期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 4, 期 4, 页码 3788-3796出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2016.08.024
关键词
Silica sol-gel materials; Bifunctional ionic liquids; Trioctylmethylammonium 1-phenyl-3-methyl-4-benzoylpyrazol-5-onate; Adsorption; Lanthanides; Scandium
资金
- Ministry of Education and Science of the Russian Federation within the Increase Competitiveness Program of NUST MISiS [K1-2014-026]
- Russian Foundation for Basic Research [13-02-00777]
Sol-gel processed silica doped with a novel bifunctional ionic liquid, trioctylmethylammonium 1-phenyl-3-methyl-4-benzoylpyrazol-5-onate ([A336](+)[L](-)), was prepared and used as a sorbent for recovery and separation of scandium and lanthanides from nitric acid solutions. The effect of HNO3 concentration in the aqueous phase on the adsorption of microquantities of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu is considered. A significant synergistic effect was observed for scandium and lanthanide adsorption from aqueous solutions. Sc(III) is sorbed from aqueous solutions much better than lanthanides(III) and separation of Sc(III) from lanthanides(III) can be achieved by simple adjusting acidity of the aqueous phase. The efficiency of lanthanide(III) adsorption from low-concentration HNO3 solutions increases with an increasing atomic number. The process of lanthanide(III) adsorption is exothermic, spontaneous and follows a pseudo-second-order kinetic model. The potentialities of the doped silica material for the preconcentration of lanthanides(III) and Sc(III) from nitrate solutions are demonstrated. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据