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Remobilization of Polychlorinated Biphenyl from Baltic Sea Sediment: Comparing the Roles of Bioturbation and Physical Resuspension
Stockholms universitet, Naturvetenskapliga fakulteten, Systemekologiska institutionen.
Stockholms universitet, Naturvetenskapliga fakulteten, Systemekologiska institutionen.
Stockholms universitet, Naturvetenskapliga fakulteten, Systemekologiska institutionen.
2009 (Engelska)Ingår i: Environmental Toxicology and Chemistry, ISSN 0730-7268, E-ISSN 1552-8618, Vol. 28, nr 11, s. 2241-2249Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The release of a C-14-labeled trichlorobiphenyl compound ([C-14]PCB 32) from sediment to water was quantified weekly in a 30-d microcosm experiment with recirculating water. Two modes of bioturbation-driven polychlorinated biphenyl (PCB) release-bioturbation by the amphipod Monoporeia affinis (a particle biodiffuser) and bioturbation by the polychaete Marenzelleria sp. (a bioirrigator)-were compared to the PCB release caused by physical resuspension of the sediment generated by a motor-driven paddle used twice a week. Bioturbation by the amphipod M. affinis caused a significantly higher remobilization of both particle-associated PCB (PCBpart) and dissolved PCB (PCBdiss) than the other treatments. Bioturbation by Marenzelleria sp. and physical resuspension caused a similar release of PCBdiss despite a significantly higher amount of total suspended solids in the water column after physical resuspension. In all treatments, the release of PCBdiss was more than one order of magnitude higher than that of PCBpart, indicating a significant potential route of exposure for pelagic organisms, such as fish, to the most bioavailable PCB form. Calculated mass-transfer coefficients (0.3-1.3 cm/d) correspond to previously reported values for trichlorinated PCBs. The present results indicate that biological reworking of sediments can be just as, or even more, important than physical resuspension for the remobilization of sediment-bound contaminants.

Ort, förlag, år, upplaga, sidor
2009. Vol. 28, nr 11, s. 2241-2249
Nyckelord [en]
* Flux; * Pollutant; * Benthos; * Invasive species; * Mechanical disturbance
Nationell ämneskategori
Ekologi
Identifikatorer
URN: urn:nbn:se:su:diva-33017DOI: 10.1897/08-576.1OAI: oai:DiVA.org:su-33017DiVA, id: diva2:282192
Tillgänglig från: 2009-12-18 Skapad: 2009-12-18 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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