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Selective removal of aluminum ions from rare earth solutions by using ion-imprinted polymers

Li, Wentao1,2; Guo, Jianwei1,2; Du, Haojie1,2; Wang, Dong1,3,4; Cao, Jianwei1; Wang, Zhi1,2,4
2022-04-01
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume286Pages:12
AbstractRemove of trace Al3+ from rare earth solutions is a challenging task. In the present study, an aluminum ion imprinted polymer (Al (III)-IIP) has been fabricated by surface-imprinting method. Al (III)-IIP was obtained by grafting silica gel with aminopropyl triethoxysilane and acrylic acid (AA). The structure and morphology of the polymer were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and thermogravimetric analysis (TG). The densification degree and the number of grafted functional groups were regulated by changing the synthesis conditions, and the optimal synthesis conditions are obtained as template ion: functional monomer: crosslinker = 1:8:8, and the optimal synthesis temperature is 333.15 K. The adsorption performance and selectivity properties of Al (III)-IIP were also investigated. The results show that at 298.15 K, the optimal pH for Al3+& nbsp;adsorption is 4. The maximum adsorption capacity is 106.0 mg.g(-1)& nbsp;& nbsp;at an Al3+& nbsp;ion concentration of 1000 mg.L-1, which is 50% higher than that of reported recently. In addition, the adsorption process reaches equilibrium within 180 min. Furthermore, among many adsorption models and isothermal models, pseudo-second-order (PSO) adsorption model and Langmuir isothermal model are more suitable for the adsorption process. The selectivity coefficient of the Al3+& nbsp;ion in binary mixtures of Nd3+, Ca2+ or Mg2+ are 17.76, 16.72 and 11.09, respectively. In addition, the adsorption mechanism of Al3+& nbsp;is most probably caused by the formation of ionic bond between the Al3+& nbsp;ions and the carboxyl functional groups on Al (III)-IIP and template effect. Results show that Al (III)-IIP has a great potential for a selective separation of aluminum ions from rare earth solutions.
KeywordIon imprinted polymers Selective adsorption Aluminum Acrylic acid Recognition mechanism
DOI10.1016/j.seppur.2022.120486
Language英语
WOS KeywordEFFECTIVE ADSORPTION ; SELECTIVE REMOVAL ; RECOVERY ; SEPARATION ; WATER ; AL(III) ; FE(III) ; CR(VI)
Funding ProjectNational Key R&D Program of China[2020YFC1909002] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-3] ; Ganjiang Innovation Academy, Chinese Academy of Science[E055A002] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM2020DB11]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key R&D Program of China ; Key Research Program of the Chinese Academy of Sciences ; Ganjiang Innovation Academy, Chinese Academy of Science ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences
WOS IDWOS:000781660400005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/52811
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Dong; Wang, Zhi
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Res, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Ganjiang Innovat Acad, Beijing, Peoples R China
4.1 BeiErJie,Zhong Guan Cun, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Li, Wentao,Guo, Jianwei,Du, Haojie,et al.

Selective removal of aluminum ions from rare earth solutions by using ion-imprinted polymers

[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,286:12.
APA Li, Wentao,Guo, Jianwei,Du, Haojie,Wang, Dong,Cao, Jianwei,&Wang, Zhi.(2022).

Selective removal of aluminum ions from rare earth solutions by using ion-imprinted polymers

.SEPARATION AND PURIFICATION TECHNOLOGY,286,12.
MLA Li, Wentao,et al."

Selective removal of aluminum ions from rare earth solutions by using ion-imprinted polymers

".SEPARATION AND PURIFICATION TECHNOLOGY 286(2022):12.
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