Adsorption mechanism of lead ions at ilmenite/water interface and its influence on ilmenite flotability
Adsorption mechanism of lead ions at ilmenite/water interface and its influence on ilmenite flotability
复制标题
铅离子在钛铁矿/水界面的吸附机理及其对钛铁矿可浮性的影响
DOI：
10.1016/j.jiec.2017.04.037
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发表时间：
2017-09-25
影响因子：
6.1
通讯作者：
Lai, Xiangsheng
中科院分区：
文献类型：
--
作者：
Chen, Pan;Zhai, Jihua;Lai, Xiangsheng
为了进一步了解铅离子在钛铁矿表面的吸附情况，采用了zeta电位分析、吸附密度计算、FT-IR和XPS分析等方法。结果表明，铅离子在钛铁矿表面的吸附是一个化学主导过程。铅物种与铁-羟基络合物相互作用形成Fe-O-Pb络合物。Pb（OL）（2）的疏水配合物也被观察到。铁离子和铅离子在钛铁矿表面的吸附是主要的活性中心，通过与油酸盐物种的化学吸附。引入铅离子作为表面改性手段可以有效地改善钛铁矿的可浮性。(C)2017年韩国工业和工程化学学会。Elsevier B. V.出版，保留所有权利。
In order to get further understanding of lead ions adsorption onto ilmenite surface, zeta potential analysis, adsorption density calculation, FT-IR and XPS analysis were employed. The results showed that the adsorption of lead ions onto ilmenite surface was a chemically dominating process. Lead species could interact with iron-hydroxyl complex compounds to form a Fe-O-Pb complex. The hydrophobic complex of Pb(OL)(2) was also observed. Iron and adsorbed lead ions on ilmenite surface served as the main active-sites via chemisorption with oleate species. Introducing lead ions, as a surface modification means, can efficiently improve ilmenite flotability. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.