Selective supercritical fluid extraction to identify aged sediment-bound PCBs available for uptake by eel

Tobias Nilsson; J Häkkinen; Per Larsson; Erland Björklund

doi:10.1016/j.envpol.2005.06.021

Selective supercritical fluid extraction to identify aged sediment-bound PCBs available for uptake by eel

Tobias Nilsson, J Häkkinen, Per Larsson, Erland Björklund

Research output: Contribution to journal › Article › peer-review

Abstract

A naturally contaminated sediment was partially extracted with selective supercritical fluid extraction (SFE) to remove a fraction of supposedly bioavailable PCBs from the matrix. Eels (Anguilla anguilla) were cultured in systems with untreated and pre-extracted sediment, respectively, and it was shown that the SFE treatment selectively removed bioavailable PCBs from the sediment, since relative biota-to-sediment accumulation factors (BSAFs) for the eight studied PCB congeners were much lower in the pre-extracted than in the untreated system at the end of the study. Relative BSAF values decreased with about the same relative amount for all eight congeners, independent of the degree of chlorination and the initial concentration in the sediment. The results demonstrate the ability of SFE to selectively remove sediment-bound PCBs that are available for uptake by the eels, thus demonstrating the feasibility of using selective SFE to estimate bioavailability of PCBs in sediments.

Supercritical fluid extraction could successfully measure bioavailable fractions of PCBs in sediment.

Original language	English
Pages (from-to)	87-94
Journal	Environmental Pollution
Volume	140
Issue number	1
DOIs	https://doi.org/10.1016/j.envpol.2005.06.021
Publication status	Published - 2006

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Chemical Ecology/Ecotoxicology (Closed 2011) (011006020), Analytical Chemistry (S/LTH) (011001004)

Subject classification (UKÄ)

Analytical Chemistry
Ecology

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10.1016/j.envpol.2005.06.021

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title = "Selective supercritical fluid extraction to identify aged sediment-bound PCBs available for uptake by eel",

abstract = "A naturally contaminated sediment was partially extracted with selective supercritical fluid extraction (SFE) to remove a fraction of supposedly bioavailable PCBs from the matrix. Eels (Anguilla anguilla) were cultured in systems with untreated and pre-extracted sediment, respectively, and it was shown that the SFE treatment selectively removed bioavailable PCBs from the sediment, since relative biota-to-sediment accumulation factors (BSAFs) for the eight studied PCB congeners were much lower in the pre-extracted than in the untreated system at the end of the study. Relative BSAF values decreased with about the same relative amount for all eight congeners, independent of the degree of chlorination and the initial concentration in the sediment. The results demonstrate the ability of SFE to selectively remove sediment-bound PCBs that are available for uptake by the eels, thus demonstrating the feasibility of using selective SFE to estimate bioavailability of PCBs in sediments. Supercritical fluid extraction could successfully measure bioavailable fractions of PCBs in sediment.",

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AU - Nilsson, Tobias

AU - Häkkinen, J

AU - Larsson, Per

AU - Björklund, Erland

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Ecology/Ecotoxicology (Closed 2011) (011006020), Analytical Chemistry (S/LTH) (011001004)

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Y1 - 2006

N2 - A naturally contaminated sediment was partially extracted with selective supercritical fluid extraction (SFE) to remove a fraction of supposedly bioavailable PCBs from the matrix. Eels (Anguilla anguilla) were cultured in systems with untreated and pre-extracted sediment, respectively, and it was shown that the SFE treatment selectively removed bioavailable PCBs from the sediment, since relative biota-to-sediment accumulation factors (BSAFs) for the eight studied PCB congeners were much lower in the pre-extracted than in the untreated system at the end of the study. Relative BSAF values decreased with about the same relative amount for all eight congeners, independent of the degree of chlorination and the initial concentration in the sediment. The results demonstrate the ability of SFE to selectively remove sediment-bound PCBs that are available for uptake by the eels, thus demonstrating the feasibility of using selective SFE to estimate bioavailability of PCBs in sediments. Supercritical fluid extraction could successfully measure bioavailable fractions of PCBs in sediment.

AB - A naturally contaminated sediment was partially extracted with selective supercritical fluid extraction (SFE) to remove a fraction of supposedly bioavailable PCBs from the matrix. Eels (Anguilla anguilla) were cultured in systems with untreated and pre-extracted sediment, respectively, and it was shown that the SFE treatment selectively removed bioavailable PCBs from the sediment, since relative biota-to-sediment accumulation factors (BSAFs) for the eight studied PCB congeners were much lower in the pre-extracted than in the untreated system at the end of the study. Relative BSAF values decreased with about the same relative amount for all eight congeners, independent of the degree of chlorination and the initial concentration in the sediment. The results demonstrate the ability of SFE to selectively remove sediment-bound PCBs that are available for uptake by the eels, thus demonstrating the feasibility of using selective SFE to estimate bioavailability of PCBs in sediments. Supercritical fluid extraction could successfully measure bioavailable fractions of PCBs in sediment.

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JO - Environmental Pollution

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Selective supercritical fluid extraction to identify aged sediment-bound PCBs available for uptake by eel

Abstract

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