Extraction of metal ions (Fe3+, Co2+, Ni2+, Cu2+ and Zn2+) using immobilized-polysiloxane iminobis(n-2-aminophenylacetamide) ligand system |
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| Authors: | Nizam M. El-Ashgar Issa M. El-Nahhal Mohamed M. Chehimi Michel Delamar Florence Babonneau Jacques Livage |
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| Affiliation: | (1) Department of Chemistry, The Islamic University of Gaza, PO Box 108, Gaza, Palestine;(2) Department of Chemistry, Al-Azhar University, PO Box 1277, Gaza, Palestine;(3) ITODYS, Université Paris 7, Denis Diderot and CNRS (UMR 7086), 1 rue Guy de la Brosse, 75005 Paris, France;(4) Laboratoire de Chimie de la Matière Condensée, Université Paris VI and CNRS (UMR 7574), 4 place Jussieu, 75252 Paris Cedex 05, France;(5) Collège de France, 11 place Marcelin-Berthelot, 75005 Paris, France |
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| Abstract: | A new insoluble solid functionalized ligand system bearing chelating ligand group of the general formula P-(CH2)3-N[CH2CONH(C6H4)NH2]2, where P represents [Si–O] n polysiloxane network, was prepared by the reaction of the immobilized diethyliminodiacetate polysiloxane ligand system, P-(CH2)3N(CH2CO2Et)2 with 1,2-diaminobenzene in toluene. 13C CP-MAS NMR, XPS and FTIR results showed that most ethylacetate groups (–COOEt) were converted into the amide groups (–N–C=O). The new functionalized ligand system exhibits high capacity for extraction and removal of the metal ions (Fe3+, Co2+, Ni2+, Cu2+ and Zn2+) with efficiency of 95–97% after recovery from its primary metal complexes. This functionalized ligand system formed 1:1 metal to ligand complexes. |
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| Keywords: | Metal uptake Iminodiacetic acid Diethyliminodiacetate ligand 1,2-diaminobenzene Polysiloxanes Polysiloxane-immobilized ligand systems |
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