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The Scientific World Journal
Volume 2012 (2012), Article ID 351967, 10 pages
Research Article

Bach Adsorption Study for the Extraction of Silver Ions by Hydrazone Compounds from Aqueous Solution

1School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
2School of Dental Sciences, Universiti Sains Malaysia, Kelantan, 16150 Kubang Kerian, Malaysia

Received 20 October 2011; Accepted 25 December 2011

Academic Editors: T. Hatano and F. Wang

Copyright © 2012 Abdussalam Salhin Mohamad Ali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Sorbent materials based on a hydrazone Schiff base compound, C14H11BrN4O4, were prepared either by immobilizing the ligand into sol-gel (SG1) or bonding to silica (SG2). The sorbent materials were characterized by FT-IR, EDX, SEM, TEM, and TGA. The sorption characteristics of a matrix of eight transition metal ions (Ag+, Cu2+, Co2+, Ni2+, Fe3+, Pb2+, Zn2+, and Mn2+) using batch method were studied. Several key parameters that affected the extraction efficiency such as pH, contact time, metal ions concentration, and gel size (for SGl) were investigated and optimized. Under the optimized conditions, the physically immobilized hydrazone sorbent (SG1) exhibits highest selectivity towards Ag+ ions, while the chemically bonded hydrazone sorbent (SG2) exhibits high extraction for all metal ions tested. However, for practical applications such as the removal and preconcentration of Ag+, the physically immobilized sorbent (SG1) is preferred.