عنوان المقالة:Template Synthesis of Immobilized polysiloxane Diamine-Thiol tetraacetic acid Bi-Ligand system and its application for determination of metal ions
Issa M El-Nahhal, Nizam M El-Ashgar, Asmaa Abu-Shawish, Mona Abed El-Aziz Ahmed, Florence Babonneau
Abstract
A bi-functionalized porous solid diamine-thiol tetraacetic acid P‒(NN-SH)-TAA immobilized polysiloxane ligand system (where P represents [Si‒O]n polysiloxane network, (NN-SH) represents both diamine and thiol groups, and TAA represents tetracetic acid group) has been prepared by modification of a post-polysiloxane bi-functional diamine-thiol ligand system P-(NN-SH) with ethylchloroacetate. The immobilized bi-ligand system was characterized by 13C‒NMR and Fourier transform-Infrared spectra. The bi-ligand system was used
for the extraction of divalent metal ions from aqueous solutions, which include Ni2+, Cu2+, and Pb2+, by the batch method at different time intervals and different pH values (3.5–6). The maximum metal uptake capacity values toward Ni2+, Cu2+, and Pb2+ were found to be 18.2, 125.7, and 138.89 mg/g ligand respectively at pH 5.5. The use of cetyltrimethylammoniumbromide should modify material porosity and therefore increase the metal ion uptake capacity of immobilized ligand system. The presence of bi-functional ligand groups at the silica matrix is to increase the metal uptake capacity of M(II) ions.
Publication Date
10/3/2015
Publisher
Phosphorus, Sulfur, and Silicon and the Related Elements
أ.د نظام محمود الأشقر | Prof. Nizam M. El-Ashgar | 12317