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dc.contributor.authorLu, Jinmei
dc.contributor.authorWalder, Ingar
dc.contributor.authorLeiviskä, Tiina
dc.date.accessioned2022-01-31T08:56:16Z
dc.date.available2022-01-31T08:56:16Z
dc.date.issued2021-10-29
dc.description.abstractTemperature is an important factor affecting the leaching of contaminants from waste deposits, especially in the Nordic region where temperature change is more drastic than other areas. In this study, the impact of temperature variation in the leaching of sulphate, Co, Fe, Mn, Ni and Zn from the Ballangen tailings deposit, northern Norway, was investigated using a column leaching experiment. Unoxidized tailings were fed into four columns, which were subsequently put into four wine fridges set at 5, 10, 14 and 18 °C, respectively. The columns were filled with 600 mL of deionized water from the top every second week. Leachate was collected at the bottom and tested for pH, conductivity and concentrations of SO<sup>2 </sup <sub>4</sub> , Co, Fe, Mn, Ni and Zn. The saturation index for ferrihydrite and the activity of Fe<sup>2+</sup> in the leachate were calculated with PHREEQC. The results showed that the conductivity and leachate concentrations of SO<sup>2 </sup> <sub>4</sub> , Co, Fe, Mn and Ni were highest at 14 and 18 °C, and lowest at 5 °C, which showed high tailings oxidation and subsequent leaching of contaminants at higher temperatures. X-ray photoelectron spectroscopic (XPS) analysis of the residual material confirmed the oxidation of sulphides and leaching of many elements. Ferrihydrite was supersaturated in the leachate from the 14 and 18 °C columns, which showed the oxidation of pyrrhotite and olivine and the precipitation of ferrihydrite. The cumulative mass of Zn leached out was highest at 10 °C, which might be the threshold temperature for the leaching of Zn.en_US
dc.identifier.citationLu, Walder, Leiviskä. Impact of temperature on the leaching of sulphate, Co, Fe, Mn, Ni and Zn from the Ballangen tailings deposit, Norway: A laboratory column experiment. Journal of Water and Climate Change. 2021;12(8):3558-3572en_US
dc.identifier.cristinIDFRIDAID 1976213
dc.identifier.doi10.2166/wcc.2021.058
dc.identifier.issn2040-2244
dc.identifier.urihttps://hdl.handle.net/10037/23839
dc.language.isoengen_US
dc.publisherIWA Publishingen_US
dc.relation.journalJournal of Water and Climate Change
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.titleImpact of temperature on the leaching of sulphate, Co, Fe, Mn, Ni and Zn from the Ballangen tailings deposit, Norway: A laboratory column experimenten_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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