Blar i forfatter Artikler, rapporter og annet (teknologi og sikkerhet) "Walder, Ingar"
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The effect of temperature and digested sewage sludge cover over tailings on the leaching of contaminants from Ballangen tailings deposit
Lu, Jinmei; Leiviska, Tiina; Walder, Ingar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-28)Dry covers can be applied above tailings to reduce and prevent formation of acid mine drainage and leaching of contaminants. Efficiency of covers is affected by different parameters, of which temperature change under climate change context is one. Here, a laboratory column leaching experiment was performed under four temperatures, 5, 10, 14, and 18 °C on unoxidized tailings from Ballangen, Norway. ... -
Effect of temperature on the leaching of heavy metals from nickel mine tailings in the arctic area, Norway
Fu, Shuai; Lu, Jinmei; Walder, Ingar; Wu, Daishe (Journal article; Tidsskriftartikkel; Peer reviewed, 2023)The leaching of heavy metals from tailings deposit due to the oxidation of sulphidic tailings and formation of acidic leachate is considered a high risk to the surrounding environment. Temperature plays an important role in the leaching of heavy metals from tailings in changing acid-based environment, especially in the Arctic area. To investigate how the temperature variation affected metal release ... -
Impact of temperature on the leaching of sulphate, Co, Fe, Mn, Ni and Zn from the Ballangen tailings deposit, Norway: A laboratory column experiment
Lu, Jinmei; Walder, Ingar; Leiviskä, Tiina (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-29)Temperature 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. ...