceeding safe drinking water thresholds. The present study delves into the groundwater risk assessment of PCE with a novel focus on the sensitivity of stygobitic species-organisms uniquely adapted to groundwater environments. Through a comparative analysis of the subchronic effects of PCE on the locomotion behavior of two copepod species, the stygobitic Moraria sp. and the nonstygobitic Bryocamptus zschokkei, we highlighted the inadequacy of the current European predicted-no-effect concentration of PCE for groundwater ecosystems. Our findings indicate significant behavioral impairments in both species at a concentration (32 ng/L PCE) well below the threshold deemed safe, suggesting that the current European guidelines for groundwater risk assessment may not adequately protect the unique biodiversity of groundwater habitats. Importantly, B. zschokkei demonstrated sensitivity to PCE comparable to or greater than that of the target stygobitic species, suggesting its utility as a substitute species in groundwater risk assessment. The present study adds to the limited research on the ecotoxicological sensitivity of groundwater species to PMT/vPMT chemicals and highlights the need for refined groundwater risk-assessment methodologies that consider the susceptibilities of stygobitic species. Environ Toxicol Chem 2024;43:2515-2527. © 2024 The Author(s). Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
脂肪族氯代烃，尤其是四氯乙烯（也称为全氯乙烯 [PCE]），是持久性、流动性和毒性（PMT）和/或非常持久性、流动性和毒性（vPMT）的地下水污染物，常常超过安全饮用水阈值。本研究深入探讨了PCE的地下水风险评估，特别关注了适应地下水环境的穴居生物物种的敏感性。通过比较分析PCE对两种桡足类动物（穴居的莫拉桡足类和非穴居的佐氏藓钩猛水蚤）运动行为的亚慢性影响，我们强调了当前欧洲预测的PCE对地下水生态系统无影响浓度的不足。我们的研究结果表明，在远低于安全阈值（32 ng/L PCE）的浓度下，两种物种均出现了显著的行为损伤，这表明当前欧洲地下水风险评估指南可能无法充分保护地下水栖息地独特的生物多样性。重要的是，佐氏藓钩猛水蚤对PCE的敏感性与目标穴居物种相当或更高，这表明其可作为地下水风险评估中的替代物种。本研究增加了关于地下水物种对PMT/vPMT化学物质生态毒理学敏感性的有限研究，并强调了需要完善考虑穴居物种易感性的地下水风险评估方法。《环境毒理学与化学》2024年；43:2515 - 2527。© 2024作者。《环境毒理学与化学》由Wiley Periodicals LLC代表SETAC出版。
