Equilibrium sampling of HOCs in sediments and suspended particulate matter of the Elbe River

Environmental Sciences Europe
Nora Claire NiehusGesine Witt

Abstract

Chemical quality of sediment and suspended particulate matter (SPM) is usually assessed by total chemical concentrations (Ctotal). However, the freely dissolved concentration (Cfree) is the ecologically more relevant parameter for bioavailability, diffusion and bioaccumulation. In recent studies, equilibrium sampling has been applied to determine Cfree of hydrophobic organic contaminants (HOCs) in the sediment pore water, whereas such data are missing for SPM. We applied solid-phase micro-extraction to measure and compare Cfree of PAHs and PCBs in pore water of sediments and SPM sampled along the German part of the river Elbe. Moreover, site-specific distribution ratios were evaluated and Cbio,lipid was predicted using Cfree. Cfree of PAHs remained largely constant while Cfree of PCBs varied along the Elbe River. The highest Ctotal of PCBs and PAHs were found at Prossen (km 13) and Meißen (km 96). PCB Ctotal even exceeded the environmental quality standard for sediment and SPM in Prossen. Site-specific distribution ratios (KD) revealed a stronger sorption for PAHs compared to PCBs, indicating a higher availability of PCBs. Equilibrium partitioning concentrations in lipids (Clip↔sed) showed a high correlation with actually measu...Continue Reading

References

Sep 2, 2003·Chemosphere·Thomas D Bucheli, Orjan Gustafsson
Oct 18, 2005·Chemosphere·Albert A KoelmansOrjan Gustafsson
May 18, 2006·Environmental Toxicology and Chemistry·Fredrik Reichenberg, Philipp Mayer
Jun 3, 2008·Environmental Toxicology and Chemistry·Gerard CornelissenGijs D Breedveld
Aug 25, 2012·Environmental Science & Technology·Annika JahnkeMichael S McLachlan
Feb 23, 2013·The Science of the Total Environment·Markus A WetzelPeter C von der Ohe
Jan 23, 2014·Environmental Science. Processes & Impacts·Annika JahnkeMatthew MacLeod

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Citations

Jan 28, 2022·Environmental Science and Pollution Research International·Michaela Belháčová-MinaříkováBranislav Vrana

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