Adsorption characteristics of gallic acid on fresh calcium phosphate in sucrose solution

DOI

10.2991/icmia-17.2017.19How to use a DOI?

Keywords

fresh calcium phosphate; gallic acid; adsorption kinetics; adsorption isotherm.

Abstract

The adsorption characteristics of gallic acid on fresh calcium phosphate in sucrose solution were discussed. Three kinetic models, including pseudo-first-order model, pseudo-second-order model and intraparticle diffusion model, were selected to follow the adsorption processes. The results which adsorption reaction occurred in 10% sucrose solution showed that the pseudo-second-order equation provided the best correlation to the experimental data (R2=0.9908~0.9964). Under the initial gallic acid concentration were 25, 50, 75 mg-L-1 in the 10.0% sucrose solution, the adsorption rate of gallic acid on fresh calcium phosphate were 0.0614, 0.0368, 0.0149 g-mg-1-min-1, respectively. Adsorption isotherms curves of gallic acid from different concentrations of sucrose solution on fresh calcium phosphate all conforms to the Langmuir model (R2=0.9919~0.9965). The sucrose solution concentration had effect on the saturated adsorption capacity of gallic acid. The maximum adsorption capacity of gallic acid were 8.4317, 8.0906, 7.7160, 7.3964, 7.0872, 7.0771 mg-g-1 as sucrose concentrations were 0.0%, 0.1%, 0.5%, 1.0%, 5.0% and 10.0%, respectively.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yu-Hong Tian
AU  - Xiang-Li Xu
AU  - Shang-Guang Wu
AU  - Qi-Qiu Wei
AU  - Hao Cheng
PY  - 2017/06
DA  - 2017/06
TI  - Adsorption characteristics of gallic acid on fresh calcium phosphate in sucrose solution
BT  - Proceedings of the 2017 6th International Conference on Measurement, Instrumentation and Automation (ICMIA 2017)
PB  - Atlantis Press
SP  - 104
EP  - 112
SN  - 1951-6851
UR  - https://doi.org/10.2991/icmia-17.2017.19
DO  - 10.2991/icmia-17.2017.19
ID  - Tian2017/06
ER  -