| REMOVAL OF AMMONIUM ION FROM AQUEOUS SOLUTIONS USING A DOMESTIC NATURAL ZEOLITE |
| Hyun-Suk Lee†, and Hwan-Gi Kim |
| Faculty of Civil and Environmental Engineering, Chonbuk National University |
Corresponding Author:
Hyun-Suk Lee ,Tel: +82-63-620-6353, Fax: +82-63-620-6386, Email: hyunsukleel7@hanmail.net
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Received: November 12, 2002; Accepted: March 2, 2003. |
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| ABSTRACT |
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A domestic natural zeolite was pretreated with hydrogen chloride, sodium hydroxide, and sodium chloride to improve the adsorption capacities of ammonium ion from an aqueous solutions. The pretreated natural zeolite was characterized by X-ray diffraction (XRD) and BET experiments. From experimental data, it was shown that the pretreatment with sodium chloride provided the highest capacity for the removal of ammonium ion. Adsorption equilibrium data were correlated with Langmuir, Freundlich, and Sips isotherms. Adsorption and desorption dynamics were investigated in a fixed-bed charged with natural zeolite, that had been pretreated with sodium chloride. A simple dynamic model was formulated in order to describe adsorption breakthrough curves of ammonium ion. |
| Keywords:
adsorption isotherm | ammonium ion | domestic natural zeolite | dynamic model | pretreatment |
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