Micropollutant Loads in the Urban Water Cycle
Micropollutant Loads in the Urban Water Cycle
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DOI：
10.1021/es903823a
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发表时间：
2010-07-01
影响因子：
11.4
通讯作者：
Schirmer, Mario
中科院分区：
文献类型：
--
作者：
Musolff, Andreas;Leschik, Sebastian;Schirmer, Mario
城市水环境中微污染物的评价是一项具有挑战性的任务，因为水平衡和污染物浓度在时间和空间上都具有明显的变异性。在这项研究中，量化了中欧城市排水集水区一年的水量平衡。在几种微污染物浓度监测的基础上，得出了研究区废水、地表水和地下水的污染物质量平衡。微污染物的释放主要是由污水处理厂的排放推动的，然而，联合下水道溢流(CSO)释放了大量的咖啡因、双酚A和技术上的4-壬基苯酚。由于估计有9.9%-13.0%的废水干燥天气流量因污水渗漏到地下水而损失，因此地下水途径也释放了相当数量的双酚A和工业用4-壬基酚。作为间歇性来源的CSO和作为连续途径的地下水以及处理后的废水，其释放负荷的不同时间动态可能会对接受者的水生生态系统造成急性和慢性影响。本研究指出污染途径CSO和地下水在城市水资源污染评价中的重要性。
The assessment of micropollutants in the urban aquatic environment is a challenging task since both the water balance and the contaminant concentrations are characterized by a pronounced variability in time and space. In this study the water balance of a central European urban drainage catchment is quantified for a period of one year. On the basis of a concentration monitoring of several micropollutants, a contaminant mass balance for the study area's wastewater, surface water, and groundwater is derived. The release of micropollutants from the catchment was mainly driven by the discharge of the wastewater treatment plant However, combined sewer overflows (CSO) released significant loads of caffeine, bisphenol A, and technical 4-nonylphenol. Since an estimated fraction of 9.9-13.0% of the wastewater's dry weather flow was lost as sewer leakages to the groundwater, considerable loads of bisphenol A and technical 4-nonylphenol were also released by the groundwater pathway. The different temporal dynamics of release loads by CSO as an intermittent source and groundwater as well as treated wastewater as continuous pathways may induce acute as well as chronic effects on the receiving aquatic ecosystem. This study points out the importance of the pollution pathway CSO and groundwater for the contamination assessments of urban water resources.