Characterization and adsorption properties of the chelating hydrogels derived from natural materials for possible use in the improvement of groundwater quality

Autor: A. El-Hag Ali, Hosam A. Shawky, R. A. El Sheikh
Rok vydání: 2006
Předmět:
Zdroj: Journal of Applied Polymer Science. 99:2904-2912
ISSN: 1097-4628
0021-8995
Popis: A new carrageenan based chelating copolymer sorbent was prepared by gamma radiation induced copolymerization and crosslinking of kappa-carrageenan (k-Car) and acrylic acid (AAc). The swelling characteristics of the prepared copolymer were investigated by studying the effect of time, pH, and ionic strength of the swelling medium. The sorption capacities of the chelating copolymer for Fe, Pb, Mn, Zn, Cu, Sr, Cd, and Al were 172, 202, 202, 216, 221, 230, 239, and 244 mg/g respectively. The Freundlich and Langmuir adsorption isotherms were used to validate the metal uptake data and heats of adsorption for the investigated metal ions were calculated. The re-use experiment showed that the prepared hydrogel could be regenerated upto at least 10 times. Because of the promising data collected from bench scale experiments, the prepared copolymer was examined as chelating sorbent to improve the quality of some groundwater resources. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci, 2006
Databáze: OpenAIRE
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