Surface modification of hemimorphite with lead ions and its effect on flotation and oleate adsorption
Surface modification of hemimorphite with lead ions and its effect on flotation and oleate adsorption
复制标题
铅离子表面改性异极矿及其对浮选和油酸吸附的影响
DOI：
10.1016/j.apsusc.2019.04.038
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发表时间：
2019-07
影响因子：
6.7
通讯作者：
Qicheng Feng
中科院分区：
文献类型：
--
作者：
Wenjuan Zhao;Dianwen Liu;Shuming Wen;Qicheng Feng
本文提出使用铅离子对异极矿进行表面改性，作为以油酸钠作为捕收剂提高其浮选回收率的一种有前途的方法。铅改性异极矿的可浮性显着提高，在5×10−5mol/L油酸钠存在下，铅离子存在下异极矿的浮选回收率高达90.3%。 Zeta电位实验结果表明，铅离子能够以Pb2+和Pb(OH)+的形式吸附在异极矿表面，吸附的铅物种在pH<8.5时使异极矿表面带正电，除了化学吸附外，还促进带负电的捕收剂与矿物表面的静电相互作用。 XPS测量表明，O原子是异极矿表面与铅离子相互作用的反应位点，它以单键Zn单键O、单键单键O和单键OH形态存在于异极矿表面。异极矿表面的O原子通过静电相互作用和化学吸附与浮选矿浆中的Pb2+和Pb(OH)+相互作用，形成新的活性产物，即单键O单键Pb配合物，大大增加了异极矿表面的反应位点数量。矿物表面吸附的铅物种对油酸钠表现出较强的反应性，因此在异极矿表面形成更多的疏水物种，从而增强了异极矿的可浮性。
This paper proposed the surface modification of hemimorphite using lead ions as a promising method for increasing its flotation recovery with sodium oleate as collector. The floatability of lead-modified hemimorphite was significantly improved and the flotation recovery of hemimorphite in the presence of lead ions reached up to 90.3% at 5 × 10−5mol/L sodium oleate. The experimental results of zeta potential showed that lead ions could adsorb on the hemimorphite surface in the form of Pb2+and Pb(OH)+, and the adsorbed lead species rendered the hemimorphite surface positively charged at pH < 8.5, facilitating the electrostatic interaction of the negatively charged collector with the mineral surface in addition to chemical adsorption. XPS measurement revealed that O atoms were the reactive sites on the hemimorphite surface interacted with lead ions, and it existed on the hemimorphite surface in the form of single bondZnsingle bondO, single bondSisingle bondO and single bondOH species. O atoms on the hemimorphite surface interacted with Pb2+and Pb(OH)+in the flotation pulp to form a new active product, i.e., single bondOsingle bondPb complex through electrostatic interaction and chemical adsorption, which greatly increased the number of reactive sites on the hemimorphite surface. The adsorbed lead species on the mineral surface exhibited strong reactivity towards sodium oleate, so more hydrophobic species were formed on the hemimorphite surface, thus enhancing the floatability of hemimorphite.
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影响因子：
4.8
作者：
Kai Jia;Q. Feng;Guofan Zhang;Qing Shi;Ziyong Chang
通讯作者：
Kai Jia;Q. Feng;Guofan Zhang;Qing Shi;Ziyong Chang
影响因子：
2.5
作者：
W. Tan;Guangyi Liu;J. Qin;Hongli Fan
通讯作者：
W. Tan;Guangyi Liu;J. Qin;Hongli Fan
影响因子：
4.8
作者：
Cheng Liu;Q. Feng;Guofan Zhang
通讯作者：
Cheng Liu;Q. Feng;Guofan Zhang
影响因子：
4.8
作者：
Qicheng Feng;S. Wen;X. Bai;Wei-Chian Chang;Cui Chuanfa-;Wen-juan Zhao
通讯作者：
Qicheng Feng;S. Wen;X. Bai;Wei-Chian Chang;Cui Chuanfa-;Wen-juan Zhao
影响因子：
13.6
作者：
Sethurajan, Manivannan;Huguenot, David;van Hullebusch, Eric D.
通讯作者：
van Hullebusch, Eric D.