Adsorption Characterization of Cd by Activated Carbon containing Hydroxyapatite using Response Surface Methodology (RSM)
- Adsorption Characterization of Cd by Activated Carbon containing Hydroxyapatite using Response Surface Methodology (RSM)
- 안상우; 유지영; 최재영; 박재우
- Activated carbon; Adsoption; Cadimium; Hydroxyapatite; Response surface methodology
- Issue Date
- 한국물환경학회지; Journal of Korean Society on Water Quality
- VOL 25, NO 6, 943-950
- 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 (x1), initial Cd concentration (x2), and initial pH (x3) 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.
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