The feasibility of PS-D2EHPA/TBP beads prepared by immobilizing two extractants D2EHPA and TBP in polysulfone to remove Sr(II) from aqueous solution was investigated in batch system. Batch experiments were carried out to study equilibrium isotherms, kinetics, and thermodynamics. Equilibrium data were fitted using Langmuir, Freundlich, Redlich– Peterson, and Dubinin-Radushkevich equation models at temperatures of 298 K, 313 K, and 328 K. The removal capacity of Sr(II) by PS-D2EHPA/TBP beads obtained from Langmuir model was 2.41 mg/g at 298 K. The experimental data were well represented by pseudo-second-order model. The removal process of Sr(II) by PS-D2EHPA/TBP beads prepared in this study was found to be feasible, endothermic, and spontaneous.

Abstract
 1. 서 론
 2. 실험 재료 및 방법
  2.1. 실험 재료
  2.2. 실험 방법
 3. 실험 결과 및 고찰
  3.1. pH에 따른 제거량 변화
  3.2. 시간에 따른 제거량 변화
  3.3. 속도 모델
  3.4. 등온식
  3.6. 열역학적 해석
 4. 결론
 REFERENCE

• 이민규(부경대학교 화학공학과) | Min-Gyu Lee (Department of Chemical Engineering, Pukyong National University) Corresponding author
• 전진우(부경대학교 화학공학과) | Jin-Woo Jeon (Department of Chemical Engineering, Pukyong National University)
• 감상규(제주대학교 환경공학과) | Sang-Kyu Kam (Department of Environmental Engineering, Jeju National University)