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Hexachlorocyclohexanes in the Canadian Archipelago. 1. Spatial distribution and pathways of alpha-, beta- and gamma-HCHs in surface water
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2007 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 41, no 8, 2688-2695 p.Article in journal (Refereed) Published
Abstract [en]

Hexachlorocyclohexanes (HCHs) in the surface water of the Canadian Archipelago and south Beaufort Sea were measured in summer, 1999. Overall concentrations of HCH isomers were in order of abundance: alpha-HCH (3.5 +/- 1.2 ng L(-1)) > gamma-HCH (0.31 +/- 0.07 ng L(-1)) > beta-HCH (0.10 +/- 0.03 ng L(-1)). Concentrations and ratios of alpha-HCH/gamma-HCH decreased significantly (p < 0.001 to 0.003) from west to east, but there was no significant variation in alpha-HCH/ beta-HCH. The (+) enantiomer of alpha-HCH was preferentially degraded, with enantiomer fractions (EFs) ranging from 0.432-0.463 and increasing significantly (p < 0.001) from westtoeast. Concentrations alsovaried latitudinally for alpha-HCH and gamma-HCH (p < 0.002) but not for beta-HCH. Principal component analysis with variables alpha-HCH and gamma-HCH concentrations, EF, latitude, and longitude accounted for 71% (PC 1) and 16% (PC 2) of the variance. Mixing in the eastern Archipelago was modeled by assuming three end members with characteristic concentrations of alpha-HCH and gamma-HCH, The model accounted for the observed concentrations and higher EFs of alpha-HCH at the eastern stations.

Place, publisher, year, edition, pages
2007. Vol. 41, no 8, 2688-2695 p.
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Natural Sciences
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SWEDARCTIC 1999, Tundra nordväst 1999
Identifiers
URN: urn:nbn:se:polar:diva-3180DOI: 10.1021/es062375bOAI: oai:DiVA.org:polar-3180DiVA: diva2:1049851
Available from: 2016-11-25 Created: 2016-11-21 Last updated: 2016-11-25

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