Innovative discovery on the impact of hydration on the alternative flotation of smithsonite and calcite under benzohydroxamic acid system

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2024-11-06 DOI:10.1016/j.molliq.2024.126433

Yuanjia Luo, Wei Sun, Shuai He, Jian Peng, Feng Jiang

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引用次数: 0

Abstract

Currently, it is still lacking of deep understanding of the alternative of benzohydroxamic acid (BHA) on smithsonite and calcite flotation. We hypothesize that the presence of hydration films plays a significant role. Therefore, this paper aims to uncover the impact of hydration on the alternative flotation of smithsonite and calcite with BHA, utilizing flotation experiments, DFT calculations, Zeta potential tests, FTIR measurements, and XPS analyses. The results of the flotation experiments confirmed the effective separation of smithsonite from calcite with BHA. DFT calculations innovatively discovered that Zn on the surface of smithsonite can interact with BHA⁻ but the Ca on the surface of calcite was easier to interact with the H₂O instead of BHA⁻, thus BHA was incapable of repelling the hydrated layer from the surface of calcite to interact with the calcium ions. Zeta potential tests, FTIR measurements, and XPS analyses further provided experimental support that BHA was selectively chemically adsorbed onto the surface of smithsonite via forming Zn-BHA complex, whereas no such interaction occurred with the surface of calcite by generating Ca-BHA complex, which validated the DFT calculation results. This study provides valuable insights into the role of hydration in the beneficiation of smithsonite and calcite.

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水合作用对苯并羟肟酸体系下铁燧石和方解石替代浮选影响的创新发现

目前，人们还没有深入了解苯并羟肟酸（BHA）对铁石棉和方解石浮选的替代作用。我们推测，水化膜的存在起着重要作用。因此，本文旨在利用浮选实验、DFT 计算、Zeta 电位测试、傅立叶变换红外光谱测量和 XPS 分析，揭示水合作用对苯并羟肟酸（BHA）替代浮选铁燧岩和方解石的影响。浮选实验结果证实，使用 BHA 可以有效地从方解石中分离出铁燧石。DFT 计算创新性地发现，铁燧石表面的锌可以与 BHA- 发生作用，但方解石表面的钙更容易与 H2O 而不是 BHA- 发生作用，因此 BHA 无法将水化层从方解石表面排斥出去，从而与钙离子发生作用。Zeta 电位测试、傅立叶变换红外光谱测量和 XPS 分析进一步提供了实验支持，即 BHA 通过形成 Zn-BHA 复合物选择性地化学吸附在铁燧石表面，而通过生成 Ca-BHA 复合物与方解石表面没有发生这种相互作用，这验证了 DFT 计算结果。这项研究为水合作用在铁石棉和方解石选矿过程中的作用提供了宝贵的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.