Coastal sediments in the Gulf of Bothnia as a source of dissolved PCDD/Fs and PCBs to water and fish

High levels of PCDD/Fs and PCBs in Baltic Sea biota have been a matter of great concern during the last decades. We measured the freely dissolved concentrations of PCDD/Fs and PCBs in sediment pore water and bottom water in eight areas along the Swedish coast of the Gulf of Bothnia, by using state-o...

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Bibliographic Details
Published in:The Science of the total environment 2014-07, Vol.487, p.463-470
Main Authors: Sobek, A., Wiberg, K., Sundqvist, K.L., Haglund, P., Jonsson, P., Cornelissen, G.
Format: Article
Language:English
Subjects:
Agnatha. Pisces
Animal, plant and microbial ecology
Animals
Applied ecology
Applied sciences
Baltic Sea
Benzofurans - analysis
Bioaccumulation
Biological and medical sciences
Chemical activity ratios
Coastal
Contaminants
Dibenzofurans, Polychlorinated
Dissolution
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on vertebrates
Environmental Monitoring
Environmental Sciences
Exact sciences and technology
Fish
Fishes - metabolism
Food Chain
Freshwater
Fundamental and applied biological sciences. Psychology
Geologic Sediments - chemistry
Gulfs
Miljövetenskap
Natural water pollution
Oceanografi, hydrologi, vattenresurser
Oceanography, Hydrology, Water Resources
PCBs
PCDD/Fs
Perch
Pollution
Polychlorinated Biphenyls - analysis
Polychlorinated Dibenzodioxins - analogs & derivatives
Polychlorinated Dibenzodioxins - analysis
Porosity
Seawaters, estuaries
Sediments
Water Pollutants, Chemical - analysis
Water treatment and pollution
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Summary:High levels of PCDD/Fs and PCBs in Baltic Sea biota have been a matter of great concern during the last decades. We measured the freely dissolved concentrations of PCDD/Fs and PCBs in sediment pore water and bottom water in eight areas along the Swedish coast of the Gulf of Bothnia, by using state-of-the-art passive samplers. Chemical activity ratios (calculated from freely dissolved concentrations in pore water and bottom water based on chemical activity ratios) for PCDD/Fs were higher than 1 at all stations (PCDD/Fs average 27; stdev 22). High activity ratios suggest that the sediments have a potential to act as a source of dissolved PCDD/Fs to the water column. Activity ratios for PCBs varied between 0.3 and 17 (average 2; stdev 4). The concentrations of PCDD/Fs and PCBs in bottom water were significantly correlated with concentrations in sediment pore water (p
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2014.04.041