期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 447, 期 -, 页码 337-344出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2012.12.097
关键词
Alberta oil sands; Metals; Paleolimnology; Soil contamination; Airborne contamination
资金
- Health Canada's National First Nations Environmental Contaminants Program
- Natural Sciences and Engineering Research Council of Canada
The extraction of oil sands by in-situ methods in Alberta has expanded dramatically in the past two decades and will soon overtake surface mining as the dominant bitumen production process in the province. While concerns regarding regional metal emissions from oil sand mining and bitumen upgrading have arisen, there is a lack of information on emissions from the in-situ industry alone. Here we show using lake sediment records and regionally-distributed soil samples that in the absence of bitumen upgrading and surface mining, there has been no significant metal (As, Cd, Cu, Hg, Ni, Pb, V) enrichment from the Cold Lake in-situ oil field. Sediment records demonstrate post-industrial Cd, Hg and Pb enrichment beginning in the early Twentieth Century, which has leveled off or declined since the onset of commercial in-situ bitumen production at Cold Lake in 1985. (C) 2013 Elsevier B.V. All rights reserved.
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