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Development of Bentonite-Alginate Films for Enhancement in Cd(II) Removal

Published online by Cambridge University Press:  31 January 2011

Wah Tzu Teoh ,
Takuma Tsuritani  and
Kazunori Sato
Wah Tzu Teoh
Affiliation:
teoh@vos.nagaokaut.ac.jpteohwz@pc.jaring.my
Takuma Tsuritani
Affiliation:
ttakuma@stn.nagaokaut.ac.jp, Nagaoka University of Technology, Environmental Engineering, Nagaoka, Japan
Kazunori Sato
Affiliation:
sato@analysis.nagaokaut.ac.jp, Nagaoka University of Technology, Environmental Engineering, Nagaoka, Japan
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Abstract

The comparison between bentonite-alginate beads and bentonite-alginate films in Cd(II) removal from aqueous solution was investigated. The experimental Cd(II) adsorption data were fitted to adsorption isotherm and kinetic models. Results showed that both bentonite-alginate film and beads were fitted better to the Langmuir isotherm model, the calculated saturation adsorption capacity for bentonite-alginate film was 59.9 mg/g as compared to 17.9 mg/g for the beads. The kinetic studies indicated that both samples followed the pseudo-second-order kinetic. The bentonite- alginate film showed higher adsorption capacity, rate constant as well as initial adsorption rate. This investigation showed that the adsorption behavior of both samples, in terms of adsorption isotherm and kinetic models, did not deviate significantly. The bentonite-alginate film has better performance in Cd(II) removal, attributed to the larger surface area which is exposed to the Cd(II) solution.

Keywords

absorptionbiomaterialCd
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1219: Symposium AA – Renewable Biomaterials and Bioenergy – Current Developments and Challenges , 2009 , 1219-AA06-07
Copyright
Copyright © Materials Research Society 2010

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