Synthesis, characterization and structure effects on preconcentration and extraction of N,N?-bis-(salicylaldehydene)-1,4-bis-(p-aminophenoxy) butane towards some divalent cations
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Tarih
2008
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Separation with solvent extraction of Cu(II), Co(II) and Ni(II) from aqueous solution using N,N'-bis-(salicylaldehydene)-1,4-bis-(p-aminophenoxy)butane (H2L) as the new extractant has been studied. The new Schiff base, was synthesized by reaction of 1,4-bis-(p-aminophenoxy)butane and salicylaldehyde. Microanalytical data, elemental analysis, UV-vis H-1 NMR and C-13 NMR spectra and IR-spectra were used to confirm the structures. The extractability and selectivity of divalent cations was evaluated as a function of relationship between distribution ratios of the metal and pH or ligand concentration. Cu+2 showed the highest extractability and selectivity at pH 7.8, whereas Ni+2 and Co+2 showed at pH 9.2. From the loaded organic phase, Cu(II), Co(II), Ni(II) stripping were carried out in one stage with aqueous acid solution including various concentrations of HCl The stripping efficiency was found to be quantitative in case of 1.5 M HCl From quantitative evaluation of the extraction equilibrium data, it has been deduced that the complexes extracted are the simple 1:1 chelates, CuL, CoL, NiL. (c) 2007 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Schiff Bases, Synthesis, Extraction, Preconcentration
Kaynak
Journal of Hazardous Materials
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
150
Sayı
2
