Hemimorphite Flotation with 1-hydroxydodecylidene-1,1-diphosphonic acid and Its Mechanism
Hemimorphite Flotation with 1-hydroxydodecylidene-1,1-diphosphonic acid and Its Mechanism
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DOI：
10.3390/min8020038
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发表时间：
2018-01
期刊：
影响因子：
2.5
通讯作者：
W. Tan;Guangyi Liu;J. Qin;Hongli Fan
中科院分区：
文献类型：
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作者：
W. Tan;Guangyi Liu;J. Qin;Hongli Fan
合成了1-羟基十二烷叉-1，1-二膦酸（HDDPA），并首次应用于异极矿浮选。HDDPA对异极矿的浮选回收性能上级月桂酸，在pH 7.0 ~ 11.0范围内对石英具有良好的选择性。接触角结果表明，HDDPA更喜欢附着在异极矿表面，而不是石英，并促进异极矿表面的疏水性。在HDDPA阴离子的存在下，异极矿颗粒的zeta电位移动到更负的值，即使异极矿是带负电荷的，推断一个强大的化学吸附异极矿HDDPA。傅里叶变换红外光谱（FTIR）分析表明，HDDPA可能是通过其P（=O）-O基团中的氧原子与表面Zn（II）原子结合而锚在异极矿表面。X射线光电子能谱（XPS）给出了额外的证据表明，Zn（II）-HDDPA表面络合物形成异极矿。
1-hydroxydodecylidene-1,1-diphosphonic acid (HDDPA) was prepared and first applied in flotation of hemimorphite. HDDPA exhibited superior flotation performances for recovery of hemimorphite in comparison with lauric acid, and it also possessed good selectivity against quartz flotation under pH 7.0–11.0. Contact angle results revealed that HDDPA preferred to attach on hemimorphite rather than quartz and promoted the hydrophobicity of hemimorphite surfaces. In the presence of HDDPA anions, the zeta potential of hemimorphite particles shifted to more negative value even if hemimorphite was negatively charged, inferring a strong chemisorption of hemimorphite to HDDPA. The Fourier transform infrared (FTIR) recommended that HDDPA might anchor on hemimorphite surfaces through bonding the oxygen atoms of its P(=O)–O groups with surface Zn(II) atoms. X-ray photoelectron spectroscopy (XPS) gave additional evidence that the Zn(II)-HDDPA surface complexes were formed on hemimorphite.