Desorption of sediment-associated polychlorinated dibenzo-p-dioxins, dibenzofurans, diphenyl ethers and hydroxydiphenyl ethers from contaminated sediment

Chemosphere
Arto J SormunenJussi V K Kukkonen

Abstract

The transport and bioavailability of sediment-associated contaminants are often controlled by the contaminants' desorbing behaviour. This study examines the desorption kinetics of polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), diphenyl ethers (PCDEs) and hydroxydiphenyl ethers (HO-PCDEs) from the highly contaminated River Kymijoki sediment in Finland. The desorption kinetics data were generated using Tenax((R)) extraction, and a first-order three-compartment kinetic model was fitted to the data. The desorption data was compared to the previously published accumulation data from this same location to investigate the relationship between the rapidly desorbing fraction (F(r)) and biota-sediment accumulation factors (BSAFs) as well as semipermeable membrane device sediment accumulation factors (SSAFs). The PCDDs, PCDFs, PCDEs and HO-PCDEs were tightly attached to sediment particles and formed a large very slowly desorbing fraction (F(vs)). Rapidly desorbing fractions (F(r)) varied between 0.8% and 8% of total amount in sediment. The size of the desorbing fraction was congener-specific and F(r) decreased with the increasing lipophilicity of congeners. The size of the F(r) was unable to explain the small variation ...Continue Reading

References

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Citations

Sep 10, 2008·Archives of Environmental Contamination and Toxicology·Arto J SormunenJussi V K Kukkonen
Apr 15, 2010·Journal of Hazardous Materials·Xinglun YangXin Jiang
Nov 8, 2014·Integrated Environmental Assessment and Management·Michael J LydyPeter F Landrum
Jun 30, 2015·Environmental Toxicology and Chemistry·Amanda D HarwoodMichael J Lydy
Dec 15, 2010·Journal of Hazardous Materials·Wenxia LiuBing Zhang
Apr 4, 2017·Archives of Environmental Contamination and Toxicology·Samuel A NutileMichael J Lydy
Dec 19, 2020·The Science of the Total Environment·Markus BrinkmannHenner Hollert

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