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Stabilization of acid generating waste rock with fly ash: Immobilization of arsenic under alkaline conditions
Örebro University, School of Science and Technology. (Forskningscentrum Människa-Teknik-Miljö)ORCID iD: 0000-0002-2674-4994
Örebro University, School of Science and Technology. Bergskraft Bergslagen AB, Kopparberg, Sweden.
2010 (English)In: Mine water & innovative thinking: proceedings 2010 / [ed] Wolkersdorfer, C. and Freund, A., ovaScotia, Canada: Cape Breton University Press , 2010, p. 555-558Conference paper, Published paper (Refereed)
Abstract [en]

A fly ash was used to increase pH and decrease arsenic leaching from an acidic mine waste.Both the amended system as well as the control system was leached with ultra pure water. pH in thecontrol increased from 1.7 to 2.7 at the end of the experiment while the pH in the amended systemdecreased from 12.6 to 11.5. compared to the control the initial concentrations of arsenic decreasedwith almost three orders of magnitude in the amended systems. A combination of co precipita-tion with iron and calcium arsenate precipitation were identified as the major arsenic immobi-lization mechanisms.

Place, publisher, year, edition, pages
ovaScotia, Canada: Cape Breton University Press , 2010. p. 555-558
Keywords [en]
Wood ash, arsenic, acidic mine waste
National Category
Geochemistry
Research subject
Enviromental Science
Identifiers
URN: urn:nbn:se:oru:diva-30870ISI: 000323234800129ISBN: 978-1-897009-47-5 (print)OAI: oai:DiVA.org:oru-30870DiVA, id: diva2:649567
Conference
International Mine Water Association symposium: Mine Water and Innovative Thinking (IMWA), Sydney, Nova Scotia, Canada, Sep. 05-09, 2010
Available from: 2013-09-19 Created: 2013-09-19 Last updated: 2017-10-18Bibliographically approved

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Bäckström, MattiasSartz, Lotta

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