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Superior lithium adsorption and required magnetic separation behavior of iron-doped lithium ion-sieves
Wang, Shulei1,2; Zheng, Shili1; Wang, Zheming3; Cui, Wenwen1,2; Zhang, Hailin1,2; Yang, Liangrong1; Zhang, Yi1; Li, Ping1

The recent research on adsorption-based lithium recovery from lithium-containing solutions has been centred on adsorption capacity and separation of lithium ion-sieves powder from solutions. Herein, an effective iron-doped lithium titanium oxide (Fe-doped Li2TiO3) was synthesized by Fe-doping via solid state reactions followed by acid treatment to form iron-doped lithium ion-sieves (Fe/Ti-x(H)). The resulting solid powder displays both superior adsorption capacity of lithium and high separation efficiency of the adsorbent from the solutions. SEM imaging and BET surface area measurement results showed that at Fe doping levels x <= 0.15, Fe-doping led to grain shrinkage as compared to Li2TiO3 and at the same time the BET surface area increased. The Fe/Ti-0.15(H) exhibited saturated magnetization values of 13.76 emu g(-1), allowing effective separation of the material from solid suspensions through the use of a magnet. Consecutive magnetic separation results suggested that the Fe/Ti-0.15(H) powders could be applied at large-scale and continuously removed from LiOH solutions with separation efficiency of 96% or better. Lithium adsorption studies indicated that the equilibrium adsorption capacity of Fe/Ti-0.15(H) in LiOH solutions (1.8 g L-1 Li, pH 12) reached 53.3 mg g(-1) within 24 h, which was higher than that of pristine Li2TiO3 (50.5 mg g(-1)) without Fe doping. Competitive adsorption and regeneration results indicated that the Fe/Ti-0.15(H) possessed a high selectivity for Li with facile regeneration. Therefore, it could be expected that the iron-doped lithium ion-sieves have practical applicability potential for large scale lithium extraction and recovery from lithium-bearing solutions.

KeywordIron-doped Lithium Titanate Iron-doped Lithium Ion-sieves Magnetic Separation Lithium Adsorption Doping Technology Grain Shrinkage
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordSurface-properties ; Xps Spectra ; Tio2 ; Recovery ; Adsorbents ; Seawater ; Nanoparticles ; Performance ; Extraction ; Kinetics
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Nature Science Foundation of China(51574212 ; U1403195)
WOS IDWOS:000414913700019
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99354 USA
Recommended Citation
GB/T 7714
Wang, Shulei,Zheng, Shili,Wang, Zheming,et al. Superior lithium adsorption and required magnetic separation behavior of iron-doped lithium ion-sieves[J]. CHEMICAL ENGINEERING JOURNAL,2018,332:160-168.
APA Wang, Shulei.,Zheng, Shili.,Wang, Zheming.,Cui, Wenwen.,Zhang, Hailin.,...&Li, Ping.(2018).Superior lithium adsorption and required magnetic separation behavior of iron-doped lithium ion-sieves.CHEMICAL ENGINEERING JOURNAL,332,160-168.
MLA Wang, Shulei,et al."Superior lithium adsorption and required magnetic separation behavior of iron-doped lithium ion-sieves".CHEMICAL ENGINEERING JOURNAL 332(2018):160-168.
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