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- Title
Fractionation and Aqueous Speciation of Zinc in a Lake Polluted by Mining Activities, Flin Flong, Canada.
- Authors
Evans, L. J.
- Abstract
The concentrations of zinc in Ross Lake, a small, relatively shallow lake adjacent to the Hudson Bay Mining and Smelting Company smelter in Flin Flon, Manitoba, Canada, have risen recently to levels that may soon approach environmental concern. Six locations were sampled, five sites in Ross Lake and one site in Flin Flon Creek and sampling occurred in four sampling dates. Water was collected from two sampling depths, together with a sample of the underlying sediment. Aqua regia extraction of the sediments dissolved large amounts of both zinc and sulphur, averaging 28 800 mg kg-1 for zinc and 40 700 for sulphur. Much smaller amouns of Zn occurred in organic, 266 mg kg-1, and specifically adsorbed forms, 192 mg kg-1. X-ray diffraction analysis confirmed the presence of sphalerite, ZnS, in the sediments. Average contents of Zn in the waters for the four sampling dates were 838 μg L-1, 572 μg L-1, 619 μg L-1 and 222 μg L-1. Aqueous speciation calculations indicated that the predominant species present in oxygenated waters were ZnSO04, ZnL0, Zn(OH)02 and ZnCO03 and that ZnS(HS)- was the predominant species at the sediment/water interface.
- Subjects
MANITOBA; ZINC; WATER pollution; LAKES; MINES &; mineral resources; ENVIRONMENTAL sampling; SEDIMENTS; X-ray diffraction
- Publication
Water, Air & Soil Pollution, 2000, Vol 122, Issue 3-4, p299
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/A:1005234831526