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Ecotoxicity profile of heavily contaminated surface water of two rivers in Tunisia

机译：突尼斯两条河流重污染地表水的生态毒性剖面

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摘要

Persistent organic and inorganic contaminants generated by industrial effluent wastes poses a threat to the maintenance of aquatic ecosystems and public health. The Khniss and Hamdoun rivers, located in the central-east of Tunisia, receive regularly domestic and textile wastewater load. The present study aimed to survey the water quality of these rivers using physicochemical, analytical and toxicological approaches. In the physicochemical analysis, the recorded levels of COD and TSS in both samples exceed the Tunisian standards. Using the analytical approach, several metals and some textile dyes were detected. Indeed, 17 metals were detected in both samples in varying concentrations, which do not exceed the Tunisian standards. The sources of metals pollution can be of natural and anthropogenic origin. Three textile disperse dyes were detected with high levels compared to other studies: the disperse orange 37 was detected in the Khniss river with a concentration of 6.438 μg/L and the disperse red 1 and the disperse yellow 3 were detected in the Hamdoun river with concentrations of 3.873 μg/L and 1895 μg/L, respectively. Textile activities were the major sources of disperse dyes. For both samples, acute and chronic ecotoxicity was observed in all the studied organisms, however, no genotoxic activity was detected. The presence of metals and textile disperse dyes could be associated with the ecotoxicological effects observed in the river waters, in particular due to the industrial activity, a fact that could deteriorate the ecosystem and therefore threaten the human health of the population living in the study areas. Combining chemical and biological approaches, allowed the detection of water ecotoxicity in testing organisms and the identification of possible contributors to the toxicity observed in these multi-stressed water reservoirs.
机译：工业废物产生产生的持久性有机和无机污染物对维持水生生态系统和公共卫生构成威胁。 Khniss and Hamdoun Rivers，位于突尼斯市中心，经常接待国内和纺织废水负荷。本研究旨在使用物理化学，分析和毒理学方法调查这些河流的水质。在物理化学分析中，两种样品中记录的COD水平和TSS超过突尼斯标准。使用分析方法，检测几种金属和一些纺织染料。实际上，在不同浓度的样品中检测到17个金属，不超过突尼斯标准。金属污染源可以是天然和人为的原产。与其他研究相比，用高水平检测三种纺织分散染料：在Khniss河流中检测到分散的橙色37，浓度为6.438μg/ L，并且在Hamdoun河中检测到分散的红色1和分散黄色3，浓度分别为3.873μg/ L和1895μg/ L.纺织活动是分散染料的主要来源。对于样品，在所有研究的生物中观察到急性和慢性生态毒性，然而，没有检测到基因毒性活性。金属和纺织分散染料的存在可能与河水中观察到的生态毒理学效应有关，特别是由于工业活动，这可能会恶化生态系统，因此威胁到研究领域的人口的人类健康。结合化学和生物学方法，允许检测试验生物中的水生态毒性，并鉴定这些多应力水库中观察到的毒性可能的贡献者。

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  • 来源
    《Environmental toxicology and pharmacology》 |2021年第2期|103550.1-103550.10|共10页
  • 作者

    Nosra Methneni; Jose Antonio Morales Gonzalez; Joris Van Loco; Roel Anthonissen; Jolien Van de Maele; Luc Verschaeve; Mercedes Fernandez-Serrano; Hedi Ben Mansour;

  • 作者单位

    Research Unit of Analysis and Process Applied to the Environment-APAE (UR17ES32) Higher Institute of Applied Sciences and Technology Mahdia University of Monastir Monastir Tunisia Department of Chemical Engineering Faculty of Sciences University of Granada Spain Laboratory of Chemical Residues and Contaminants Direction of Food Medicines and Consumer Safety Brussels Belgium;

    Department of Chemical Engineering Faculty of Sciences University of Granada Spain;

    Laboratory of Chemical Residues and Contaminants Direction of Food Medicines and Consumer Safety Brussels Belgium;

    Chemical and Physical Health Risks Sciensano Brussels Belgium;

    Chemical and Physical Health Risks Sciensano Brussels Belgium;

    Chemical and Physical Health Risks Sciensano Brussels Belgium;

    Department of Chemical Engineering Faculty of Sciences University of Granada Spain;

    Research Unit of Analysis and Process Applied to the Environment-APAE (UR17ES32) Higher Institute of Applied Sciences and Technology Mahdia University of Monastir Monastir Tunisia;

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    Keywords:Water quality; Rivers; Organic and inorganic contaminants; textile wastewater; Ecotoxicity;

    机译：关键词：水质;河流;有机和无机污染物;纺织废水;生态毒性;

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