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Weathering mechanisms and composition of effluents from a sulphide mine waste deposit after covering: twenty years of field data
Örebro universitet, Akademin för naturvetenskap och teknik.
Örebro universitet, Akademin för naturvetenskap och teknik.ORCID-id: 0000-0002-2104-4593
Örebro universitet, Akademin för naturvetenskap och teknik.ORCID-id: 0000-0002-2674-4994
2010 (engelsk)Inngår i: Mine water and innovative thinking: proceedings 2010 / [ed] Christian Wolkersdorfer, Antje Freund, Nova Scotia, Canada: Cape Breton, University Press , 2010, s. 359-362Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In 1988 a deposit with some 500,000 m³ of coarse sulphidic mine waste at Bersbo, Sweden, was covered with compacted illitic clay or cement stabilised coal fly-ash (CeFill) to prevent  eathering and the transport of metals. Theoretically, oxidation of pyrite would give a sulphate/iron ratio in solution exceeding 2, if oxygen is the electron acceptor, but below 2 if Fe(III) is the oxidizing agent. The effluents had ratios of 35—50 and 2—0.8 before and after covering, respectively, why it is concluded that weathering continued. The altered hydrological regime contributes to changes in metal concentrations in the surrounding surface water.

sted, utgiver, år, opplag, sider
Nova Scotia, Canada: Cape Breton, University Press , 2010. s. 359-362
Emneord [en]
Sulphidic mine waste, weathering, Fe(III), Fe(II)
HSV kategori
Forskningsprogram
Kemi
Identifikatorer
URN: urn:nbn:se:oru:diva-24260ISI: 000323234800082ISBN: 978-1-897009-47-5 (tryckt)OAI: oai:DiVA.org:oru-24260DiVA, id: diva2:543018
Konferanse
International Mine Water Association symposium: Mine Water and Innovative Thinking (IMWA), Sydney, Nova Scotia, Canada, Sep. 05-09, 2010
Tilgjengelig fra: 2012-08-06 Laget: 2012-08-06 Sist oppdatert: 2017-10-18bibliografisk kontrollert

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Karlsson, StefanAllard, BertBäckström, Mattias

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