Identification and assessment of ecotoxicological hazards attributable to pollutants in urban wet weather discharges,Environmental Science: Processes & Impacts

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Identification and assessment of ecotoxicological hazards attributable to pollutants in urban wet weather discharges
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2017-06-21 00:00:00 , DOI: 10.1039/c7em00159b
Antoine Gosset _{1,

2,

3,

4,

5} , Claude Durrieu _{1,

2,

3,

4,

5} , Frédéric Orias _{1,

2,

3,

4,

5} , Rémy Bayard _{1,

6,

7,

8,

9} , Yves Perrodin _{1,

2,

3,

4,

5}

Affiliation

Urbanization has led to considerable pressure on urban/suburban aquatic ecosystems. Urban Wet Weather Discharges (UWWD) during rainfall events are a major source of pollutants leached onto and into urban surfaces and sewers, which in turn affect aquatic ecosystems. We assessed the ecotoxicity of the different compounds identified in UWWD and identified the hazard represented by each of them. To this end, hazard quotient (HQ) values were calculated for each compound detected in UWWD based on their predicted no effect concentration (PNEC) values and their maximum measured effluent concentrations (MEC_max) found in the dissolved part of UWWD. For the 207 compounds identified in UWWD, sufficient data existed for 165 of them to calculate their PNEC. The ecotoxicity of these compounds varied greatly. Pesticides represented a high proportion of the wide variety of hazardous compounds whose HQ values were calculated (94 HQ values), and they were among the most hazardous pollutants (HQ > 1000) transported by stormwater. The hazard of combined sewer overflows (CSO) was linked mainly to heavy metals and pharmaceutical compounds. Consequently, the monitoring of these pollutants should be a priority in the future. The hazard level of certain pollutants could have been underestimated due to their adsorption onto particles, leading to their low concentration in the dissolved phase of UWWD. Hence, an in-depth study of these pollutants will be required to clarify their effects on aquatic organisms.

中文翻译：

识别和评估可归因于城市潮湿天气排放中污染物的生态毒理危害

城市化给城市/郊区水生生态系统带来了巨大压力。降雨事件期间的城市湿润天气排放物（UWWD）是污染物渗入和渗入城市表面和下水道的主要来源，继而影响水生生态系统。我们评估了UWWD中鉴定出的不同化合物的生态毒性，并确定了每种化合物所代表的危害。为此，根据UWWD中检测到的每种化合物的预测无作用浓度（PNEC）值和其最大测得的废水浓度（MEC _max），计算出危险商（HQ）值）发现在UWWD的溶解部分中。对于UWWD中鉴定的207种化合物，有足够的数据可用于其中165种化合物来计算其PNEC。这些化合物的生态毒性差异很大。在计算出HQ值（94 HQ值）的各种有害化合物中，农药占很大比例，它们是雨水输送的最危险的污染物（HQ> 1000）。下水道溢流（CSO）的危害主要与重金属和药物化合物有关。因此，对这些污染物的监测应成为未来的重点。由于某些污染物吸附到颗粒上，导致其在UWWD溶解相中的浓度较低，因此其危害水平可能被低估了。因此，

更新日期：2017-09-20

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