The objective of this study is to evaluate the applicability of adsorption models for predicting the properties of adsorbents. The kinetics of the adsorption of NO3− ions on a PP-g-AA-Am non-woven fabric have been investigated under equilibrium conditions in both batch and fixed bed column processes. The adsorption equilibrium experiments in the batch process were carried out under different adsorbate concentration and adsorbent dosage conditions and the results were analyzed using adsorption isotherm models, energy models, and kinetic models. The results of the analysis indicate that the adsorption occurring at a fixed adsorbate concentration with a varying adsorbent dosage occur more easily compared to those under a fixed adsorbent dosage with a varying adsorbate concentration. In the second part of the study, the experimental data obtained using fixed bed columns were fit to Bed Depth Service Time, Bohart–Adams, Clark, and Wolborska models, to predict the breakthrough curves and determine the column kinetic parameters. The adsorption properties of the NO3− ions on the PP-g-AA-Am non-woven fabric were differently described by different models for both the batch and fixed bed column process. Therefore, it appears reasonable to assume that the adsorption properties were dominated by multiple mechanisms, depending on the experimental conditions.
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Research Article|
July 07 2015
Applications and limits of theoretical adsorption models for predicting the adsorption properties of adsorbents
Hyun Ju Park;
Hyun Ju Park
1Integrated Research Institute of Construction and Environmental Engineering #35-216, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
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Duc Canh Nguyen;
2Department of Civil and Environment Engineering #35-518, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
E-mail: mrcanhctn@gmail.com
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Choon-Ki Na;
Choon-Ki Na
3Department of Environmental Engineering, Mokpo National University, 61 Dorim, Chungkye Muan, Jeonnam 534-729, South Korea
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Chung-il Kim
Chung-il Kim
1Integrated Research Institute of Construction and Environmental Engineering #35-216, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Republic of Korea
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Water Sci Technol (2015) 72 (8): 1364–1374.
Article history
Received:
March 27 2015
Accepted:
June 10 2015
Citation
Hyun Ju Park, Duc Canh Nguyen, Choon-Ki Na, Chung-il Kim; Applications and limits of theoretical adsorption models for predicting the adsorption properties of adsorbents. Water Sci Technol 1 October 2015; 72 (8): 1364–1374. doi: https://doi.org/10.2166/wst.2015.327
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