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Development of a simple selective SFE method for the determination of desorption behaviour of PCBs in two Swedish sediments.

Nilsson, Tobias LU ; Bøwadt, Søren and Björklund, Erland LU (2002) In Chemosphere 46(3). p.469-476
Abstract
A simple selective supercritical fluid extraction (SFE) method was developed for the determination of desorption behaviour of PCBs in sediments. This method was applied to determine the distribution of individual PCB congeners among sites of differing bonding strengths in two Swedish sediments (Lake Järnsjön and Baltic bay Orserumsviken). Four different PCB fractions were distinguished in each sediment by applying consecutively harsher supercritical fluid extraction conditions on the same sample. Even though the two sediments had completely different textures, they showed very similar extraction behaviour. It was shown that, in both sediments, a major part of the PCBs (58% and 65%, respectively) were located at "fast sites", from which... (More)
A simple selective supercritical fluid extraction (SFE) method was developed for the determination of desorption behaviour of PCBs in sediments. This method was applied to determine the distribution of individual PCB congeners among sites of differing bonding strengths in two Swedish sediments (Lake Järnsjön and Baltic bay Orserumsviken). Four different PCB fractions were distinguished in each sediment by applying consecutively harsher supercritical fluid extraction conditions on the same sample. Even though the two sediments had completely different textures, they showed very similar extraction behaviour. It was shown that, in both sediments, a major part of the PCBs (58% and 65%, respectively) were located at "fast sites", from which they were extractable already with the mildest extraction conditions (60 min, 40 degrees C and 120 bar). Only a small fraction of the PCBs were so tightly bound to the sediments (located at "slow sites"), that they could be extracted only under the harshest conditions (60 min, 150 degrees C and 400 bar). Information of this kind should be of great value for the determination of bioavailability of pollutants in sediments and soils, and it is the author's belief that this technique has the potential to develop into a powerful tool in environmental risk assessment. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Analytical/*methods, Geologic Sediments/*chemistry, Polychlorinated Biphenyls/*analysis, Water Pollutants, Sweden, Chemical/analysis, Chemistry
in
Chemosphere
volume
46
issue
3
pages
469 - 476
publisher
Elsevier
external identifiers
  • wos:000173519800011
  • pmid:11829403
  • scopus:0036145501
ISSN
1879-1298
DOI
10.1016/S0045-6535(01)00119-9
language
English
LU publication?
yes
id
7426751b-d383-47c6-a7dd-ddba85d26bef (old id 106165)
date added to LUP
2007-06-27 13:23:06
date last changed
2017-08-13 03:39:01
@article{7426751b-d383-47c6-a7dd-ddba85d26bef,
  abstract     = {A simple selective supercritical fluid extraction (SFE) method was developed for the determination of desorption behaviour of PCBs in sediments. This method was applied to determine the distribution of individual PCB congeners among sites of differing bonding strengths in two Swedish sediments (Lake Järnsjön and Baltic bay Orserumsviken). Four different PCB fractions were distinguished in each sediment by applying consecutively harsher supercritical fluid extraction conditions on the same sample. Even though the two sediments had completely different textures, they showed very similar extraction behaviour. It was shown that, in both sediments, a major part of the PCBs (58% and 65%, respectively) were located at "fast sites", from which they were extractable already with the mildest extraction conditions (60 min, 40 degrees C and 120 bar). Only a small fraction of the PCBs were so tightly bound to the sediments (located at "slow sites"), that they could be extracted only under the harshest conditions (60 min, 150 degrees C and 400 bar). Information of this kind should be of great value for the determination of bioavailability of pollutants in sediments and soils, and it is the author's belief that this technique has the potential to develop into a powerful tool in environmental risk assessment.},
  author       = {Nilsson, Tobias and Bøwadt, Søren and Björklund, Erland},
  issn         = {1879-1298},
  keyword      = {Analytical/*methods,Geologic Sediments/*chemistry,Polychlorinated Biphenyls/*analysis,Water Pollutants,Sweden,Chemical/analysis,Chemistry},
  language     = {eng},
  number       = {3},
  pages        = {469--476},
  publisher    = {Elsevier},
  series       = {Chemosphere},
  title        = {Development of a simple selective SFE method for the determination of desorption behaviour of PCBs in two Swedish sediments.},
  url          = {http://dx.doi.org/10.1016/S0045-6535(01)00119-9},
  volume       = {46},
  year         = {2002},
}