Selective Separation Behavior and its Molecular Mechanism of Cassiterite from Quartz using Cupferron as a Novel Flotation Collector with a Lower Dosage of Pb2+ Ions
发布时间：2021-05-13
点击次数：
影响因子：6.707
DOI码：10.1016/j.apsusc.2019.05.039
发表刊物：Applied Surface Science
关键字：Cassiterite; Quartz; Flotation; Cupferron; Pb2+ ion
摘要：Since the excessive dosage of Pb2+ ions could facilitate the gangue mineral quartz activation and cause serious environmental problems, this work has an attempt to examine the performance of cupferron as a new alternative collector in selective separation of cassiterite from quartz with low dose of Pb2+ ions. Microflotation results show the improved selectivity of cupferron towards cassiterite as compared to quartz. Accordingly, its selective adsorption mechanism has been investigated by zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analysis and first-principle density functional theory (DFT) calculations. The results of zeta potential measurements demonstrate the stronger adsorption of cupferron on cassiterite surface than quartz whether Pb2+ ion was added or not. The XPS analysis and first-principle DFT calculations consistently show that Sn4+ ions on the hydrated cassiterite surface exhibit much stronger reactivity towards cupferron adsorption than Si atoms on the hydrated quartz surface, resulting in a remarkable difference between the collecting ability of cupferron towards cassiterite and quartz. This work should shed new light on the discovery of cleaner flotation reagents for cassiterite beneficiation.
第一作者：田孟杰
论文类型：期刊论文
学科门类：工学
一级学科：矿业工程
文献类型：J
卷号：486
页面范围：228-238
是否译文：是
发表时间：2019-08-30
收录刊物：SCI
发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0169433219313455#f0040
附件：