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    Öğe
    Selective Extraction of Copper(II) from Aqueous Solution by Using Schiff Bases
    (Polish Chemical Soc, 2009) Aydin, I.; Sozcan, S.; Ziyadanogullari, B.; Temel, H.
    New [N,N'-bis-(salicylaldehydene)-1,2-bis-(m-aminophenoxy)ethane] (MAS) and a common tetra dentate ligand N,N'-ethylenebis(salicylideneimine) (AS) for this study have been prepared, and the new ligand was characterized on the basis of microanalytical data, elemental analysis, UV-visible, IR, H-1 NMR and C-13 NMR spectra. Selective extraction of Cu(II) from aqueous solution by using N,N'-bis-(salicylaldehydene)-1,2-bis-(m-aminophenoxy)ethane and N,N'-ethylenebis(salicylideneimine) was studied. Separation of Cu(II) from other metal ions such as Cd(II), Pb(II), Ni(II), Co(II) in aqueous solutions of various pH values and complexing reagents (MAS, AS) was described. The separation factors for these metals using these reagents were reported and efficient methods for the separation of Cu(II) from other metal ions were proposed. From the loaded organic phase, Cu(II) stripping was carried out in one stage with different mineral acid solutions. The stripping efficiency was found to be quantitative in case of H2SO4 for MAS and HNO3, H2SO4, HCl for AS.10
  • [ X ]
    Öğe
    Solvent Extraction, Preconcentration and Determination of Thorium with Monoaza 18-Crown-6 Derivative
    (Korean Chemical Soc, 2011) Dolak, I.; Karakaplan, M.; Ziyadanogullari, B.; Ziyadanogullari, R.
    A solvent extraction separation, preconcentration and determination of thorium with a new crown, 2-ethyl-N-benzyl-4,7,10,13,16-pentaoxa-1-azacyclooctadecane (MACE), is described in the study. The amount of thorium in the aqueous phase and organic phase was determined by Inductively Coupled Plasma-Optical Emission Spectroscopy and Ultraviolet-Visible, respectively. Thorium loaded organic phase was quantitatively stripped in a stage by using 1.0 M HNO(3). Thorium was effectively extracted with MACE in the pH range of 67 to produce a 3:2 complex ratio in the chloroform. A highly sensitive and rapid spectrophotometric method was described for determination of trace amounts of thorium with MACE. The effective molar absorption coefficient at 281 nm is 1.98 x 10(3) mol(-1) cm(-1), and the system complies with Beer's law in the range from 0.464 to 2.32 mu g mL(-1) of thorium. Thorium was also determined in standard and environmental samples.