Zeolite (FZ), prepared from fly ash, was immobilized with polyacrylonitrile (PAN) to fabricate PAN/FZ beads. The prepared PAN/FZ beads were characterized by scanning electron microscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy. The optimum ratio to prepare PAN/FZ beads was 0.3 g of PAN to 0.3 g of FZ. The diameter of the prepared PAN/FZ beads was about 3 mm. Sr and Cu ion adsorption experiments were conducted with PAN/FZ beads. A pseudo-second-order model fit the kinetic data for Sr and Cu ion adsorption by PAN/FZ beads well. The equilibrium data fitted well with the Langmuir isotherm model, and the maximum adsorption capacities were 96.5 mg/g and 74.6 mg/g for the Sr and Cu ions, respectively. Additionally, the values of thermodynamic parameters such as Gibbs free energy (ΔGo), enthalpy (ΔHo) and entropy (ΔSo) were determined. The positive values of ΔHo revealed the endothermic nature of the adsorption process and the negative values of ΔGo were indicative of the spontaneity of the adsorption process.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 재료
  2.2. 흡착제 제조
  2.3. 실험 방법
 3. 실험 결과
  3.1. PAN/FZ 흡착제의 특성
  3.2. 시간에 따른 흡착량 변화
  3.3. 흡착속도모델
  3.4. 온도 변화에 따른 흡착량 변화
  3.5. 열역학적 해석
 4. 결 론
 REFERENCES

• 감상규(제주대학교 환경공학과, Department of Environmental Engineering, Jeju National University) | Sang-Kyu Kam
• 이창한(부산가톨릭대학교 환경행정학과, Department of Environmental Administration, Catholic University of Pusan) | Chang-Han Lee
• 정갑섭(동명대학교 식품영양학과, Department of Food Science & Nutritional, Tongmyong University) | Kap-Seop Jeong
• 이민규(부경대학교 화학공학과, Department of Chemical Engineering, Pukyong National University) | Min-Gyu Lee Corresponding author