ICCAS OpenIR
Extraction of metal ions with non-fluorous bipyridine derivatives as chelating ligands in supercritical carbon dioxide
Wang, Wei1,2; Yang, Hai-Jian1,2; Hua, Juncheng1,2; Guo, Cun-Yue3
2009-12-01
Source PublicationJOURNAL OF SUPERCRITICAL FLUIDS
ISSN0896-8446
Volume51Issue:2Pages:181-187
AbstractThree new non-fluorous bipyridine derivatives, bis(2-(2-butoxyethoxy)ethyl)-2,2'-bipyridine-4,4'-dicarboxylate (ligand 1), bis(2-(2-ethoxyethoxy)ethyl)-2,2'-bipyridine-4,4'-dicarboxylate (ligand 2), and bis(2-butoxyethyl)-2,2'-bipyridine-4,4'-dicarboxylate (ligand 3), were synthesized as chelating ligands to remove metal ions from solid matrix into supercritical CO(2) (scCO(2)). These produced compounds 1-3 showed considerable solubilities in scCO(2) (8.0 g/l, 4.8 g/l, 7.8 g/l for ligands 1-3 at 313 K, respectively) and the tested solubility data were then calculated and correlated with semiempirical model at different pressures and temperatures, which showed satisfactory agreement with each other and the average absolute relative deviation were in the range of 0.1-28.3%. The effects of pressure, temperature, time, and ligand to metal ratio (5:1 to 75:1) on the extraction efficiency of metal ions were also systematically investigated. The extraction efficiency was 100% for Ni(2+) and 95.9% for Cu(2+) in scCO(2) with the system of ligand 1, ultrapure water, and perfluoro-1-octanesulfonic acid tetraethylammonium salt (PFOAT) under the optimized conditions (25 MPa, 313 K, 90 min, and ligand to metal ratio of 10). Although all ligands exhibited good efficiency for Ni(2+) (>85%) and Cu(2+) (>70%) extraction, the extraction of mixed metal ions indicated that the bipyridine derivatives had low selectivity. Finally, the detailed calculation results exhibited that the extraction constants (K(ex)) of the metal ions increased with the increase of the extraction efficiency in the same extraction system for each same metal ion. (C) 2009 Elsevier B.V. All rights reserved.
KeywordSupercritical Co(2) Non-fluorous Bipyridine Derivatives Solubility Semiempirical Model Metal Ions Extraction Extraction Constant
DOI10.1016/j.supflu.2009.07.010
Indexed BySCI
Language英语
WOS IDWOS:000274350800013
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67604
Collection中国科学院化学研究所
Corresponding AuthorYang, Hai-Jian
Affiliation1.S Cent Univ Nationalities, Key Lab Analyt Chem State Ethn Affairs Comm, Key Lab Catalysis & Mat Sci State Ethn Affairs Co, Wuhan 430074, Peoples R China
2.S Cent Univ Nationalities, Minist Educ, Wuhan 430074, Peoples R China
3.Chinese Acad Sci, Inst Chem, New Mat Lab, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang, Wei,Yang, Hai-Jian,Hua, Juncheng,et al. Extraction of metal ions with non-fluorous bipyridine derivatives as chelating ligands in supercritical carbon dioxide[J]. JOURNAL OF SUPERCRITICAL FLUIDS,2009,51(2):181-187.
APA Wang, Wei,Yang, Hai-Jian,Hua, Juncheng,&Guo, Cun-Yue.(2009).Extraction of metal ions with non-fluorous bipyridine derivatives as chelating ligands in supercritical carbon dioxide.JOURNAL OF SUPERCRITICAL FLUIDS,51(2),181-187.
MLA Wang, Wei,et al."Extraction of metal ions with non-fluorous bipyridine derivatives as chelating ligands in supercritical carbon dioxide".JOURNAL OF SUPERCRITICAL FLUIDS 51.2(2009):181-187.
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