PMID: 11924545Apr 2, 2002Paper

A mass balance model describing multiyear fate of organochlorine compounds in a high Arctic lake

Environmental Science & Technology
Paul A HelmDennis Gregor

Abstract

Data collected over a 3-year study of a high arctic watershed and lake are used to understand the fate of organochlorine compounds (OCs) and form the basis of a mass balance contaminant fate model. The model uses the fugacity/aquivalence approach to describe OC dynamics between air, stream inflows and outflow, the water column, and surficial sediments. The steady-state model results indicate that stream inflows contributed from 96 to >99% of total chemical loadings, but 57-98% of total loadings were lost from the lake via the outlet, the percentage of which is controlled by the hydrologic regime of the high arctic lake. Conversely, only 0.4-3.4% of loadings were retained within the sediments due to the high export rate, minimal scavenging from the water column and low organic carbon fraction of the sediments. Using the unsteady-state model, which includes year-round processes, degradation was estimated to account for losses of 7-32% for the more persistent OCs and 42-50% for the less persistent OCs (alpha-HCH, gamma-HCH, and endosulfan I). If loadings were eliminated, water column concentrations would decline with half-lives <1 year for less persistent OCs and 1-2 years for the more persistent OCs, whereas the half-lives for OC...Continue Reading

References

Jul 15, 1992·The Science of the Total Environment·L A BarrieT Bidleman
Jul 8, 2000·The Science of the Total Environment·R W MacdonalG A Stern
Nov 14, 2008·Environmental Science and Pollution Research International·F Wania

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Citations

May 4, 2005·The Science of the Total Environment·Raymond G SemkinRoy J Neureuther
Nov 27, 2009·The Science of the Total Environment·Jan WeberTerry Bidleman
May 4, 2005·The Science of the Total Environment·Miriam L DiamondMehran Alaee
Nov 16, 2017·Environmental Science. Processes & Impacts·K R MinerK J Kreutz
Dec 7, 2018·Journal of Exposure Science & Environmental Epidemiology·K R MinerA Liljedahl
Apr 8, 2021·Environmental Science & Technology·Terry F BidlemanLiisa Jantunen
Jul 22, 2015·Environmental Science & Technology·Liisa M JantunenTerry F Bidleman

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