Toxic effects of three perfluorinated or polyfluorinated compounds (PFCs) on two strains of freshwater algae: Implications for ecological risk assessments

IF 6.9 Q1 Environmental Science

Journal of environmental sciences Pub Date : 2023-09-01 DOI:10.1016/j.jes.2022.10.042

Liangliang Zhang , Xiaowei Zheng , Xianglin Liu , Jue Li , Yanyao Li , Zeming Wang , Nan Zheng , Xiangrong Wang , Zhengqiu Fan

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引用次数: 1

Abstract

Perfluorinated or polyfluorinated compounds (PFCs) continue entering to the environmental as individuals or mixtures, but their toxicological information remains largely unknown. Here, we investigated the toxic effects and ecological risks of Perfluorooctane sulfonic acid (PFOS) and its substitutes on prokaryotes (Chlorella vulgaris) and eukaryotes (Microcystis aeruginosa). Based on the calculated EC₅₀ values, the results showed that PFOS was significantly more toxic to both algae than its alternatives including Perfluorobutane sulfonic acid (PFBS) and 6:2 Fluoromodulated sulfonates (6:2 FTS), and the PFOS-PFBS mixture was more toxic to both algae than the other two PFC mixtures. The action mode of binary PFC mixtures on Chlorella vulgaris was mainly shown as antagonistic and on Microcystis aeruginosa as synergistic, by using Combination index (CI) model coupled with Monte Carlo simulation. The mean risk quotient (RQ) value of three individual PFCs and their mixtures were all below the threshold of 10⁻¹, but the risk of those binary mixtures were higher than that of PFCs individually because of their synergistic effect. Our findings contribute to enhance the understanding of the toxicological information and ecological risks of emerging PFCs and provide a scientific basis for their pollution control.

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三种全氟或多氟化合物对两种淡水藻类的毒性影响:对生态风险评估的影响

全氟或多氟化合物（PFCs）继续以个体或混合物的形式进入环境，但其毒理学信息在很大程度上仍然未知。在此，我们研究了全氟辛烷磺酸（PFOS）及其替代品对原核生物（小球藻）和真核生物（铜绿微囊藻）的毒性作用和生态风险。根据计算的EC50值，结果表明，全氟辛烷磺酸对两种藻类的毒性都明显高于其替代品，包括全氟丁烷磺酸（PFBS）和6:2氟调磺酸（6:2 FTS），全氟丁烷-PFBS混合物对两种藻类的毒性都高于其他两种PFC混合物。采用组合指数（CI）模型结合蒙特卡罗模拟，二元PFC混合物对小球藻的作用模式主要表现为拮抗作用，对铜绿微囊藻的作用方式主要表现为协同作用。三种单独的全氟氯化碳及其混合物的平均风险商（RQ）值均低于10−1的阈值，但由于其协同作用，这些二元混合物的风险高于单独的全氯氯化碳。我们的研究结果有助于加深对新出现的全氟氯化碳的毒理学信息和生态风险的理解，并为其污染控制提供科学依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of environmental sciences Environmental Science (General)

CiteScore

12.80

自引率

0.00%

发文量

审稿时长

17 days

期刊介绍： Journal of Environmental Sciences is an international peer-reviewed journal established in 1989. It is sponsored by the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, and it is jointly published by Elsevier and Science Press. It aims to foster interdisciplinary communication and promote understanding of significant environmental issues. The journal seeks to publish significant and novel research on the fate and behaviour of emerging contaminants, human impact on the environment, human exposure to environmental contaminants and their health effects, and environmental remediation and management. Original research articles, critical reviews, highlights, and perspectives of high quality are published both in print and online.