N1,N10-dihydroxydecanediamide: Its separation performance and action mechanism for malachite, calcite and quartz

被引：5

作者：

Cheng C. ^{[1
]}

Wu J. ^{[2
]}

Huang Z. ^{[1
]}

机构：

[1] School of Resource and Environment Engineering, Jiangxi University of Science and Technology, Jiangxi, Ganzhou

[2] Teaching and Research Support Center, PLA Army Academy of Artillery and Air Defense, Hefei

来源：

Journal of Molecular Liquids | 2024年 / 407卷

基金：

中国国家自然科学基金;

关键词：

Adsorption; Calcite; Flotation; Malachite; N[!sup]1[!/sup; N[!sup]10[!/sup]-dihydroxydecanediamide; Quartz;

D O I：

10.1016/j.molliq.2024.125190

中图分类号：

学科分类号：

摘要：

In this study, a novel collector, N1,N10-dihydroxydecanediamide (DHH) was synthesized in our lab and introduced in flotation of malachite ore. The separation performance and action mechanism of DHH were explored and compared with octyl hydroxamic acid (OHA). The results of single mineral flotation tests indicated that DHH exhibited a stronger collecting ability to malachite and better selectivity against quartz and calcite than OHA, and floated out 94 % malachite, 8.5 % quartz and 17 % calcite at pH = 10 with a collector concentration of 60 mg/L. The FTIR spectra, zeta-potential tests and XPS tests proved that DHH could absorb onto malachite surface though a chemical mode. DFT calculation results showed that DHH anion owned a stronger affinity to malachite than DHH molecular and OHA anion/molecular, and its bis-minerophilic groups could form C(=O)NHO-Cu bond with surface Cu atom. It exhibited that DHH was an excellent candidate and capable for high efficiency flotation of malachite ore. © 2024 Elsevier B.V.

引用

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