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Secondary copper enrichment in tailings at the Laver mine, northern Sweden
Luleå tekniska universitet.
Luleå tekniska universitet.
Analytica AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
1999 (English)In: Environmental Geology, ISSN 0943-0105, E-ISSN 1432-0495, Vol. 38, no 4, p. 327-342Article in journal (Refereed) Published
Abstract [en]

Field and laboratory studies of the sulphide-bearing tailings at Laver, northern Sweden, show that the present release of metals from the tailings is low, especially with regard to Cu. A large part of the Cu released by sulphide oxidation is enriched in a distinct zone just below the oxidation front. The enrichment zone occurs almost all over the tailings area except in areas with a shallow groundwater table. The Cu enrichment is caused by formation of covellite and adsorption onto mineral surfaces. The transport of Zn, Co, Cd, Ni and S seems to be controlled mainly by adsorption. No secondary zone or secondary minerals containing these metals have been found. Just below the groundwater table, metals are released into solution when the enrichment zone reaches the groundwater due to the low pH. An increased release of metals, especially Cu, can be expected in the future, since the enrichment zone is moving towards the groundwater table.

Place, publisher, year, edition, pages
1999. Vol. 38, no 4, p. 327-342
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-9749DOI: 10.1007/s002540050430Local ID: 86b64140-a16d-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-9749DiVA, id: diva2:982687
Note
Godkänd; 1999; 20070111 (bajo)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Öhlander, Björn

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