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Three-Liquid-Phase Extraction: A New Approach for Simultaneous Enrichment and Separation of Cr(III) and Cr(VI)
Alternative TitleInd. Eng. Chem. Res.
Xie, Keng1,2,3; Huang, Kun1; Yang, Liangrong1; Yu, Pinhua1,2,3; Liu, Huizhou1
2011-11-16
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
ISSN0888-5885
Volume50Issue:22Pages:12767-12773
AbstractA novel and simple three-liquid-phase extraction (TLPE) approach was developed for the simultaneous removal and separation of Cr(III)) and Cr(VI)) from aqueous, solutions. The, proposed three-liquid-phase system (TLPS) consists of di(2-ethylhexyl)phosphoric acid, (D2EHPA), poly(ethylene glycol) (PEG) with a molecular Weight of 2000, and (NH(4))(2)SO(4). The effects of various factors including the aqueous solution pH, amounts Of (NH(4))(2)SO(4) and PEG, initial chromium amount, D2EHPA, concentration, phase mixing time; and diluent on the three-phase partitioning behavior of Cr(11) and Cr(VI) were evaluated, The distribution behavior of the two oxidation states of chromium was found to be highly pH-dependent. Cr(III) preferred the D2EHPA-rich top, phase through a cation exchange reaction, whereas. Cr(VI) was enriched in the PEG-rich Middle phase through : ion pair formation By appropriate selection of the extraction conditions, nearly all of the Cr(III),Was extracted into the D2EHPA top phase; and More than 90% of the Cr(VI) was transferred into the PEG rich Middle phase within 5 min. The present work highlights the possibility of Using the TLPE approach for the extraction and Separation of two different oxidation states of metal ions, such as Cr(III) and Cr(VI), in a single extraction step.; A novel and simple three-liquid-phase extraction (TLPE) approach was developed for the simultaneous removal and separation of Cr(III)) and Cr(VI)) from aqueous, solutions. The, proposed three-liquid-phase system (TLPS) consists of di(2-ethylhexyl)phosphoric acid, (D2EHPA), poly(ethylene glycol) (PEG) with a molecular Weight of 2000, and (NH(4))(2)SO(4). The effects of various factors including the aqueous solution pH, amounts Of (NH(4))(2)SO(4) and PEG, initial chromium amount, D2EHPA, concentration, phase mixing time; and diluent on the three-phase partitioning behavior of Cr(11) and Cr(VI) were evaluated, The distribution behavior of the two oxidation states of chromium was found to be highly pH-dependent. Cr(III) preferred the D2EHPA-rich top, phase through a cation exchange reaction, whereas. Cr(VI) was enriched in the PEG-rich Middle phase through : ion pair formation By appropriate selection of the extraction conditions, nearly all of the Cr(III),Was extracted into the D2EHPA top phase; and More than 90% of the Cr(VI) was transferred into the PEG rich Middle phase within 5 min. The present work highlights the possibility of Using the TLPE approach for the extraction and Separation of two different oxidation states of metal ions, such as Cr(III) and Cr(VI), in a single extraction step.
KeywordAtomic-absorption-spectrometry Electroplating Waste-water Liquid-liquid-extraction Cloud Point Extraction N-butyl-phosphate Solvent-extraction Phosphoric-acid Facilitated Transport Hexavalent Chromium Industrial-waste
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ie201816j
URL查看原文
Indexed BySCI
Language英语
WOS KeywordATOMIC-ABSORPTION-SPECTROMETRY ; ELECTROPLATING WASTE-WATER ; LIQUID-LIQUID-EXTRACTION ; CLOUD POINT EXTRACTION ; N-BUTYL-PHOSPHATE ; SOLVENT-EXTRACTION ; PHOSPHORIC-ACID ; FACILITATED TRANSPORT ; HEXAVALENT CHROMIUM ; INDUSTRIAL-WASTE
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000296674500051
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6512
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, State Key Lab Biochem Engn, Inst Proc 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
Xie, Keng,Huang, Kun,Yang, Liangrong,et al. Three-Liquid-Phase Extraction: A New Approach for Simultaneous Enrichment and Separation of Cr(III) and Cr(VI)[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2011,50(22):12767-12773.
APA Xie, Keng,Huang, Kun,Yang, Liangrong,Yu, Pinhua,&Liu, Huizhou.(2011).Three-Liquid-Phase Extraction: A New Approach for Simultaneous Enrichment and Separation of Cr(III) and Cr(VI).INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,50(22),12767-12773.
MLA Xie, Keng,et al."Three-Liquid-Phase Extraction: A New Approach for Simultaneous Enrichment and Separation of Cr(III) and Cr(VI)".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 50.22(2011):12767-12773.
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