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Determining PCB desorption behaviour on sediments with SFE and investigating the dependency of selective fractions on sediment characteristics

Westbom, Rikard LU ; Josefsson, Sarah LU ; Mathiasson, Lennart LU and Björklund, Erland LU (2007) In International Journal of Environmental Analytical Chemistry 87(4). p.259-274
Abstract
A method for studying PCB desorption behaviour from sediments using supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) is presented. Four sediments were investigated and extracted with supercritical carbon dioxide employing increasingly harsher extraction conditions ranging from 40 degrees C and 12MPa to 100 degrees C and 36.5 MPa. To ensure quantitative extractions, the remaining SFE residues were also extracted with PLE. Resulting profiles identified at least three different PCB fractions within the four sediments. Furthermore, a distinct fraction was obtained with extraction for 2 h at 40 degrees C and 36.5 MPa. This fraction has previously been found to correlate well with bioavailable fractions. The... (More)
A method for studying PCB desorption behaviour from sediments using supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) is presented. Four sediments were investigated and extracted with supercritical carbon dioxide employing increasingly harsher extraction conditions ranging from 40 degrees C and 12MPa to 100 degrees C and 36.5 MPa. To ensure quantitative extractions, the remaining SFE residues were also extracted with PLE. Resulting profiles identified at least three different PCB fractions within the four sediments. Furthermore, a distinct fraction was obtained with extraction for 2 h at 40 degrees C and 36.5 MPa. This fraction has previously been found to correlate well with bioavailable fractions. The dependency of this fraction on sediment total organic carbon (TOC) was investigated, both for sediments examined in this study as well as for previously reported values using the same extraction conditions. It was found that TOC does not correlate to selective SFE, which indicates that the use of TOC to predict bioavailability is questionable. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
sediment, polychlorinated biphenyls, supercritical fluid extraction, bioavailability, total organic carbon
in
International Journal of Environmental Analytical Chemistry
volume
87
issue
4
pages
259 - 274
publisher
Taylor & Francis
external identifiers
  • wos:000244755800003
  • scopus:33847783547
ISSN
1029-0397
DOI
10.1080/03067310601065771
language
English
LU publication?
yes
id
282fbf32-caad-459e-9a1f-6e327a2e5fbd (old id 673727)
date added to LUP
2007-12-19 16:07:03
date last changed
2017-01-08 03:59:36
@article{282fbf32-caad-459e-9a1f-6e327a2e5fbd,
  abstract     = {A method for studying PCB desorption behaviour from sediments using supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) is presented. Four sediments were investigated and extracted with supercritical carbon dioxide employing increasingly harsher extraction conditions ranging from 40 degrees C and 12MPa to 100 degrees C and 36.5 MPa. To ensure quantitative extractions, the remaining SFE residues were also extracted with PLE. Resulting profiles identified at least three different PCB fractions within the four sediments. Furthermore, a distinct fraction was obtained with extraction for 2 h at 40 degrees C and 36.5 MPa. This fraction has previously been found to correlate well with bioavailable fractions. The dependency of this fraction on sediment total organic carbon (TOC) was investigated, both for sediments examined in this study as well as for previously reported values using the same extraction conditions. It was found that TOC does not correlate to selective SFE, which indicates that the use of TOC to predict bioavailability is questionable.},
  author       = {Westbom, Rikard and Josefsson, Sarah and Mathiasson, Lennart and Björklund, Erland},
  issn         = {1029-0397},
  keyword      = {sediment,polychlorinated biphenyls,supercritical fluid extraction,bioavailability,total organic carbon},
  language     = {eng},
  number       = {4},
  pages        = {259--274},
  publisher    = {Taylor & Francis},
  series       = {International Journal of Environmental Analytical Chemistry},
  title        = {Determining PCB desorption behaviour on sediments with SFE and investigating the dependency of selective fractions on sediment characteristics},
  url          = {http://dx.doi.org/10.1080/03067310601065771},
  volume       = {87},
  year         = {2007},
}