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DOI : ,    Vol.20, No.6, 41 ~ 53, 2012
Title
Adsorption Characteristics of Ammonium Ion onto the Na-Zeolite Synthesized by Employing the Fly Ash from Thermoelectric Plant
유정민 Jung Min Yoo , 손정수 Jung Soo Sohn , 김동수 Dong Su Kim
Abstract
This study was aimed at development of Na-zeolite which can effectively remove ammonia in wastewater discharged into streams and lakes. Na-zeolite was synthesized by using the fly ash generated from a thermoelectric plant. The fly ash was heated and activated by NaOH solution. The synthesized Na-zeolite was utilized to remove NH₄+ ion from NH₄NO₃ solution. The ammonium ion exchange capacity of Na-zeolite was investigated and the effects of zeolite weight, initial NH₄+ ion concentration and pH on ion exchange capacity were examined. The adsorption capacity of NH₄+ ion onto Na-zeolite was observed to be enlarged as the amount of Na-zeolite and initial NH₄+ ion concentration increases and this process was shown to be a second order reation. The adsorption behavior NH₄+ ion at equilibrium was explained well by Freundlich adsorption isotherm.
Key Words
Fly ash, Na-zeolite, Ammonium ion, Adsorption
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