Evaluation of Exchange Capacities of Ca²⁺ and Mg²⁺ions by Na-A Zeolite Synthesized from Coal Fly Ash

Chang-Han Lee, Min-Gyu Lee^1)*

Department of Environmental Adminstration, Catholic University of Pusan, Busan 46252, Korea
¹⁾Department of Chemical Engineering, Pukyong National University, Busan 48547, Korea

E-mail: mglee@pknu.ac.kr

^*Corresponding author: Min-Gyu Lee, Department of Chemical Engineering, Pukyong National University, Busan 48574, Korea Phone: +82-51-629-6435

Abstract

In this study, zeolite (Z-C1) was synthesized using a fusion/hydrothermal method from coal fly ash. The morphological structures of Z-C1 were confirmed to be highly crystalline with a cubic crystal structure. Exchange capacities of Ca2+ and Mg2+ ions in a single and a mixed solution reached equilibrium within 120 min. The exchange kinetics of these ions were well predicted by the pseudo-second-order rate equation. The exchange isotherms of the Ca2+ and Mg2+ ions matched the Langmuir isotherm better than the Freundlich isotherm. The maximum cation exchange capacities (qm) obtained by the Langmuir isotherm model were 2.11 mmol/g (84.52 mg/L) and 1.13 mmol/g (27.39 mg/L) for the Ca2+ and Mg2+ ions, respectively.

석탄비산재로 합성한 Na-A 제올라이트의 Ca²⁺와 Mg²⁺ 이온교환 성능평가

이창한, 이민규^1)*

부산가톨릭대학교 환경행정학과, ¹⁾부경대학교 화학공학과

Evaluation of Exchange Capacities of Ca²⁺ and Mg²⁺ions by Na-A Zeolite Synthesized from Coal Fly Ash

Abstract

석탄비산재로 합성한 Na-A 제올라이트의 Ca²⁺와 Mg²⁺ 이온교환 성능평가

초록

Figure

Table

Evaluation of Exchange Capacities of Ca2+ and Mg2+ions by Na-A Zeolite Synthesized from Coal Fly Ash

Abstract

석탄비산재로 합성한 Na-A 제올라이트의 Ca2+와 Mg2+ 이온교환 성능평가

초록

Figure

Table

Evaluation of Exchange Capacities of Ca²⁺ and Mg²⁺ions by Na-A Zeolite Synthesized from Coal Fly Ash

석탄비산재로 합성한 Na-A 제올라이트의 Ca²⁺와 Mg²⁺ 이온교환 성능평가