文献类型：期刊文献

英文题名：Enhancement of Lithium Extraction from Low Grade Brines by High Hydrophilic Blend Membrane Using Mno2 Ion Sieve as Adsorbents

作者：Bao, Luri[1]; Sun, Shu-Ying[1]; Xu, Zhengguo[1]; Lin, Sen[1]

机构：[1] National Engineering Research Center for Integrated Utilization of Salt Lake Resource, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230136841)

语种：英文

外文关键词：Adsorption - Blending - Chlorine compounds - Compressive strength - Desorption - Extraction - Ions - Lithium - Manganese oxide - Membranes - Sieves

摘要：In this study, an MnO2 ion sieve blend membrane with high hydrophilicity was developed to stength the lithium extraction from high Mg/Li ratio brines instead of the traditional adsorbent granulation procedure. The membrane-type adsorbent has the advantages of high stability and high water permeability. That can avoid column methods and do not require high pressure because adsorption modules can be easily constructed by stacking or winding membranes. Therefore, membrane-type adsorbents is suitable for large-scale applications. It was confirmed that the adsorption rate and hydrophilicity of the membrane were negatively related to the increasing PVC content, while the tensile and compressive strengths could be maximized with a blending ratio of Polyvinyl chloride (PVC) and Polyacrylonitrile (PAN) (10:1). The role of solvent concentration on the adsorption performance was diametrically opposite in the high concentration range and low concentration range. Besides, the optimized membrane with spongy porosities demonstrated a large flux and great adsorption performance for Li+ in the Qarham Salt Lake old brine. The lithium adsorption capacity could keep at 2800 mg/m2 and the desorption rate always exceeded 85% in the multicycle adsorption-desorption experiments,which indicates the long-term stability of this membrane-type adsorbent. ? 2023, The Authors. All rights reserved.