European Journal of Chemistry 2014, 5(2), 209-213. doi:10.5155/eurjchem.5.2.209-213.948

Study of the adsorption of Co(II) on the chitosan-hydroxyapatite


Zhiguang Ma (1,*) , Mengchao Liu (2) , Jianghong Li (3) , Yinan Song (4) , Suwen Liu (5)

(1) College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Hebei University, Baoding 071002, China
(2) College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Hebei University, Baoding 071002, China
(3) College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Hebei University, Baoding 071002, China
(4) College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Hebei University, Baoding 071002, China
(5) College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Hebei University, Baoding 071002, China
(*) Corresponding Author

Received: 18 Oct 2013, Accepted: 16 Dec 2013, Published: 30 Jun 2014

Abstract


The adsorption of cobalt ions (Co2+) from aqueous solution onto chitosan-hydroxyapatite composite is investigated in this study. The effects of adsorption time, initial concentration, temperature, and pH are studied in details. Kinetics and thermodynamics of the adsorption of Co2+ onto the chitosan-hydroxyapatite are also investigated and the adsorption kinetics is found to follow the pseudo-second-order model with an activation energy (Ea) of 10.73 kJ/mol. Thermodynamic studies indicates that the adsorption follows the Langmuir adsorption equation. The value of entropy change (∆Sө) and enthalpy change (∆Hө) are found to be 83.50 and 18.09 kJ/mol, respectively. The Gibbs free energy change (∆Gө) is found to be negative at all fives temperatures, demonstrating that the adsorption process is spontaneous and endothermic.

 


Keywords


Cobalt; Kinetics; Chitosan; Adsorption; Hydroxyapatite; Thermodynamics

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DOI: 10.5155/eurjchem.5.2.209-213.948

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How to cite


Ma, Z.; Liu, M.; Li, J.; Song, Y.; Liu, S. Eur. J. Chem. 2014, 5(2), 209-213. doi:10.5155/eurjchem.5.2.209-213.948
Ma, Z.; Liu, M.; Li, J.; Song, Y.; Liu, S. Study of the adsorption of Co(II) on the chitosan-hydroxyapatite. Eur. J. Chem. 2014, 5(2), 209-213. doi:10.5155/eurjchem.5.2.209-213.948
Ma, Z., Liu, M., Li, J., Song, Y., & Liu, S. (2014). Study of the adsorption of Co(II) on the chitosan-hydroxyapatite. European Journal of Chemistry, 5(2), 209-213. doi:10.5155/eurjchem.5.2.209-213.948
Ma, Zhiguang, Mengchao Liu, Jianghong Li, Yinan Song, & Suwen Liu. "Study of the adsorption of Co(II) on the chitosan-hydroxyapatite." European Journal of Chemistry [Online], 5.2 (2014): 209-213. Web. 20 Aug. 2019
Ma, Zhiguang, Liu, Mengchao, Li, Jianghong, Song, Yinan, AND Liu, Suwen. "Study of the adsorption of Co(II) on the chitosan-hydroxyapatite" European Journal of Chemistry [Online], Volume 5 Number 2 (30 June 2014)

DOI Link: https://doi.org/10.5155/eurjchem.5.2.209-213.948

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