Show simple item record

dc.contributor.authorBıçak, Niyazi
dc.contributor.authorŞungur, Şana Kutun
dc.contributor.authorTan, Nükhet
dc.contributor.authorGazi, Mustafa
dc.date.accessioned2019-06-27T08:01:03Z
dc.date.available2019-06-27T08:01:03Z
dc.date.issued2002
dc.identifier.issn0149-6395
dc.identifier.issn1520-5754
dc.identifier.urihttps://hdl.handle.net/20.500.12469/229
dc.identifier.urihttps://doi.org/10.1081/SS-120003517
dc.description.abstractAn organic-soluble chelating agent NN'-di-n-octadecyl ethylenediamine-NN'-diacetic acid (DOED) has been synthesized in two steps by (i) condensation of dibromoethane with 1-amino octadecane (octadecylamine) and (ii) subsequent reaction with sodium chloro acetate in alcohol-water mixture. The chelating agent in 2-ethylhexanol-cyclohexanol (1:1) solutions shows extremely high chelating ability for Ni(II) Co(II) Cu(II) Fe(111) Cr(III) and Cd(II) ions in neutral aqueous solutions. Extractions take place by the formation of (1:1) ligand-to-metal complexes and extraction coefficients are in the range 0.74-0.99. The ligand can be regenerated almost quantitatively by washing its complexes with 1M HCl and 0.2 M NaOH solutions successively. In each extraction step the organic solution exhibits a clear-cut phase separation and does not need salting out. The chelating agent can be regenerated and recycled more than 24 times without losing its extracting ability due to nonhydrolyzability of linkages in its structure. Experiments indicate that in high metal concentrations (more than 1 M) the solvent mixture itself is able to extract appreciable amounts of metal ions (33-53%). The solubility in organic solvents induced by long aliphatic chains seems to be general and the method presented offers possibility of large scale chelate extraction of metal ions of relatively low concentrations.
dc.language.isoEnglish
dc.publisherTaylor & Francis Inc
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectChelate extraction of metal ions
dc.subjectEthylenediamine diacetic acids
dc.subjectMetal extraction
dc.titleChelate extraction of transition metal ions by ethylene diamine diacetic acid with n-substituted octadecyl groups
dc.typeArticle
dc.identifier.startpage2353
dc.identifier.endpage2368
dc.relation.journalSeparation Science and Technology
dc.identifier.issue10
dc.identifier.volume37
dc.identifier.wosWOS:000176755500007
dc.identifier.doi10.1081/SS-120003517
dc.contributor.khasauthorŞungur, Şana Kutun


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record