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Leachate generation and nitrogen release fromsmall-scale rock dumps at the Kiruna iron ore mine
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2017 (English)In: Mine water and circular economy / [ed] Wolkersdorfer C, Sartz L, Sillanpää M, Häkkinen A, 2017, 140-146 p.Conference paper (Refereed)
Description
Abstract [en]

Two small-scale waste rock dumps have been constructed in Kiruna, Sweden to investigatethe dynamics of leachate generation and nitrogen release over the course of several years. The rockdumps have been constructed of low sulfur rock waste which is not acid generating. The results of thestudy indicate that, for the two years of this study, water is only discharged intermittently from therock dumps during snowmelt and during more intense rainfall events. During 2016, concentrationsof nitrate and ammonium in the discharge waters ranged up to 46 and 0.14 mg N/L, respectively. Theaverage leachate composition (n = 25) was pH 7.8, alkalinity 55 mg/L HCO3- and 1011 mg/L SO42-,which is quite similar to the composition of water in the clarification pond at the mine site.

Place, publisher, year, edition, pages
2017. 140-146 p.
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-329614OAI: oai:DiVA.org:uu-329614DiVA: diva2:1142445
Conference
International mine water association conference 2017, Lappeenranta, Finland
Funder
VINNOVA, 2014-01134
Available from: 2017-09-19 Created: 2017-09-19 Last updated: 2017-09-19

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