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DiaNanofiltration-based process for effective separation of Li+ from the high Mg2+/Li+ ratio aqueous solution
Ashraf, Muhammad Awais1,3; Li, Xingchun2; Wang, Junfeng1; Guo, Shiwei1,3; Xu, Bao-Hua1
2020-09-15
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume247Pages:9
AbstractLithium separation from salt lake brines with a high concentration of magnesium is challenging. In this work, separation efficiencies for Li+ and Mg2+ with three commercial NF membranes (NF-270, Desal-5DL, and Desal-5DK) were systematically investigated by DiaNanofiltration method. Experimental results showed that DiaNanofiltration was an effective technique to separate Li+ and reduce the high Mg2+/Li+ ratio from ternary salt solutions of LiCl and MgCl2. The solution-diffusion transport model was also used to calculate the real retention of Li+ and Mg2+, which predicted good agreement with the experimental results of the diafiltration process based on steric hindrance and the Donnan exclusion mechanism. NF270 membrane exhibited high permeation to Li+, about 90% for the ternary solution of LiCl + MgCl2 + H2O at a flux of 21.33 L.m(-2).h(-1). The real Mg2+ retention was attained around 96% with DK membrane, which was higher as compared to NF270 due to the steric hindrance effect. Moreover, the Mg2+/Li+ ratio was also reduced from 30 to 1.7 in the single-stage DiaNanofiltration process.
KeywordDiaNanofiltration Lithium separation Salt-lake brine high Mg-2(+)/L+ ratio
DOI10.1016/j.seppur.2020.116965
Language英语
WOS KeywordSALT LAKE BRINE ; NANOFILTRATION MEMBRANE ; LITHIUM AVAILABILITY ; REVERSE-OSMOSIS ; RECOVERY ; REMOVAL ; TEMPERATURE ; PERFORMANCE ; RESOURCES ; MAGNESIUM
Funding ProjectNational Natural Science Foundation of China[21978302] ; Fujian Innovation Academy, Chinese Academy of Sciences[FJCXY18040101] ; CAS-TWAS President's Fellowship Program
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Fujian Innovation Academy, Chinese Academy of Sciences ; CAS-TWAS President's Fellowship Program
WOS IDWOS:000536142200017
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40869
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Junfeng; Xu, Bao-Hua
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.CNPC Res Inst Safety & Environm Technol, State Key Lab Petr Pollut Control, Beijing 102206, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Ashraf, Muhammad Awais,Li, Xingchun,Wang, Junfeng,et al. DiaNanofiltration-based process for effective separation of Li+ from the high Mg2+/Li+ ratio aqueous solution[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,247:9.
APA Ashraf, Muhammad Awais,Li, Xingchun,Wang, Junfeng,Guo, Shiwei,&Xu, Bao-Hua.(2020).DiaNanofiltration-based process for effective separation of Li+ from the high Mg2+/Li+ ratio aqueous solution.SEPARATION AND PURIFICATION TECHNOLOGY,247,9.
MLA Ashraf, Muhammad Awais,et al."DiaNanofiltration-based process for effective separation of Li+ from the high Mg2+/Li+ ratio aqueous solution".SEPARATION AND PURIFICATION TECHNOLOGY 247(2020):9.
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