Uncovering the roles of C-S-C group in improving the flotation performance of benzohydroxamic acid toward galena

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作   者：

Cao, Xiaoyu;  Huang, Xiaoping;  Zeng, Jianxian;  Zhang, Rui;  Zhong, Hong;  Cao, Zhanfang; 

作者机构：

Hunan Univ Sci & Technol;  Cent South Univ; 

关键词：

Flotation;  Molecular property;  Galena;  Hydroxamic acid;  Adsorption mechanism; 

期刊名称：

Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials

i s s n：

0169-4332

年卷期：

2023 年 608 卷 Jan.15 期

页   码：

1-8

页   码：

摘   要：

In this contribution, the roles of the thioether (C-S-C) group in improving the flotation performance of benzo-hydroxamic acid (BHA) toward galena were studied by density functional theory (DFT) calculation, adsorption experiments, zeta potential, surface energy measurements and X-ray photoelectron spectroscopy (XPS). It was found that the incorporation of C-S-C group was observed to increase the functional groups, chelating ability and hydrophobicity of BHA, thus enhance its flotation performance to galena. The adsorption mechanism analyses demonstrated that 2-(benzythio)-eacetohydroxamic acid (BTHA) molecule anchored on the galena surface mainly by the reactions of the two O atoms originated from -C(=O)-NH-OH group and lead species with the formation of a five-membered rings. Additionally, the C-S-C group in BTHA molecule could donate its electrons to lead species on galena surface, which was also helpful to the adsorption of BTHA on galena surface.