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Field Measurement of Diffusional Mass Transfer of HOCs at the Sediment-Water Interface
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för tillämpad miljövetenskap (ITM).
2010 (Engelska)Ingår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 44, nr 17, s. 6752-6759Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The sediment to water diffusive flux of PAHs and PCBs was measured under field conditions with a novel infinite-sink benthic flux chamber that deployed semipermeable membrane devices (SPMD) as a sorbing material. Fluxes were measured before and after in situ capping of sediments in Oslo Harbour with clean clay. The fluxes of native pyrene and PCB 52 from uncapped contaminated sediment measured with the flux chamber were 0.3-1.6 mu g m(-2) d(-1) and 2-8 ng m(-2) d(-1), respectively. Fluxes from the capped sediment were reduced by 93-97%. The in situ measured fluxes were compared to fluxes independently calculated from freely dissolved concentrations in pore water and overlying water, measured using equilibrium passive samplers, diffusive boundary layer (DBL) thickness, measured by an alabaster dissolution method and literature values of diffusion coefficients. Measured fluxes from the uncapped sediment agreed well with calculated fluxes, the median of the ratio of the measured flux over the calculated flux was 0.9 with an inter quartile range of 0.5-1.6.

Ort, förlag, år, upplaga, sidor
2010. Vol. 44, nr 17, s. 6752-6759
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URN: urn:nbn:se:su:diva-49451DOI: 10.1021/es100818wISI: 000281225800035OAI: oai:DiVA.org:su-49451DiVA, id: diva2:378353
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authorCount :3Tillgänglig från: 2010-12-15 Skapad: 2010-12-14 Senast uppdaterad: 2022-02-24Bibliografiskt granskad

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Cornelissen, Gerard

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Environmental Science and Technology

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