文献类型：期刊文献

英文题名：Performance of a synthetic resin for lithium adsorption in waste liquid of extracting aluminum from fly-ash

作者：Xu, Zhengguo[1];Wang, Xiaochong[1];Sun, Shuying[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China

年份：2022

卷号：44

起止页码：115

外文期刊名：CHINESE JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20221311873606);WOS:【SCI-EXPANDED(收录号:WOS:000788483300011)】；

基金：The research was supported by National Key Research and Development Program of China (2017YFB0603104) and Sponsored by Shanghai Pujiang Program (2019PJD011).The authors also gratefully acknowledge the financial support from the State Key Laboratory of Green Chemistry Synthesis Technology (Zhejiang University of Technology, Hangzhou 310032).

语种：英文

外文关键词：Adsorption; Wastewater treatment; Lithium; Utilization of fly- ash

摘要：In this study, we investigated the performance of a synthetic resin for the adsorption of Li from predesilicated solution which is the waste liquid produced by extracting aluminum from fly ash. The adsorption kinetics and isotherms of the resin were obtained and analyzed. The saturated adsorption sites of the resin were in agreement with the quasi-second-order kinetic model. Then, the pore diffusion model (PDM) was applied to represent the lithium adsorption kinetics which confirming that the external mass is the limiting step. Moreover, we evaluated the adsorption properties of this resin in fixed-bed mode. We established a feasible extraction process for Li from strong alkaline solutions with low Li concentrations. The process parameters, such as the flow rate, initial adsorption solution concentration, water washing process, desorption agent concentration, and flow rate were studied. The desorption rate of the Li+ ions was directly proportional with the concentration of the desorption agent. The time required to accumulate Li decreased as the hydrochloric acid concentration and flow rate increased. Time of the peak appeared increased from 0.5 BV to 2.5 bed volume (BV) as the concentration was increased from 1 to 3 mol.L-1, and the peak increased from 231 to 394 mg.L-1 . The resin presented good selectivity for Li+ ions and could effectively separate impurity ions from the pre-desilication solution. (C) 2021 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.