Department of Hydrogeology, UFZ-Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany.
Water Sci Technol. 2010;62(3):684-92. doi: 10.2166/wst.2010.930.
Xenobiotics in urban receiving waters are an emerging problem. A sound knowledge of xenobiotic input, distribution and fate in the aquatic environment is a prerequisite for risk assessments. Methods to assess the impact of xenobiotics on urban receiving waters should address the diverse characteristics of the target compounds and the spatiotemporal variability of concentrations. Here, we present results from a one-year-monitoring program concerning concentrations of pharmaceuticals, additives from personal care products and industrial chemicals in an urban drainage catchment in untreated and treated wastewater, surface water and groundwater. Univariate and multivariate statistical methods were applied to characterize the xenobiotic concentrations. Correlation and principal component analysis revealed a pronounced pattern of xenobiotics in the surface water samples. The concentrations of several xenobiotics were characterized by a negative proportionality to the water temperature. Therefore, seasonal attenuation is assumed to be a major process influencing the measured concentrations. Moreover, dilution of xenobiotics the surface water was found to significantly influence the concentrations. These two processes control more the xenobiotic occurrence in the surface water than the less pronounced concentration pattern in the wastewater sources. For the groundwater samples, we assume that foremost attenuation processes lead to the found differentiation of xenobiotics.
城市受纳水体中的异生物是一个新出现的问题。了解异生物在水生态系统中的输入、分布和归宿，是进行风险评估的前提。评估异生物对城市受纳水体影响的方法，应考虑目标化合物的多样性特征和浓度的时空变异性。本研究提供了一项为期一年的监测计划的结果，该计划涉及城市排水流域中未经处理和处理的废水、地表水和地下水中的药物、个人护理产品添加剂和工业化学品的浓度。应用单变量和多变量统计方法来描述异生物的浓度特征。相关性和主成分分析显示出地表水样本中异生物浓度的明显模式。一些异生物的浓度与水温呈负比例关系。因此，季节性衰减被认为是影响测量浓度的主要过程。此外，还发现地表水的稀释作用显著影响了异生物的浓度。这两个过程比废水源中浓度模式不太明显的过程更能控制地表水异生物的发生。对于地下水样本，我们假设主要是衰减过程导致了所发现的异生物的分化。
