Gulsen Tozsin, Inhibition of acid mine drainage and immobilization of heavy metals from copper flotation tailings using a marble cutting waste, Int. J. Miner. Metall. Mater., 23(2016), No. 1, pp. 1-6. https://doi.org/10.1007/s12613-016-1204-5
Cite this article as:
Gulsen Tozsin, Inhibition of acid mine drainage and immobilization of heavy metals from copper flotation tailings using a marble cutting waste, Int. J. Miner. Metall. Mater., 23(2016), No. 1, pp. 1-6. https://doi.org/10.1007/s12613-016-1204-5
Gulsen Tozsin, Inhibition of acid mine drainage and immobilization of heavy metals from copper flotation tailings using a marble cutting waste, Int. J. Miner. Metall. Mater., 23(2016), No. 1, pp. 1-6. https://doi.org/10.1007/s12613-016-1204-5
Citation:
Gulsen Tozsin, Inhibition of acid mine drainage and immobilization of heavy metals from copper flotation tailings using a marble cutting waste, Int. J. Miner. Metall. Mater., 23(2016), No. 1, pp. 1-6. https://doi.org/10.1007/s12613-016-1204-5
Acid mine drainage (AMD) with high concentrations of sulfates and metals is generated by the oxidation of sulfide bearing wastes. CaCO3-rich marble cutting waste is a residual material produced by the cutting and polishing of marble stone. In this study, the feasibility of using the marble cutting waste as an acid-neutralizing agent to inhibit AMD and immobilize heavy metals from copper flotation tailings (sulfide- bearing wastes) was investigated. Continuous-stirring shake-flask tests were conducted for 40 d, and the pH value, sulfate content, and dissolved metal content of the leachate were analyzed every 10 d to determine the effectiveness of the marble cutting waste as an acid neutralizer. For comparison, CaCO3 was also used as a neutralizing agent. The average pH value of the leachate was 2.1 at the beginning of the experiment (t = 0). In the experiment employing the marble cutting waste, the pH value of the leachate changed from 6.5 to 7.8, and the sulfate and iron concentrations decreased from 4558 to 838 mg/L and from 536 to 0.01 mg/L, respectively, after 40 d. The marble cutting waste also removed more than 80wt% of heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn) from AMD generated by copper flotation tailings.
Acid mine drainage (AMD) with high concentrations of sulfates and metals is generated by the oxidation of sulfide bearing wastes. CaCO3-rich marble cutting waste is a residual material produced by the cutting and polishing of marble stone. In this study, the feasibility of using the marble cutting waste as an acid-neutralizing agent to inhibit AMD and immobilize heavy metals from copper flotation tailings (sulfide- bearing wastes) was investigated. Continuous-stirring shake-flask tests were conducted for 40 d, and the pH value, sulfate content, and dissolved metal content of the leachate were analyzed every 10 d to determine the effectiveness of the marble cutting waste as an acid neutralizer. For comparison, CaCO3 was also used as a neutralizing agent. The average pH value of the leachate was 2.1 at the beginning of the experiment (t = 0). In the experiment employing the marble cutting waste, the pH value of the leachate changed from 6.5 to 7.8, and the sulfate and iron concentrations decreased from 4558 to 838 mg/L and from 536 to 0.01 mg/L, respectively, after 40 d. The marble cutting waste also removed more than 80wt% of heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn) from AMD generated by copper flotation tailings.
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