Investigation of Mg^2＋/Li^＋ Separation by Nanofiltration  

作　　者：YANG Gang SHI Hong LIU Wenqiang XING Weihong XU Nanping 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

出　　处：《Chinese Journal of Chemical Engineering》2011年第4期586-591,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （20576052）; the Joint Innovation Fund of Jiangsu Province （BY2009107）

摘　　要：The Mg2+/Li+/Cl solutions were filtrated with a commercially available DK nanofiltration membrane to investigate the possibility to enrich the lithium component.The investigation was significant as such an approach might be a competing substitute for the present lithium purification industry and the environmental protection purpose.The Donnan steric pore model(DSPM) was implemented for the prediction.The separation of Mg2+/Li+was mainly affected by the working pressure(or the permeation flux) and a limiting separation factor was found around 0.31.The effective membrane charge density was evaluated and its dependence on the permeation flux as well as the ion pattern was discussed.For predicting an actual separation of electrolytes,the experimental investigation seems necessary for the reliability and efficiency.The Mg2＋/Li＋/Cl solutions were filtrated with a commercially available DK nanofiltration membrane to investigate the possibility to enrich the lithium component.The investigation was significant as such an approach might be a competing substitute for the present lithium purification industry and the environmental protection purpose.The Donnan steric pore model（DSPM） was implemented for the prediction.The separation of Mg2＋/Li＋was mainly affected by the working pressure（or the permeation flux） and a limiting separation factor was found around 0.31.The effective membrane charge density was evaluated and its dependence on the permeation flux as well as the ion pattern was discussed.For predicting an actual separation of electrolytes,the experimental investigation seems necessary for the reliability and efficiency.

关 键 词：NANOFILTRATION lithium recovery DSPM model separation factor 

分 类 号：TQ028.8[化学工程] TG146.21[一般工业技术—材料科学与工程]