Journal article
Spatial and temporal variations of persistent organic pollutants impacted by episodic sediment resuspension in southern Lake Michigan
Journal of Great Lakes research, Vol.36(2), pp.256-266
2010
DOI: 10.1016/j.jglr.2010.02.009
PMCID: PMC4193955
PMID: 25309030
Abstract
The impacts of large-scale, episodic sediment resuspension on the cycling of polychlorinated biphenyl congeners (PCBs) were examined using a spatially coordinated air and water sampling strategy conducted in southern Lake Michigan in the late winters of 1998, 1999, and 2000. We found no significant temporal changes in gas phase, dissolved phase, or suspended sediment PCB concentrations despite large-scale seasonal storms occurring before and after sampling campaigns. Only gas phase and suspended sediment PCBs varied spatially. Higher total suspended material (
TSM) concentrations and fraction organic carbon (
f
oc
) were measured at sampling stations located in the near-shore region of southern Lake Michigan than at open-water sampling stations. Gas phase concentrations (ΣPCB
g) were higher in the west (0.436
±
0.200
ng/m
3,
n
=
11) and south (0.408
±
0.286
ng/m
3,
n
=
5) than the east (0.214
±
0.082
ng/m
3,
n
=
10) and central (0.253
±
0.145
ng/m
3,
n
=
8) regions of southern Lake Michigan. Dissolved phase concentrations (ΣPCB
d) averaged 0.18
±
0.024
ng/L (
n
=
52); suspended sediment concentrations (ΣPCB
s) accounted for between 4% and 72% (23
±
4%,
n
=
52) of the total ΣPCB concentrations (ΣPCB
T
=
ΣPCB
d
+
ΣPCB
s). Despite no consistent temporal variations in both dissolved phase or suspended sediment ΣPCB concentrations, there were temporal and spatial variations in the distribution shift between phases that can be linked to sediment resuspension, not a state of equilibrium. Specifically, our analysis suggests sediment resuspension results in preferential sorption of heavier, more chlorinated PCB congeners.
Details
- Title: Subtitle
- Spatial and temporal variations of persistent organic pollutants impacted by episodic sediment resuspension in southern Lake Michigan
- Creators
- Sondra M Miller - Department of Civil Engineering, Boise State University, 1910 University Drive, Boise, ID 83725-2075, USAKeri C Hornbuckle - Department of Civil and Environmental Engineering, The University of Iowa, 4105 Seamans Center for the Engineering Arts and Sciences, Iowa City, IA 52242-1527, USA
- Resource Type
- Journal article
- Publication Details
- Journal of Great Lakes research, Vol.36(2), pp.256-266
- DOI
- 10.1016/j.jglr.2010.02.009
- PMID
- 25309030
- PMCID
- PMC4193955
- NLM abbreviation
- J Great Lakes Res
- ISSN
- 0380-1330
- Publisher
- Elsevier B.V
- Language
- English
- Date published
- 2010
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health
- Record Identifier
- 9983997429802771
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