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Air-Boreal Forest Transfer and Processing of Polychlorinated Biphenyls

Moeckel, Claudia; Nizzetto, Luca; Strandberg, Bo; Lindroth, Anders LU and Jones, Kevin C. (2009) In Environmental Science & Technology 43(14). p.5282-5289
Abstract
The exchange of persistent organic pollutants (POPS) between different compartments of a typical mature boreal forest was investigated. The study focused on fluxes of polychlorinated biphenyls (PCBs) between the atmosphere, vegetation and soil, and within the soil to assess whether this type of forest acts as a final sink-or temporary repository for POPs. The study, at a Swedish site, suggested total PCB air-to-forest floor fluxes of 1.4 mu g m(-2) year(-1). Much of this could be attributed to compounds bound to particles that may originate from needle surfaces. Degradation half-lives in soil between 6.4 and 30 years for tetra- to hepta-PCBs were obtained using a mass balance approach. This field data-based method derived degradation rates... (More)
The exchange of persistent organic pollutants (POPS) between different compartments of a typical mature boreal forest was investigated. The study focused on fluxes of polychlorinated biphenyls (PCBs) between the atmosphere, vegetation and soil, and within the soil to assess whether this type of forest acts as a final sink-or temporary repository for POPs. The study, at a Swedish site, suggested total PCB air-to-forest floor fluxes of 1.4 mu g m(-2) year(-1). Much of this could be attributed to compounds bound to particles that may originate from needle surfaces. Degradation half-lives in soil between 6.4 and 30 years for tetra- to hepta-PCBs were obtained using a mass balance approach. This field data-based method derived degradation rates of POPS in background soils, although it may have underestimated the persistence of the heavy PCB congeners. Compounds reaching the forest soil appear to be stored efficiently and degraded slowly. As a first approximation, applying the findings from this study site to boreal forests on a global scale suggests that 2-21% (depending on the congener) of the estimated global atmospheric emission deposits to these ecosystems. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Science & Technology
volume
43
issue
14
pages
5282 - 5289
publisher
The American Chemical Society
external identifiers
  • wos:000268138000021
  • scopus:67650462913
ISSN
1520-5851
DOI
10.1021/es803505u
language
English
LU publication?
yes
id
a9f99e48-a496-4420-b2ae-d30614471a29 (old id 1461691)
date added to LUP
2009-08-17 16:42:46
date last changed
2017-06-25 03:59:39
@article{a9f99e48-a496-4420-b2ae-d30614471a29,
  abstract     = {The exchange of persistent organic pollutants (POPS) between different compartments of a typical mature boreal forest was investigated. The study focused on fluxes of polychlorinated biphenyls (PCBs) between the atmosphere, vegetation and soil, and within the soil to assess whether this type of forest acts as a final sink-or temporary repository for POPs. The study, at a Swedish site, suggested total PCB air-to-forest floor fluxes of 1.4 mu g m(-2) year(-1). Much of this could be attributed to compounds bound to particles that may originate from needle surfaces. Degradation half-lives in soil between 6.4 and 30 years for tetra- to hepta-PCBs were obtained using a mass balance approach. This field data-based method derived degradation rates of POPS in background soils, although it may have underestimated the persistence of the heavy PCB congeners. Compounds reaching the forest soil appear to be stored efficiently and degraded slowly. As a first approximation, applying the findings from this study site to boreal forests on a global scale suggests that 2-21% (depending on the congener) of the estimated global atmospheric emission deposits to these ecosystems.},
  author       = {Moeckel, Claudia and Nizzetto, Luca and Strandberg, Bo and Lindroth, Anders and Jones, Kevin C.},
  issn         = {1520-5851},
  language     = {eng},
  number       = {14},
  pages        = {5282--5289},
  publisher    = {The American Chemical Society},
  series       = {Environmental Science & Technology},
  title        = {Air-Boreal Forest Transfer and Processing of Polychlorinated Biphenyls},
  url          = {http://dx.doi.org/10.1021/es803505u},
  volume       = {43},
  year         = {2009},
}