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Ecotoxicological risk assessment of micropollutants from treated urban wastewater effluents for watercourses at a territorial scale: Application and comparison of two approaches.
International Journal of Hygiene and Environmental Health ( IF 6 ) Pub Date : 2019-12-20 , DOI: 10.1016/j.ijheh.2019.113437
Antoine Gosset 1 , Philippe Polomé 2 , Yves Perrodin 3
Affiliation  

In most cases, urban Wastewater Treatment Plants (WWTP) only partially abate pollutants occurring in the influent. Treated effluents can thus contain a complex mixture of ecotoxic pollutants, such as heavy metals, detergents, disinfectants, plasticizers, pharmaceuticals residues or pesticides. In this context, Ecotoxicological Risk Assessment (ERA) provide essential decision-making tools to public authorities for establishing environmental policies and conducting territorial planning. The present work aims to develop a territorial-scale ERA methodology using two complementary approaches based on a Risk Quotient (RQ) calculation: (1) the first, based on the risk linked to each individual pollutant (single substances ERA); (2) the second, considering all pollutants present, and the “cocktail effect” (mixture ERA). This research was performed at 33 urban WWTPs of in a highly urbanized part of France (Lyon area). Initial minimum, median and maximum pollutant concentrations in treated effluents were obtained from a literature review of physico-chemical analysis studies, to reconstitute “typical” effluents. The classical approach (single substances ERA) identified the riskiest substances (e.g. endocrine disruptors, as the Estrone with RQ up to 593.75), and showed the risks for each WWTP. The mixture ERA approach revealed new risks, which were not highlighted in the classical ERA approach, thus increasing the number of WWTPs identified as at risk. This study shows the importance of accounting for the cocktail effect, which is not considered in current regulatory decisions. Finally, this methodology allowed us to identify the riskiest situations (often medium sized WWTPs, releasing into small streams), that could worsen in the context of climate change.



中文翻译:

在领土范围内处理过的城市水道废水中微量污染物的生态毒理风险评估:两种方法的应用和比较。

在大多数情况下,城市污水处理厂(WWTP)仅能部分减少进水口中的污染物。因此,处理后的废水可能包含复杂的生态毒性污染物混合物,例如重金属,清洁剂,消毒剂,增塑剂,药物残留物或农药。在这种情况下,生态毒理风险评估(ERA)为公共机构提供了必要的决策工具,以制定环境政策和进行领土规划。本工作旨在基于风险商数(RQ)的计算,使用两种补充方法来开发一种领土规模的ERA方法:(1)第一种,基于与每种污染物(单一物质ERA)相关的风险;(2)第二,考虑所有存在的污染物和“鸡尾酒效应”(混合物ERA)。这项研究是在法国(利昂地区)高度城市化地区的33个城市污水处理厂进行的。从理化分析研究的文献综述中获得了处理过的废水中的初始最低,中位数和最大污染物浓度,以重构“典型”废水。经典方法(单一物质ERA)确定了风险最高的物质(例如内分泌干扰物,RQ最高为593.75的雌酮),并显示了每个污水处理厂的风险。混合ERA方法揭示了新的风险,而传统ERA方法并未强调这些新风险,因此增加了被确定为处于风险中的污水处理厂的数量。这项研究表明了考虑鸡尾酒效应的重要性,目前的监管决策并未考虑这一点。最后,

更新日期:2019-12-20
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