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TitleLake-sediment record of PAH, mercury, and fly-ash particle deposition near coal-fired power plants in Central Alberta
AuthorBarst, B D; Ahad, J M E; Rose, N; Jautzy, J J; Drevnick, P E; Gammon, P R; Sanei, H; Savard, M M
Source 2017, 1 pages
Year2017
Alt SeriesEarth Sciences Sector, Contribution Series 20160128
PublisherSociety of Environmental Toxicology and Chemistry
MeetingSETAC (Society of Environmental Toxicology and Chemistry); Orlando, FL; US; November 6-10
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceAlberta
AreaCentral Alberta; Hasse Lake; Wabamun Region
SubjectsHealth and Safety; surficial geology/geomorphology; deposition; atmospheric geochemistry; lake sediment cores; thermal electric power plants; mercury; pollutants; pollution; carbon isotopes; carbon nitrogen ratios; organic materials; organic carbon analyses; organic deposits; spheroidal carbonaceous particles (SCPs); polycyclic aromatic hydrocarbons (PAHs)
ProgramSources, Environmental Geoscience
LinksOnline - En ligne (full, complet)
AbstractWe report a historical record of atmospheric deposition in dated sediment cores from Hasse Lake, located near both current and previously operational coal-fired power plants in Central Alberta, Canada. The vertical distributions of spheroidal carbonaceous particles (SCPs), an unambiguous marker of anthropogenic atmospheric deposition, polycyclic aromatic hydrocarbons (PAHs), and mercury (Hg)
were measured to evaluate the extent of contamination related to the coal-fired power plants in the region. Total organic carbon, C/N and stable carbon (delta13C) and nitrogen (delta15N) isotope ratios of organic matter were determined to further examine anthropogenic inputs and changes in lake productivity over the past century. Accumulation rates of SCPs in the early part of the Hasse Lake record (pre-1955) compare well with the history of coal combustion to the east of the lake in the city of Edmonton, whereas accumulation rates in the latter part of the record (post-1955) suggest inputs from coal-fired power plants in the Wabamun Region to the west of the lake. Increasing accumulation rates of SCPs, PAHs, and Hg coincide with the period of peak pollution in the Wabamun Region to the west of the lake.
Changes in total organic carbon, C/N and stable carbon (delta13C) and nitrogen (delta15N) isotope ratios of organic matter indicate increases in lake productivity which may be related to anthropogenic atmospheric deposition.
Summary(Plain Language Summary, not published)
Spheroidal carbonaceous particles (SCPs), an unambiguous marker of high-temperature fossil-fuel combustion, polycyclic aromatic hydrocarbons (PAHs) and mercury (Hg) were measured in dated sediment cores from Hasse Lake, central Alberta, to evaluate temporal trends in atmospheric contamination related to the region's coal-fired power plants. Accumulation rates of SCPs in the early part of the record (pre-1955) compare well with the urban history of Edmonton to the east of the lake, whereas accumulation rates in the latter part of the record (post-1955) suggest inputs from coal-fired power plants in the Wabamun region to the west of the lake. Increasing accumulation rates of SCPs, PAHs, and Hg coincide with the period of peak pollution during the late 1960s and early 1970s in the Wabumun region.
GEOSCAN ID299066