Equilibrium sampling of polychlorinated biphenyls in River Elbe sediments--Linking bioaccumulation in fish to sediment contamination.

Content Provider	Semantic Scholar
Author	Schaefer, Sabine Antoni, Catherine Möhlenkamp, Christel Claus, Evelyn Reifferscheid, Georg Heininger, Peter Mayer, Philipp
Copyright Year	2015
Abstract	Equilibrium sampling can be applied to measure freely dissolved concentrations (cfree) of hydrophobic organic chemicals (HOCs) that are considered effective concentrations for diffusive uptake and partitioning. It can also yield concentrations in lipids at thermodynamic equilibrium with the sediment (clip⇌sed) by multiplying concentrations in the equilibrium sampling polymer with lipid to polymer partition coefficients. We have applied silicone coated glass jars for equilibrium sampling of seven 'indicator' polychlorinated biphenyls (PCBs) in sediment samples from ten locations along the River Elbe to measure cfree of PCBs and their clip⇌sed. For three sites, we then related clip⇌sed to lipid-normalized PCB concentrations (cbio,lip) that were determined independently by the German Environmental Specimen Bank in common bream, a fish species living in close contact with the sediment: (1) In all cases, cbio,lip were below clip⇌sed, (2) there was proportionality between the two parameters with high R(2) values (0.92-1.00) and (3) the slopes of the linear regressions were very similar between the three stations (0.297; 0.327; 0.390). These results confirm the close link between PCB bioaccumulation and the thermodynamic potential of sediment-associated HOCs for partitioning into lipids. This novel approach gives clearer and more consistent results compared to conventional approaches that are based on total concentrations in sediment and biota-sediment accumulation factors. We propose to apply equilibrium sampling for determining bioavailability and bioaccumulation potential of HOCs, since this technique can provide a thermodynamic basis for the risk assessment and management of contaminated sediments.
File Format	PDF HTM / HTML
DOI	10.1016/j.chemosphere.2015.08.032
PubMed reference number	26313858
Journal	Medline
Volume Number	138
Alternate Webpage(s)	https://orbit.dtu.dk/files/115127910/Equilibrium_sampling.pdf
Alternate Webpage(s)	http://orbit.dtu.dk/files/115127910/Equilibrium_sampling.pdf
Alternate Webpage(s)	https://core.ac.uk/download/pdf/82130469.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.chemosphere.2015.08.032
Journal	Chemosphere
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article