Environmental Toxicology and Pharmacology ( IF 4.3 ) Pub Date : 2020-11-20 , DOI: 10.1016/j.etap.2020.103550 Nosra Methneni , José Antonio Morales González , Joris Van Loco , Roel Anthonissen , Jolien Van de Maele , Luc Verschaeve , Mercedes Fernandez-Serrano , Hedi Ben Mansour
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.
中文翻译:
突尼斯两河流域高污染地表水的生态毒性特征
工业废水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健康构成威胁。位于突尼斯中东部的Khniss河和Hamdoun河定期接收生活用水和纺织废水。本研究旨在使用理化,分析和毒理学方法调查这些河流的水质。在理化分析中,两个样品中所记录的COD和TSS含量都超过了突尼斯标准。使用分析方法,检测到了几种金属和一些纺织染料。实际上,在两个样品中都检测到17种金属,且浓度不同,均未超过突尼斯标准。金属污染的来源可以是自然的和人为的。与其他研究相比,检测到三种高水平的纺织品分散染料:在克尼斯河中检测到分散橙37,浓度为6.438 µg / L,在哈姆顿河中检测到分散红1和分散黄3分别为3.873 µg / L和1,895 µg / L。纺织活动是分散染料的主要来源。对于这两个样品,在所有研究的生物中均观察到了急性和慢性生态毒性,但是未检测到遗传毒性。金属和纺织品分散染料的存在可能与在河水中观察到的生态毒理效应有关,特别是由于工业活动,这一事实可能使生态系统恶化并因此威胁到研究区域居民的人类健康。