PMID- 20599243 OWN - NLM STAT- MEDLINE DCOM- 20101124 LR - 20181201 IS - 1879-2448 (Electronic) IS - 0043-1354 (Linking) VI - 44 IP - 15 DP - 2010 Aug TI - Contribution of combined sewer overflows to trace contaminant loads in urban streams. PG - 4451-62 LID - 10.1016/j.watres.2010.06.011 [doi] AB - The present study examines the contribution of combined sewer overflows (CSO) to loads and concentrations of trace contaminants in receiving surface water. A simple method to assess the ratio of CSO to wastewater treatment plant (WWTP) effluents was applied to the urban River Spree in Berlin, Germany. The assessment indicated that annual loads are dominated by CSO for substances with removal in WWTP above approximately 95%. Moreover, it showed that substances with high removal in WWTP can lead to concentration peaks in the river during CSO events. The calculated results could be verified based on eight years of monitoring data from the River Spree, collected between 2000 and 2007. Substances that are well removed in WWTP such as NTA (nitrilotriacetic acid) were found to occur in significantly increased concentration during CSO, while the concentration of substances that are poorly removable in WWTP such as EDTA (ethylenediaminetetraacetic acid) decreased in CSO-influenced samples due to dilution effects. The overall results indicate the potential importance of the CSO pathway of well-removable sewage-based trace contaminants to rivers. In particular, high concentrations during CSO events may be relevant for aquatic organisms. Given the results, it is suggested to include well-removable, sewage-based trace contaminants, a substance group often neglected in the past, in future studies on urban rivers in case of combined sewer systems. The presented methodology is suggested for a first assessment, since it is based solely on urban drainage data, which is available in most cities. CI - (c) 2010 Elsevier Ltd. All rights reserved. FAU - Weyrauch, Philip AU - Weyrauch P AD - Kompetenzzentrum Wasser Berlin, Cicerostrasse 24, 10709 Berlin, Germany. FAU - Matzinger, Andreas AU - Matzinger A FAU - Pawlowsky-Reusing, Erika AU - Pawlowsky-Reusing E FAU - Plume, Stephan AU - Plume S FAU - von Seggern, Dorthe AU - von Seggern D FAU - Heinzmann, Bernd AU - Heinzmann B FAU - Schroeder, Kai AU - Schroeder K FAU - Rouault, Pascale AU - Rouault P LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100612 PL - England TA - Water Res JT - Water research JID - 0105072 RN - 0 (Sewage) RN - 0 (Water Pollutants, Chemical) RN - KA90006V9D (Nitrilotriacetic Acid) SB - IM MH - Berlin MH - Cities MH - Environmental Monitoring/methods MH - Geography MH - Nitrilotriacetic Acid/isolation & purification MH - Rivers/*chemistry MH - Sewage/*chemistry MH - Waste Disposal, Fluid/*methods MH - Water Movements MH - Water Pollutants, Chemical/*isolation & purification EDAT- 2010/07/06 06:00 MHDA- 2010/12/14 06:00 CRDT- 2010/07/06 06:00 PHST- 2009/11/10 00:00 [received] PHST- 2010/05/11 00:00 [revised] PHST- 2010/06/06 00:00 [accepted] PHST- 2010/07/06 06:00 [entrez] PHST- 2010/07/06 06:00 [pubmed] PHST- 2010/12/14 06:00 [medline] AID - S0043-1354(10)00387-8 [pii] AID - 10.1016/j.watres.2010.06.011 [doi] PST - ppublish SO - Water Res. 2010 Aug;44(15):4451-62. doi: 10.1016/j.watres.2010.06.011. Epub 2010 Jun 12.