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Partitioning of rare earths in polymer-based three-liquid-phase system driven by transfer of hydrated PEGs: Understanding change of phase volume ratios
Sui, Na1,2; Huang, Kun1; Liu, Huizhou1
2016-02-05
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume490Issue:FEBPages:155-162
AbstractThe relationship between the partitioning of rare-earth ions in polymer-based three-liquid-phase system (TLPS) of Cyanex 272/PEG 6001(NH4)(2)SO4-H2O and the change in volume ratios of PEG-rich middle phase to salt-rich bottom phase was investigated. It was found that the change in phase volume ratios might be attributed to the transfer of hydrated PEG molecules. Therefore, the partitioning of hydrated PEG is a main driving force for the partitioning of rare earths. The change in water content in PEG-rich phase should be taken into account for calculating partition coefficients of rare-earth ions. The traditional Diamond-Hsu model derived from Flory-Huggins theory considered only the partitioning of simple PEG molecules to calculate the partition coefficients of targets in polymer-based aqueous biphasic system, so that it could not reflect such influences from the change in phase volume ratios. The present work discusses the influences from the change of the concentrations of PEG and inorganic salt, Cyanex 272 concentration in top organic phase of TLPS, aqueous pH value and initial concentration of rare-earth ions, on the partitioning of rare-earth ions into PEG-rich middle phase of TLPS. Experimental results indicate
KeywordThree-liquid-phase System Rare Earths Partition Coefficients Phase Volume Ratios Hydration
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2015.11.054
Indexed BySCI
Language英语
WOS KeywordAQUEOUS 2-PHASE SYSTEMS ; LIQUID-LIQUID EQUILIBRIUM ; SEPARATION ; EXTRACTION ; CHROMATOGRAPHY
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationKey Project of Chinese National Programs for Fundamental Research and Development (973 Program)(2012CBA01203 ; National Natural Science Foundation of China(51574213 ; Innovative Research Group Science Fund(20221603) ; 2013CB632602) ; 51074150)
WOS IDWOS:000367233200018
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20245
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sui, Na,Huang, Kun,Liu, Huizhou. Partitioning of rare earths in polymer-based three-liquid-phase system driven by transfer of hydrated PEGs: Understanding change of phase volume ratios[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2016,490(FEB):155-162.
APA Sui, Na,Huang, Kun,&Liu, Huizhou.(2016).Partitioning of rare earths in polymer-based three-liquid-phase system driven by transfer of hydrated PEGs: Understanding change of phase volume ratios.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,490(FEB),155-162.
MLA Sui, Na,et al."Partitioning of rare earths in polymer-based three-liquid-phase system driven by transfer of hydrated PEGs: Understanding change of phase volume ratios".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 490.FEB(2016):155-162.
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