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The nature of salt effect in enhancing the extraction of rare earths by non-functional ionic liquids: Synergism of salt anion complexation and Hofmeister bias
Sun, Pan2,3; Huang, Kun1,2; Liu, Huizhou2
2019-03-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume539Pages:214-222
AbstractSeparation and recycling of rare-earths using ionic liquids as extractant are becoming a promising approach to replace traditional volatile organic solvents in recent years. Generally, the addition of some special salts could improve the extraction efficiency of rare-earths by numerous non-functional ionic liquids. However, knowledge behind the nature of the salt effect is limited. Here, we found that the enhancement in the extraction of rare-earth ions, Pr3+ ions, using non-functional ionic liquid, [A336] [NO3] (Tricaprylmethylammonium nitrate) was driven by the synergism of Hofmeister bias and complexation behaviors of salt anions with Pr3+ ions. Molecular dynamic simulations offered a new insight into the interaction mechanism of the ionic liquid with Pr3+ ions at liquid/liquid interface. It was revealed that salt anions could perform as a bridge to connect Pr3+ ions and the ionic liquid, so that promoted the extraction of Pr3+ ions. Therefore, the strong complexation ability of salt anions with Pr3+ ions and poor hydration of salt anions faciliated the transport of Pr3+ ions across liquid/liquid interface. (C) 2018 Elsevier Inc. All rights reserved.
KeywordIonic liquids Salt effect Salt anion complexation Solvent extraction Rare earths
DOI10.1016/j.jcis.2018.12.058
Language英语
WOS KeywordMOLECULAR-DYNAMICS SIMULATION ; SOLVENT-EXTRACTION ; TRIVALENT LANTHANIDE ; AQUEOUS NITRATE ; ACTINIDE IONS ; FORCE-FIELD ; CHLORIDE ; COORDINATION ; SEPARATION ; METAL
Funding ProjectNational Natural Science Foundation of China[51574213] ; National Natural Science Foundation of China[51074150] ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)[2013CB632602]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Natural Science Foundation of China ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)
WOS IDWOS:000458343500024
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/27886
Collection中国科学院过程工程研究所
Corresponding AuthorHuang, Kun
Affiliation1.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun, Pan,Huang, Kun,Liu, Huizhou. The nature of salt effect in enhancing the extraction of rare earths by non-functional ionic liquids: Synergism of salt anion complexation and Hofmeister bias[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2019,539:214-222.
APA Sun, Pan,Huang, Kun,&Liu, Huizhou.(2019).The nature of salt effect in enhancing the extraction of rare earths by non-functional ionic liquids: Synergism of salt anion complexation and Hofmeister bias.JOURNAL OF COLLOID AND INTERFACE SCIENCE,539,214-222.
MLA Sun, Pan,et al."The nature of salt effect in enhancing the extraction of rare earths by non-functional ionic liquids: Synergism of salt anion complexation and Hofmeister bias".JOURNAL OF COLLOID AND INTERFACE SCIENCE 539(2019):214-222.
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