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.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료
  2.2. 실험방법
 3. 결과 및 고찰
  3.1. 비산재를 이용한 제올라이트 합성
  3.2. 흡착시간의 영향
  3.3. 흡착속도 해석
  3.4. 이온교환의 영향
  3.5. 흡착 등온 해석
 4. 결 론
 REFERENCES

• 이창한(부산가톨릭대학교 환경행정학과) | Chang-Han Lee
• 이민규(부경대학교 화학공학과) | Min-Gyu Lee Corresponding author