Geochemical Behaviour of Submerged Pyrite-Rich Tailings in Canadian Lakes

Pedersen, Thomas F.; McNee, J.Jay; Flather, David; Mueller, Bert; Pelletier, Clem

doi:10.1007/978-3-642-71954-7_6

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Submerged tailings often serve as a sink to trace metals (Pedersen et al, 1998), the remobilization of which is sometimes explained in terms of redoxcontrolled dissolution of the sorbing Fe and Mn oxide phases (Martin and Pedersen, 2002) or release from decaying organic matter (Martin et al, 2001). The results of our sorption studies with submerged tailings from the Farr and Mill Creeks (detailed in Section 5.3), on the other hand, suggest that the deposited tailings are a source rather than a sink for As in the historic Cobalt mining district.…”

Section: Submerged Tailings As a Source Of Arsenic In The Farr Creek mentioning

confidence: 99%

Transformation and mobilization of arsenic in the historic Cobalt mining camp, Ontario, Canada

Kwong

Beauchemin

Hossain

et al. 2007

Journal of Geochemical Exploration

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Section: Submerged Tailings As a Source Of Arsenic In The Farr Creek mentioning

confidence: 99%

Transformation and mobilization of arsenic in the historic Cobalt mining camp, Ontario, Canada

Kwong

Beauchemin

Hossain

et al. 2007

Journal of Geochemical Exploration

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“…Possible disposal sites are numerous and readily available there, and annual precipitation exceeds evaporation (Pedersen et al 1998). Possible disposal sites are numerous and readily available there, and annual precipitation exceeds evaporation (Pedersen et al 1998).…”

Section: Wet Coversmentioning

confidence: 99%

Mine Wastes

Lottermoser

2010

346

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“…For many mining operations on the Canadian Shield, natural lakes have been used as polishing ponds for tailings-pond overflow and treated effluents and, in some cases, as repositories for direct inputs of mill tailings and treatment products ( − ). During the operational stage of a mine, water quality in such lakes is typically dominated by the composi tion of aqueous effluents discharged to the lake (i.e., tailings supernatant) and not by the dissolution of solid phases.…”

Section: Introductionmentioning

confidence: 99%

Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada)

Martin

Jambor

Pedersen

et al. 2003

Environ. Sci. Technol.

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The post-depositional behavior of Cu in a gold-mining polishing pond (East Lake, Canada) was assessed after mine closure by examination of porewater chemistry and mineralogy. The near-surface (upper 1.5 cm) sediments are enriched in Cu, with values ranging from 0.4 to 2 wt %. Mineralogical examination revealed that the bulk of the Cu inventory is present as authigenic copper sulfides. Optical microscopy, energy-dispersion spectra, and X-ray data indicate that the main Cu sulfide is covellite (CuS). The formation of authigenic Cu-S phases is supported by the porewater data, which demonstrate that the sediments are serving as a sink for dissolved Cu below sub-bottom depths of 1-2 cm. The zone of Cu removal is consistent with the occurrence of detectable sulfide and the consumption of sulfate. The sediments can be viewed as a passive bioreactorthat permanently removes Cu as insoluble copper sulfides. This process is not unlike that which occurs in other forms of bioremediation, such as wetlands and permeable reactive barriers. Above the zone of Cu removal, dissolved Cu maxima in the interfacial porewaters range from 150 to 450 microg L(-1) and reflect the dissolution of a Cu-bearing phase in the surface sediments. The reactive phase is thought to be a component of treatment sludges delivered to the lake as part of cyanide treatment. Flux calculations indicate that the efflux of dissolved Cu from the sediments to the water column (14-51 microg cm(-2) yr(-1)) can account for the elevated levels of dissolved Cu in lake waters (approximately 50 microg L(-1)). Implications for lake recovery are discussed.

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Geochemical Behaviour of Submerged Pyrite-Rich Tailings in Canadian Lakes

Cited by 4 publications

References 15 publications

Transformation and mobilization of arsenic in the historic Cobalt mining camp, Ontario, Canada

Transformation and mobilization of arsenic in the historic Cobalt mining camp, Ontario, Canada

Mine Wastes

Post-Depositional Behavior of Cu in a Metal-Mining Polishing Pond (East Lake, Canada)

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