Novel insights into adsorption mechanism of benzohydroxamic acid on lead (II)-activated cassiterite surface: An integrated experimental and computational study
发布时间：2022-05-01
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影响因子：4.765
DOI码：10.1016/j.mineng.2018.04.012
发表刊物：Minerals Engineering
关键字：Cassiterite; Flotation; Adsorption mechanism; Density functional theory; First-principle calculations
摘要：Using microflotation experiments, this study investigated the effect of Pb2+ ions on flotation performance of cassiterite (SnO2) by using benzohydroxamic acid (BHA) as collector. Flotation results showed that floatability of cassiterite significantly improved after addition of Pb2+ ion to the process. Adsorption behaviour and mechanism of BHA on the inactivated and Pb-activated cassiterite surface were further explored by adsorption experiments, zeta potential measurements, X-ray photoelectron spectroscopy analysis and first-principle density functional theory calculations. Experimental and computational results consistently suggested that the adsorbed Pb atoms can coordinate with two O atoms of the two hydroxyl groups on the cassiterite surface. BHA molecules can form two coordination bonds with one Pb ion adsorbed on the cassiterite surface, resulting in a five-membered chelating ring. The proposed adsorption mechanism can be extended to the vast majority of interface assembly systems.
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：122
页面范围：327-338
是否译文：否
发表时间：2018-06-15
收录刊物：SCI
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