Batch adsorption tests were performed to evaluate the applicability of adsorption kinetic model by using hydrogel chitosan bead crosslinked with glutaraldehyde (HCB-G) for Cu(II) as cation and/or phosphate as anion. Pseudo first and second order model were applied to determine the sorption kinetic property and intraparticle and Boyd equation were used to predict the diffusion of Cu(II) and phosphate at pore and boundary-layer, respectively. According to the value of theoretical and experimental uptake of Cu(II) and phosphate, pseudo second order is more suitable. On comparison with the value of adsorption rate constant (k), phosphate kinetic was 2-4 times faster than that of Cu(II) at any experimental condition indicating the electrostatic interaction between NH3 + and phosphate is dominated at the presence of single component. However, when Cu(II) and phosphate simultaneously exist, the value of k for phosphate was sharply decreased and then the difference was not significant. Both diffusion models confirmed that the sorption rate was controlled by film mass transfer at the beginning time (t < 3 hr) and pore diffusion at next time section (t > 6 hr).

ABSTRACT
 1. 서 론
 2 실험 재료 및 방법
  2.1 흡착제 개발
  2.2 HCB-G 특성
  2.3 흡착실험
  2.4 실험 분석
 3 결과 및 고찰
  3.1 키토산 비드의 특성
  3.2 동력학적 흡착 특성
  3.3 확산모델
 4. 결 론
 References

• 안병렬(상명대학교 건설시스템공학과) | Byungryul An (Department of Civil Engineering, Sangmyung University) Corresponding author