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Competitive Adsorption of Ions at the Oil-Water Interface: A Possible Mechanism Underlying the Separation Selectivity for Liquid-Liquid Solvent Extraction
Sun, Pan1,3; Huang, Kun1,2; Liu, Huizhou1
2018-11-06
Source PublicationLANGMUIR
ISSN0743-7463
Volume34Issue:44Pages:13155-13161
Abstract

Adsorption, especially competitive adsorption of ions at the interfaces, governs a wealth of physicochemical processes. Understanding the mechanism behind these interfacial behaviors is crucial for developing novel strategies to intensify reactions or transfer processes. Herein, as an example, we found that in the case of liquid-liquid transport of V(V) and Cr(VI) ions, the competitive adsorption of V(V) and Cr(VI) ions against coexisting SO42- ions at the oil-water interface exhibits a significant impact on the selective separation behaviors of V(V) and Cr(VI) ions. The transport of Cr(VI) ions would be hindered by adding Na2SO4 into the aqueous solutions because of the competitive adsorption of SO42- ions at the interface being stronger than that of Cr(VI) ions, whereas the transport of V(V) ions would not be affected because of the stronger affinity of V(V) ions to the interfaces compared to that of SO42- ions. The present work provides new inspirations for developing efficient strategies to improve the separation efficiency of target ions with similar physic-chemical properties by regulating their adsorption behaviors at the interface. It is beneficial to get a deeper understanding into the microscopic nature of competitive adsorption behaviors of ions at interfaces from the interface-molecular level.

DOI10.1021/acs.langmuir.8b02691
Language英语
WOS KeywordSitu Atr-ftir ; Surface-tension ; Molecular-dynamics ; Aqueous-solutions ; Electrolyte-solutions ; Air/water Interface ; Calcium-ions ; Force-fields ; X-ray ; Simulations
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] ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)[2012CBA01203]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Program)
WOS IDWOS:000449722400008
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26670
Collection中国科学院过程工程研究所
Corresponding AuthorHuang, Kun
Affiliation1.Chinese Acad Sci, CAS Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Sci & Technol Beijing, School Met & Ecol Engn, Beijing 100083, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun, Pan,Huang, Kun,Liu, Huizhou. Competitive Adsorption of Ions at the Oil-Water Interface: A Possible Mechanism Underlying the Separation Selectivity for Liquid-Liquid Solvent Extraction[J]. LANGMUIR,2018,34(44):13155-13161.
APA Sun, Pan,Huang, Kun,&Liu, Huizhou.(2018).Competitive Adsorption of Ions at the Oil-Water Interface: A Possible Mechanism Underlying the Separation Selectivity for Liquid-Liquid Solvent Extraction.LANGMUIR,34(44),13155-13161.
MLA Sun, Pan,et al."Competitive Adsorption of Ions at the Oil-Water Interface: A Possible Mechanism Underlying the Separation Selectivity for Liquid-Liquid Solvent Extraction".LANGMUIR 34.44(2018):13155-13161.
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