Abstract Hemimorphite is an important zinc oxide mineral, but only a few studies have been conducted on the enhanced flotation recovery of hemimorphite with salicylhydroxamic acid (SHA) as the collector. In this study, the effect of Pb(II) on SHA adsorption on the hemimorphite surface with regard to its floatability was systematically studied. X-ray photoelectron spectroscopy (XPS) analysis showed that the Pb species could interact with O sites on the hemimorphite surface, thus forming Zn O Pb and Si O Pb complexes on the mineral surface and exhibiting strong reactivity toward SHA. Zeta potential measurements indicated that Pb2+ and Pb(OH)+ adsorbed onto the hemimorphite surfaces via physical and chemical adsorption within a pH range that was suitable for the flotation, further enhancing SHA adsorption on the activated mineral surface. Adsorption tests showed that more SHA adsorbed on the Pb-treated hemimorphite surface than on the untreated hemimorphite, and Pb-SHA complexes that were generated in the pulp solution could also adsorb on the surface of hemimorphite. Micro-flotation tests confirmed that the floatability of hemimorphite significantly increased after treatment with Pb(II) ions when SHA was used as the collector. Thus, this paper proposes a promising method of improving the flotation recovery of hemimorphite through via surface modification with Pb(II) ions.

中文翻译：

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Pb(II) 改性异极矿表面对水杨基异羟肟酸吸附的增强及其对可浮性的影响

摘要 异极矿是一种重要的氧化锌矿物，但对以水杨异羟肟酸（SHA）为捕收剂的异极矿提高浮选回收率的研究较少。在本研究中，系统研究了 Pb(II) 对异极矿表面 SHA 吸附及其可漂浮性的影响。X 射线光电子能谱 (XPS) 分析表明，Pb 物种可以与异极矿表面的 O 位点相互作用，从而在矿物表面形成 Zn O Pb 和 Si O Pb 配合物，并对 SHA 表现出强烈的反应性。Zeta 电位测量表明 Pb2+ 和 Pb(OH)+ 在适合浮选的 pH 范围内通过物理和化学吸附吸附到异极矿表面，进一步增强了活性矿物表面上的 SHA 吸附。吸附试验表明，与未处理的异极矿相比，Pb 处理的异极矿表面吸附了更多的 SHA，并且在矿浆溶液中产生的 Pb-SHA 配合物也可以吸附在异极矿表面。微浮选试验证实，当SHA用作捕收剂时，用Pb(II)离子处理后异极矿的可浮性显着提高。因此，本文提出了一种通过用 Pb(II) 离子进行表面改性来提高异极矿浮选回收率的有前途的方法。微浮选试验证实，当SHA用作捕收剂时，用Pb(II)离子处理后异极矿的可浮性显着提高。因此，本文提出了一种通过用 Pb(II) 离子进行表面改性来提高异极矿浮选回收率的有前途的方法。微浮选试验证实，当SHA用作捕收剂时，用Pb(II)离子处理后异极矿的可浮性显着提高。因此，本文提出了一种通过用 Pb(II) 离子进行表面改性来提高异极矿浮选回收率的有前途的方法。