Pathways of chemical recovery in acidified, metal-contaminated lakes near Sudbury, Ontario, Canada
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Abstract
This paper describes the recovery pathways of two lakes situated near the Coniston nickel-copper smelter. These lakes were exposed to very intense airborne pollution, including SO2, H2SO4, Ni and Cu, during the 60 year operation of the smelter. After the closure of the Coniston smelter in 1972 and the subsequent improvement in air quality, the water quality in both lakes began to improve. Despite their proximity and exposure to similar inputs, the lakes differed both in the rate and magnitude of recovery. This study demonstrates the capacity of lakes to recover from chemical stresses over a very short period. Changes in Cu and Ni concentration could be predicted, while changes in pH, measured as H+, could not. The reasons for this discrepancy as well as the processes and lake parameters that control chemical recovery are discussed.
Key words
acidification recovery copper nickel lake rate alkalinityPreview
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References
- Environment Canada: 1991, Summary of Weather for the Garson Weather Station.Google Scholar
- Gundermann, D. G., and Hutchinson, T.C.: 1993, International Conference Heavy Metals in the Environment Vol. 2:559–562. CEP Consultants. Ltd. Edinburgh.Google Scholar
- Havas, M.: 1990, Recovery of acidified and metal-contaminated lakes in Canada. IN Acidic Precipitation. 4. 293 pp.Google Scholar
- Hutchinson T.C. and Whitby, L.M.: 1974, Environ. Conser.1 (2): 123–132.Google Scholar
- Hutchinson, T.C. and Havas, M.: 1985, Water Air Soil Pollut. 28: 319–333.Google Scholar
- Hutchinson, T.C. and Stokes, P.M.: 1975, “Heavy metal toxicity and algal bioassays” water quality parameters. IN Am. Soc. Test. Mat. No. ASTM STP573 p. 320–333.Google Scholar
- Department of Transportation, Canada, Meterological Division: 1968, The climate of Northern Ontario. Climatological Studies No. 6., Toronto, 58 pp.Google Scholar
- National Research Council (U.S.): 1992, Restoration of Aquatic Ecosystems. National Academic Press. Washington. Eds. S. Maurizi and F. Poillon. 552 pp.Google Scholar
- Royal Ontario Nickel Commission: 1917, Report of the Royal Ontario Nickel Commission. A.T. Wilgress, Toronto. 584 pp.Google Scholar
- Woodfine, D.G., Mackay, D. and Havas M.: 1993, International Conference Heavy Metals in the Environment Vol. 2: 379–382. CEP Consultants. Ltd. Edinburgh.Google Scholar