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
发表期刊COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
卷号490期号:FEB页码:155-162
摘要The 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
关键词Three-liquid-phase System Rare Earths Partition Coefficients Phase Volume Ratios Hydration
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2015.11.054
收录类别SCI
语种英语
关键词[WOS]AQUEOUS 2-PHASE SYSTEMS ; LIQUID-LIQUID EQUILIBRIUM ; SEPARATION ; EXTRACTION ; CHROMATOGRAPHY
WOS研究方向Chemistry
WOS类目Chemistry, Physical
项目资助者Key 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记录号WOS:000367233200018
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/20245
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.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
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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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