膜科学与技术

Position：Home >> Abstract

Preparation of nanofiltration membranes with dually charged separation layer for Mg2+/Li+ separation

Authors： MIAO Shanshan, SHI Le, SONG Ziping, SHE Jingguo, CHEN Xiaole, WU Chunrui, LYU Xiaolong

Units： State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tian jin 300387, P. R. China

KeyWords： nanofiltration membrane, N-aminoethyl piperazine, trimesoyl chloride, Mg2+/Li+ separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2023,43(4):37-43

Abstract：

In recent years, with the rapid development of new energy materials, the demand for lithium has risen dramatically. To meet the increasing demand for lithium, it has become a trend to use nanofiltration technology to extract lithium from the salt lake. The Mg2+/Li+ selectivity can be significantly improved by modulating the surface charge and pore size of nanofiltration membrane to improve the rejection of Mg2+ and permeation of Li+. In this paper, we used N-aminoethyl piperazine (AEP) as aqueous monomer and trimesoyl chloride (TMC) as organic phase monomer to prepare flat plate nanofiltration membranes with Mg2+/Li+ selectivity by regulating the concentration change of the aqueous phase monomer and controlling the denseness of the separation layer and the charge of the top and flip sides. It was found that the nanofiltration prepared with this monomer had a high MgCl2 rejection to 97.6 % and high LiCl/MgCl2 separation factor to 24.5 in single salt solution. In addition, the prepared nanofiltration membranes had good separation selectivity (SLi, Mg = 44.8) in the mixed salt system (Mg2+/Li+ mass ratio of 20

Funds：

国家重点研发计划（2021YFC330010003）；国家自然科学面上基金项目（51978466）

AuthorIntro：

苗闪闪（1997-），女，河南周口人，硕士研究生，研究方向为复合纳滤膜研制；电子邮件：1575061390@qq.com

Reference：

[1] Kavanagh L, Keohane J, Garcia Cabellos G, et al. Global Lithium Sources—Industrial Use and Future in the Electric Vehicle Industry: A Review [J]. Resources, 2018, 7(3):57-85.
[2] Swain B. Separation and purification of lithium by solvent extraction and supported liquid membrane, analysis of their mechanism: a review [J]. J Chem Technol Biot, 2016, 91(10): 2549-2562.
[3] Li X, Mo Y, Qing W, et al. Membrane-based technologies for lithium recovery from water lithium resources: A review [J]. J Membr Sci, 2019, 591:117317-117369.
[4] Shao L, Jin S. Resilience assessment of the lithium supply chain in China under impact of new energy vehicles and supply interruption [J]. J Clean Prod, 2020, 252:119624-119651.
[5] Xu S S, Song J F, Bi Q Y, et al. Extraction of lithium from Chinese salt-lake brines by membranes: Design and practice [J]. J Membr Sci, 2021, 635:119441-119462.
[6] An J W, Kang D J, Tran K T, et al. Recovery of lithium from Uyuni salar brine [J]. Hydrometallurgy, 2012, 117: 64-70.
[7] Liu X H, Chen X Y, He L H, et al. Study on extraction of lithium from salt lake brine by membrane electrolysis [J]. Desalination, 2015, 376: 35-40.
[8] Wang X L, Tsuru T, Nakao S I, et al. The electrostatic and steric-hindrance model for the transport of charged solutes through nanofiltration membranes [J]. J Membr Sci, 1997, 135: 19-32.
[9] Xu F, Dai L H, Wu Y L, et al. Li+/Mg2+separation by membrane separation: The role of the compensatory effect [J]. J Membr Sci, 2021, 636:119542-119550.
[10] Chen K, Zhao S, Lan H, et al. Dual-electric layer nanofiltration membranes based on polyphenol/PEI interlayer for highly efficient Mg2+/Li+ separation [J]. J Membr Sci, 2022, 660:120860-120869.
[11] Li Y, Wang S, Wu W, et al. Fabrication of positively charged nanofiltration membrane with uniform charge distribution by reversed interfacial polymerization for Mg2+/Li+ separation [J]. J Membr Sci, 2022, 659:120809-120821.
[12] Xu P, Wang W, Qian X, et al. Positive charged PEI-TMC composite nanofiltration membrane for separation of Li+ and Mg2+ from brine with high Mg2+/Li+ ratio [J]. Desalination, 2019, 449: 57-68.
[13] Liu S H, Wu C R, Hung W S, et al. One-step constructed ultrathin Janus polyamide nanofilms with opposite charges for highly efficient nanofiltration [J]. J Mater Chem A, 2017, 5(44): 22988-22996.
[14] Wang L, Lin Y K, Tang Y H, et al. Fabrication of oppositely charged thin-film composite polyamide membranes with tunable nanofiltration performance by using a piperazine derivative [J]. J Membr Sci, 2021, 634:119405-119415.
[15] Tang C Y Y, Kwon Y N, Leckie J O. Effect of membrane chemistry and coating layer on physiochemical properties of thin film composite polyamide RO and NF membranes I. FTIR and XPS characterization of polyamide and coating layer chemistry [J]. Desalination, 2009, 242(1-3): 149-167.
[16] Wang Z, Liang S, Kang Y, et al. Manipulating interfacial polymerization for polymeric nanofilms of composite separation membranes [J]. Prog Polym Sci, 2021, 122:101450-101480.
[17] Yang Z, Fang W, Wang Z, et al. Dual-skin layer nanofiltration membranes for highly selective Li+/Mg2+ separation [J]. J Membr Sci, 2021, 620:118862-118869
[18] Lu D, Ma T, Lin S S, et al. Constructing a selective blocked-nanolayer on nanofiltration membrane via surface-charge inversion for promoting Li+ permselectivity over Mg2+ [J]. J Membr Sci, 2021, 635:119504-119513.
[19] Li W, Shi C, Zhou A, et al. A positively charged composite nanofiltration membrane modified by EDTA for LiCl/MgCl2 separation [J]. Sep Purif Technol, 2017, 186: 233-242.
[20] Wu M B, Ye H, Zhu Z Y, et al. Positively-charged nanofiltration membranes constructed via gas/liquid interfacial polymerization for Mg2+/Li+ separation [J]. J Membr Sci, 2022, 644:119942-119949.
[21] Somrani A, Hamzaoui A H, Pontie M. Study on lithium separation from salt lake brines by nanofiltration (NF) and low pressure reverse osmosis (LPRO) [J]. Desalination, 2013, 317: 184-192.
[22] Guo C S, Li N, Qian X M, et al. Ultra-thin double Janus nanofiltration membrane for separation of Li+ and Mg2+: "Drag" effect from carboxyl-containing negative interlayer [J]. Sep Purif Technol, 2020, 230:15567-15617.
[23] Li X, Zhang C, Zhang S, et al. Preparation and characterization of positively charged polyamide composite nanofiltration hollow fiber membrane for lithium and magnesium separation [J]. Desalination, 2015, 369:26–36.
[24] Zhang H Z, Xu Z L, Ding H, et al. Positively charged capillary nanofiltration membrane with high rejection for Mg2+ and Ca2+ and good separation for Mg2+ and Li+ [J]. Desalination, 2017, 420: 158-166.

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com