文献类型：会议论文

英文题名：Adsorption of lithium ions on novel nanocrystal MnO₂

作者：Zhang, Qin-Hui; Sun, Shuying; Li, Shaopeng; Jiang, Hao; Yu, Jian-Guo

机构：[1]E China Univ Sci & Technol, Coll Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

会议论文集：19th International Symposium on Chemical Reaction Engineering (ISCRE 19)

会议日期：SEP, 2006

会议地点：Potsdam, GERMANY

语种：英文

外文关键词：adsorption; ion exchange; lithium; MnO2; nanostructure; separations

摘要：Various polymorphs of MnO2 were synthesized under a controlled hydrothermal method. The structure characteristics and ion exchangeability were studied by XRD, TEM, Li+ adsorption isotherm, kinetics and selectivity measurement. The MnO2 nanowires, mainly about 5 x 400nm in diameter and length, are found to have a remarkable lithium ion-sieve property with equilibrium distribution coefficients (K-d) in the order of Na+ < K+ < Mg2+ < Ca2+ << Li+, Li+ monolayer saturation amount of 2.43 mmol g(-1), and the first-order adsorption rate constant of 2.16 x 10(-6) s(-1), which is promising in the lithium extraction from brine or seawater. (c) 2007 Elsevier Ltd. All rights reserved.