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KMID : 1024520000090020165
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Journal of the Environmental Sciences
2000 Volume.9 No. 2 p.165 ~ p.171
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Basic Study for Development of Denitrogenation Process by Ion Exchange(III) - A kinetic study in the batch reactor -
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Chae Yong-Gon
Lee Dong-Hwan
Kim Sung-Il
Yoon Tae-Kyung
Hong Seong-Su
Lee Min-Gyu
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Abstract
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A kinetic study for anion exchange was performed for commercially available Cl- type anion exchange resin in use to remove nitrate in water. The obtained results from the batch reactor were applied to the Langmuir and Freundlich models. The constants for Lagmuir model were qmax =29.82 and b=0.202, and for Freundlich model were K=5.509 and n=1.772. Langmuir model showed betterfit than Frendlich model for the experimental results. Ion exchange reaction rate was also calculated and the the approximate first-order reaction, rate constant k1 was 0.16 L/mg.hr. Effective diffusion coefficient was obtained in the range from $9.6710^{-8} cm^2/sec$ for initial concentration change, and from $6.0910^{-7} to 3.9810^{-6} cm^2/sec$ for reaction temperature change. Activation energy during the diffusion was calculated as 26 kcal/mol.
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KEYWORD
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nitrate removal, anion exchange, Langmuir model, Feundlich model, effective diffusion coefficient
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