Abstract Salicylhydroxamic acid (SHA) is a selective collector used in the separation of oxide minerals by flotation method, and it is commonly combined with Pb(II) to enhance the floatability of targeted minerals. Due to the limitation of analytical technique, a visualized method to depict the adsorption performance of lead species in the flotation of oxide minerals with SHA as collector was scarce. Time of flight secondary ion mass spectrometry (ToF-SIMS) is a valuable tool for chemical imaging of surfaces and depth profiling. In this work, ToF-SIMS with sputter depth profiling was used to visualize the activation mechanism of Pb(II) in SHA flotation of hemimorphite. Two activation models were proposed and verified. These models involved the adsorption of Pb(II) species onto the hemimorphite surface to improve the reactive sites, thereby enhancing the interaction of SHA. Simultaneously, Pb-SHA complexes in solutions would also adsorb onto the mineral surface, thereby increasing the distribution of lead species.

中文翻译：

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异极矿水杨异羟肟酸浮选中铅物质吸附的可视化研究

摘要 水杨基异羟肟酸(SHA)是一种选择性捕收剂，用于浮选法分离氧化物矿物，通常与Pb(II)结合以提高目标矿物的可浮性。由于分析技术的限制，以SHA为捕收剂的氧化物矿物浮选过程中，描述铅物种吸附性能的可视化方法很少见。飞行时间二次离子质谱 (ToF-SIMS) 是一种用于表面化学成像和深度分析的宝贵工具。在这项工作中，使用具有溅射深度分析的 ToF-SIMS 来可视化 Pb(II) 在异极矿 SHA 浮选中的激活机制。提出并验证了两种激活模型。这些模型涉及将 Pb(II) 物质吸附到异极矿表面以改善反应位点，从而增强 SHA 的相互作用。同时，溶液中的 Pb-SHA 复合物也会吸附到矿物表面，从而增加铅物种的分布。