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Two and three-phase separation of phenol and o-nitrophenol: Correlation between phase behavior and partitioning behavior
Alternative TitleColloid Surf. A-Physicochem. Eng. Asp.
Yu, Pinhua1,2,3; Huang, Kun1; Liu, Huizhou1
2012-06-05
Source PublicationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN0927-7757
Volume403Issue:403Pages:15-24
AbstractPartitioning of two model organic compounds, phenol and o-nitrophenol (o-NP), in aqueous two-phase system (ATPS) of PEG2000-(NH4)(2)SO4 and three-liquid-phase system (TLPS) of butyl acetate (BA)-PEG2000-(NH4)(2)SO4 were systematically investigated. Experimental results indicated that the enrichment of phenol and o-NP in the salting-out PEG2000 top phase of ATPS as well as the selectively transfer of the two compounds respectively into BA top phase and PEG2000 middle phase of TLPS were closely related to the phase-forming behavior of ATPS and TLPS. The aggregation behavior of PEG macromolecules is crucial for the phase evolution and distribution of phenol and o-NP. Variation in distribution ratios resulted from the change in microenvironment of salting-out PEG2000 phase induced by increasing concentrations of PEG, (NH4)(2)SO4 and pH. Addition of BA promoted the unevenly mass transfer of phenol from PEG2000 aqueous phase to organic BA phase, leading to the separation between phenol and o-NP. A suggested mass transfer model describes the entrapment of phenolic compounds from salt aqueous phase to PEG2000 phase under the modulation of salt concentrations and system pH. A possible microscopic mechanism was proposed to describe the selective mass transfer of phenol from PEG2000 phase to BA organic top phase in the resultant TLPS of BA-PEG2000-(NH4)(2)SO4. (C) 2012 Elsevier B.V. All rights reserved.; Partitioning of two model organic compounds, phenol and o-nitrophenol (o-NP), in aqueous two-phase system (ATPS) of PEG2000-(NH4)(2)SO4 and three-liquid-phase system (TLPS) of butyl acetate (BA)-PEG2000-(NH4)(2)SO4 were systematically investigated. Experimental results indicated that the enrichment of phenol and o-NP in the salting-out PEG2000 top phase of ATPS as well as the selectively transfer of the two compounds respectively into BA top phase and PEG2000 middle phase of TLPS were closely related to the phase-forming behavior of ATPS and TLPS. The aggregation behavior of PEG macromolecules is crucial for the phase evolution and distribution of phenol and o-NP. Variation in distribution ratios resulted from the change in microenvironment of salting-out PEG2000 phase induced by increasing concentrations of PEG, (NH4)(2)SO4 and pH. Addition of BA promoted the unevenly mass transfer of phenol from PEG2000 aqueous phase to organic BA phase, leading to the separation between phenol and o-NP. A suggested mass transfer model describes the entrapment of phenolic compounds from salt aqueous phase to PEG2000 phase under the modulation of salt concentrations and system pH. A possible microscopic mechanism was proposed to describe the selective mass transfer of phenol from PEG2000 phase to BA organic top phase in the resultant TLPS of BA-PEG2000-(NH4)(2)SO4. (C) 2012 Elsevier B.V. All rights reserved.
KeywordThree-liquid-phase Extraction Phase Behaviors Mass Transfer Aggregation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.colsurfa.2012.03.033
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPOLY(ETHYLENE OXIDE) SOLUTIONS ; AQUEOUS 2-PHASE SYSTEMS ; CLOUD-POINT EXTRACTION ; WATER-SOLUBLE POLYMER ; 3-LIQUID-PHASE EXTRACTION ; POLYETHYLENE-GLYCOL ; BIPHASIC SYSTEMS ; PEO SOLUTIONS ; AGGREGATION ; SALT
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000304840700003
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6514
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yu, Pinhua,Huang, Kun,Liu, Huizhou. Two and three-phase separation of phenol and o-nitrophenol: Correlation between phase behavior and partitioning behavior[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2012,403(403):15-24.
APA Yu, Pinhua,Huang, Kun,&Liu, Huizhou.(2012).Two and three-phase separation of phenol and o-nitrophenol: Correlation between phase behavior and partitioning behavior.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,403(403),15-24.
MLA Yu, Pinhua,et al."Two and three-phase separation of phenol and o-nitrophenol: Correlation between phase behavior and partitioning behavior".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 403.403(2012):15-24.
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