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

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• 作者：Tingsheng Qiu ; ^{qiutingsheng@163.com} ; Yuanqing He ; Xianhui Qiu ; Xiuli Yang
• 关键词：Sphalerite ; Density functional theory ; Cyanide-leached ; Cu2+ activation
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2017
• 出版时间：25 January 2017
• 年：2017
• 卷：45
• 期：Complete
• 页码：307-315
• 全文大小：2693 K
• 卷排序：45

文摘

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.