کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7475563 | 1485194 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings](/preview/png/7475563.png)
چکیده انگلیسی
Repparfjorden in northern Norway has been partly designated for submarine mine tailings disposal when the adjacent Cu mine re-opens in 2019. In order to increase sedimentation, the flocculant, Magnafloc10 is planned to be added to the mine tailings prior to discharge into the fjord. This study investigated the feasibility of reducing the Cu concentrations (375â¯mg/kg) in the mine tailings by applying electrodialytic extraction, including potential optimisation by adding Magnafloc10. In the acidic electrodialytic treatment (pHâ¯<â¯2), Magnafloc10 increased the extraction of Cu from the mine tailings particles from 76 to 86%, and the flocs with adsorbed metals were separated from the tailings solids by the electric field (1â¯mA/cm2). The electric energy consumption increased with the use of Magnafloc10 (from 17 to 30â¯kWh/g Cu extracted), due to lower conductivity in the liquid phase and clogging of the membrane by the flocs. In the alkaline electrodialytic treatment (pHâ¯>â¯12), Magnafloc10 reduced the extraction of Cu from 17% to 0.7%, due to the flocs remaining in the tailing slurries. The electric energy consumption per extracted Cu was similar in the acidic and alkaline electrodialytic treatments without the addition of Magnafloc10. In the alkaline electrodialytic treatment, the extraction of other metals was low (<2%), however longer treatment time is necessary to achieve similar Cu extraction as in the acidic electrodialysis. Depending on the target and timescale for treatment, acidic and alkaline electrodialysis can be employed to reduce the Cu concentration in the mine tailings thereby reducing the metal toxicity potential.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 224, 15 October 2018, Pages 130-139
Journal: Journal of Environmental Management - Volume 224, 15 October 2018, Pages 130-139
نویسندگان
Kristine B. Pedersen, Helena C. Reinardy, Pernille E. Jensen, Lisbeth M. Ottosen, Juho Junttila, Marianne Frantzen,