Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Adsorption Characterization of Cd by Activated Carbon containing Hydroxyapatite using Response Surface Methodology (RSM)

반응표면분석법을 이용한 Hydroxyapatite 첨가 활성탄에서의 Cd 흡착특성에 관한 연구

  • An, Sang-Woo (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Yoo, Ji-Young (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Choi, Jae-Young (Korea Institute of Science and Technology, Gangneung Branch) ;
  • Park, Jae-Woo (Department of Civil and Environmental Engineering, Hanyang University)
  • 안상우 (한양대학교 건설환경공학과) ;
  • 유지영 (한양대학교 건설환경공학과) ;
  • 최재영 (한국과학기술연구원 강릉분원) ;
  • 박재우 (한양대학교 건설환경공학과)
  • Received : 2009.08.11
  • Accepted : 2009.10.19
  • Published : 2009.11.30
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Abstract

Cadmium (Cd) adsorption onto the activated carbon containing hydroxyapatite (HAP) was investigated in batch experiments and response surface methodology (RSM) using the Box-Behnken methods were applied to the experimental results. Cd adsorption with different HAP mass ratio of from 10% to 30%. With more HAP, Cd was more adsorbed. These results suggest that the higher HAP mass causes an increase of the ion exchange potential of the HAP sorbent. Equilibrium experimental results from Cd adsorption was fitted to Langmuir and Freundlich isotherm models. Cd adsorption on HAP sorbent were found to follow the Freundlich isotherm model well in the initial adsorbate concentration range. Also, Cd adsorption was a function of the HAP mass ratio ($x_1$), initial Cd concentration ($x_2$), and initial pH ($x_3$) from the application of the RSM. Statistical results showed the order of significance of the independent variables to be initial Cd concentration > HAP mass ratio > initial pH.

Keywords

References

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