Quaternized Poly(4-Vinylpyridine) Coated Activated Carbon: Diffusion Controlled Sorption of Chromium(VI)
Publication: Journal of Environmental Engineering
Volume 133, Issue 8
Abstract
Quaternized poly(4-vinylpyridine) coated activated carbon has been proven to be successful in removal and recovery of from aqueous solution. However, the key component of the mass transfer operations and the diffusion coefficient has not been determined. In this study, adsorption of was investigated at different initial concentrations. A finite bath diffusion control model with changing bulk concentrations was derived analytically, and a constant related to radius of the absorbent particle and the fractional attainment of adsorption was first introduced into this model. Results indicated that the adsorbent provided fast adsorption kinetics and the modified diffusion-control model fitted the experimental data well. The observed sorption kinetics was consistent with the finite bath diffusion, with an average value of for the product of the distribution coefficient and the effective diffusivity in the adsorption of on the quaternized poly(4-vinylpyridine) coated activated carbon.
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Acknowledgments
The writers are grateful to the Department of Energy (DOE), USA, under Grant No. DE-FC26-02NT41607 for the financial support.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 133 • Issue 8 • August 2007
Pages: 834 - 838
Copyright
© 2007 ASCE.
History
Received: Jun 5, 2006
Accepted: Mar 14, 2007
Published online: Aug 1, 2007
Published in print: Aug 2007
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