Density functional theory and experimental studies of Cu2+ activation on a cyanide-leached sphalerite surface

Tingsheng Qiu; Yuanqing He; Xianhui Qiu; Xiuli Yang

Journal of Industrial and Engineering Chemistry, Vol.45, 307-315, January, 2017

DOI10.1016/j.jiec.2016.09.040 Export Citation

Density functional theory and experimental studies of Cu2+ activation on a cyanide-leached sphalerite surface

Tingsheng Qiu^†, Yuanqing He, Xianhui Qiu, and Xiuli Yang

Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Jiangxi 341000, China

E-mail:

Density functional theory calculations, flotation behavior, X-ray photoelectron spectroscopy, and infrared spectra were combined to reveal the Cu2+ activation mechanism on a cyanide (CN-)-leached sphalerite surface. Low CN- adsorption enhanced the activation capability of Cu2+ on the sphalerite surface, whereas the hydrophilicity of the sphalerite increased with increasing CN- coverage, which hindered Cu2 + adsorption. As the amount of chemically adsorbed Cu2+ on the sphalerite surface increased, Cu2+ began to desorb CN-, leading to the same result, which is consistent with the low CN- coverage.

Keywords:Sphalerite;Density functional theory;Cyanide-leached;Cu2+ activation

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[4] Wang W, Zhang J, Zou F, Gold, 25, 43 (2004)

[5] Cui X, Lu S, Multipurp. Util. Miner. Resour., 38 (2006)

[6] He Z, Zhao M, Wang H, Min. Metall., 25 (2003)

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[14] Chen JH, Lan LH, Chen Y, Miner. Eng., 46-47, 136 (2013)

[15] Long XH, Chen JH, Chen Y, Appl. Surf. Sci., 370, 11 (2016)

[16] Zhao CH, Huang DW, Chen JH, Li YQ, Chen Y, Li WZ, Miner. Eng., 95, 131 (2016)

[17] Chen JH, Li YQ, Lan LH, Guo J, J. Ind. Eng. Chem., 20(1), 268 (2014)

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[22] Payne MC, Teter MP, Allan DC, Arias TA, Joannopoulos JD, Rev. Mod. Phys., 64(4), 1045 (1992)

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[25] Chen Y, Chen J, Guo J, Acta Phys. Chim. Sin., 27, 363 (2011)

[26] Liu J, Wen SM, Chen XM, Bai SJ, Liu D, Cao QB, Miner. Eng., 46-47, 1 (2013)

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[29] Cheng L, Sun T, China Min. Mag., 94 (2011)

[30] Zhao H, Gu G, Multipurp. Util. Miner. Resour., 1 (2013)