期刊
URBAN WATER JOURNAL
卷 12, 期 2, 页码 131-144出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/1573062X.2013.831913
关键词
wet weather flow; CA; PCA; municipal wastewater; dry weather flow; heavy metals
资金
- Ministry of Education, Youth and Sport of the Czech Republic, OpVaVpi ENET [CZ.1.05/2.1.00/03.0069]
During wet weather, combined sewer system overflows affect the quality of water in watercourses. For planning overflows, the lowest possible load of priority substances according to Directive 2008/105/EC is crucial and the knowledge of variability in concentrations of elements in the sewer system is necessary. The behaviour of heavy metals in a sewer system was observed in the course of dry weather flow (DWF) and wet weather flow (WWF). We found, from the comparison of concentration medians for the WWF and DWF that during wet weather periods, an increase in the concentrations of As, Cr, Cd, Pb, Mn and Fe occurs in the sewer system and the effect of nonpoint sources manifests itself. Zn, Cu and Ni concentrations decreased during wet weather periods, and Hg concentrations did not significantly change. During the WWF period, a considerable nonhomogeneity of the sewage system was demonstrated.
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