Jiangxi Provincial Key Laboratory of Mining Engineering, Ganzhou, Jiangxi 341000, China.
School of Resource and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China.
Langmuir. 2023 Apr 25;39(16):5936-5943. doi: 10.1021/acs.langmuir.3c00584. Epub 2023 Apr 16.
The hydroxylamine method involves the synthesis of a new hydroxamic acid collector, i.e., phenylpropyl hydroxamic acid (PHA), from methyl cinnamic hydroxamic acid. Flotation test results show that PHA exhibits good selective collection ability. The adsorption mechanism of PHA is investigated using the zeta potential, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results show that PHA formed a new Ca-O bond with Ca on the fluorite surface via chemical adsorption. A new five-element chelated hydroxamate group may have formed in Ca on the fluorite surface. The PHA selectivity is fully explained via density functional theory (DFT) calculations, and an adsorption model is established.
羟胺法涉及从肉桂酸甲酯合成一种新的羟肟酸捕收剂，即苯丙基羟肟酸（PHA）。浮选试验结果表明，PHA 表现出良好的选择性捕收能力。通过动电位、傅里叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）研究了 PHA 的吸附机理。结果表明，PHA 通过化学吸附在萤石表面与 Ca 形成新的 Ca-O 键。萤石表面的 Ca 上可能形成了新的五元素螯合羟肟酸基团。通过密度泛函理论（DFT）计算充分解释了 PHA 的选择性，并建立了吸附模型。
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