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Estimation of PCC loadings from the atmosphere to the Great Lakes

Estimation of PCC loadings from the atmosphere to the Great Lakes

Chemosphere 27(10): 2047-2055

Recent measurements of the polychlorinated bornanes (camphenes; PCCs) allow the estimation of the dry deposition and wet deposition flux of these chemicals to the Great Lakes. A recent report by Eisenreich and Strachan (1992) estimates the wet flux to be 3.5 - 12.5 kg/yr to each of the five lakes and the dry deposition of particulate bound PCC to be 1.5 - 6.3 kg/yr. This paper estimates the range of fluxes to be expected from gas transfer to Lake Superior. Based on a range of assumptions of the water concentration of PCCs in the lakes, the gas flux will vary from -1.7 to 1.0 mu-g m-2 mo-1 (positive is a flux into the lakes). The annual loading by gas exchange is more than an order of magnitude higher than the input by wet or dry deposition and indicates that the significant air-water transfer of toxaphene congeners needs further study.

Accession: 002373087

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DOI: 10.1016/0045-6535(93)90399-p

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