Reduced bioaccumulation of PCBs and PAHs by sediment fauna following in situ remediation with activated carbon in Trondheim Harbor (Norway)
(English)Manuscript (preprint) (Other academic)
Thin-layer capping with activated carbon (AC) was deployed in experimental plots in Trondheim harbor, Norway, using caps containing AC+clay, AC-only or AC+sand. Intact sediment cores were collected from the in situ remediated plots to study the capping efficiency of the various AC treatments in reducing the aqueous concentrations and the bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in the polychaete Hediste diversicolor and the clam Abra nitida. Reduced aqueous concentrations were observed in all AC-treatments, but generally AC+clay appeared to be superior to the other tested treatments. Capping efficiency by AC+clay, in terms of reduced bioaccumulation of PAHs and PCBs, ranged between 40 % and 87% in the worms and between 67% and 97% in the clams. Sediment capped with AC-only also led to reduced bioaccumulation of PCBs, while AC+sand showed no reduction in bioaccumulation. The worms had lower relative lipid content in the AC-only treatment after exposure.
Thin-layer capping, sediment remediation, contaminated sediment, Hediste (Nereis) diversicolor (Polychaeta) and Abra nitida (Mollusca).
Biological Sciences Chemical Sciences Earth and Related Environmental Sciences
Research subject Marine Ecotoxicology
IdentifiersURN: urn:nbn:se:su:diva-94837OAI: oai:DiVA.org:su-94837DiVA: diva2:656545
FunderSwedish Research Council, 210-2007-282Formas, 210-2007-282Vinnova, 210-2007-282