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Amine-modified tannin gel for efficient Pd(II) recovery from aqueous solution.
Author(s):
1. A. M. Nazmul-Alam: Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh
2. Shaheen M. Sarkarb: Department of Chemical Engineering, Inha University, Incheon 402-751, South Korea
Abstract:
Condensed-tannin gel has been investigated as a metal adsorbent for the recovery of precious metals from industrial wastes because of the presence of polyhydroxyphenyl groups in their structure. In order to enhance the adsorption properties of condensed-tannin gel, which shows very low adsorption rate and ability to adsorb only at low acidic condition, amine groups have been chemically introduced. Condensed-tannin gel was subjected to aqueous ammonia treatment for the introduction of new amine functional groups into the gel structure. The treatment conditions were optimized for maximum amine incorporation with the help of elemental analysis experiment. SEM photograph represented porous structure of the gel which assures effective mass-transfer performance. A comparison of adsorption kinetics of amine-modified tannin gel (ATG) with those of original tannin gel (TG) showed that ATG is more efficient for the uptake of Palladium(II) from acid solutions.
Page(s): 179-184
DOI: DOI not available
Published: Journal: Proceedings of Pakistan Academy of Sciences, Volume: 45, Issue: 4, Year: 2008
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