Characterization and risk assessment of seasonal and weather dynamics in organic pollutant mixtures from discharge of a separate sewer system

Water Research
Liza-Marie BeckersWerner Brack

Abstract

Sites of wastewater discharge are hotspots for pollution of freshwaters with organic micropollutants and are often associated with adverse effects to aquatic organisms. The assessment, monitoring and managment of these hotspots is challenged by variations in the pollutant mixture composition due to season, weather conditions and random spills. In this study, we unraveled temporal exposure patterns in organic micropollutant mixtures from wastewater discharge and analyzed respective acute and sublethal risks for aquatic organisms. Samples were taken from two components of a separate sewer system i) a wastewater treatment plant (WWTP) and ii) a rain sewer of a medium size town as well as from the receiving river in different seasons. Rain sewer samples were separately collected for rain and dry - weather conditions. We analyzed 149 compounds by liquid chromatography-tandem mass spectrometry (LC-MS/MS). By considering the pollution dynamics in the point sources, we reduced the complexity of pollutant mixtures by k-means clustering to a few emission groups representing temporal and weather-related pollution patterns. From these groups, we derived biological quality element (BQE) - specific risk patterns. In most cases, one main risk...Continue Reading

Citations

May 7, 2019·Biotechnology for Biofuels·Pengkang JinWenna Yang
Jan 23, 2021·The Science of the Total Environment·Markus WeitereMario Brauns
Jan 17, 2021·The Science of the Total Environment·Lena ReiberMatthias Liess
Feb 18, 2021·Environmental Science and Pollution Research International·Jocelina Paranhos Rosa De VargasJérôme Labanowski
Jul 30, 2021·Environmental Toxicology and Chemistry·Matthias MuschketMartin Krauss

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