Removal of Orthophosphate by Adsorption onto Activaed Magnesium Oxide in Aqueous Solution
Fa-Zhi Xie
CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, P.R. China ; School of Materials Science and Chemical Engineering, Anhui University of Architecture, Hefei 230022, P.R. China ; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, P.R. China
Gui-Jian Liu
CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, P.R. China
Feng-Chang Wu
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, P.R. China
Guo-Lian Li
CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, P.R. China
Yuan-Rong Zhu
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, P.R. China
Corresponding Author(s) : Gui-Jian Liu
lgj@ustc.edu.cn
Asian Journal of Chemistry,
Vol. 24 No. 9 (2012): Vol 24 Issue 9
In this study, the adsorption properties of an activated magnesium oxide powders via precipitation method for orthophosphate was examined. The effect of different parameters such as pH, contact time, adsorbate concentration and temperature was investigated. The adsorption kinetics data were best described by the pseudo-second-order rate equation and equilibrium was achieved after 40 min. The adsorption isotherm of the activated MgO was approximated by a Langmuir type and the maximum adsorption capacity was 95.24 mg/g. The thermodynamic parameters like DG, DH and DS for the adsorption of phosphate ions have been evaluated and it has been found that the reaction was spontaneous and endothermic in nature.
Keywords
OrthophosphateActivated magnesium oxideAdsorption
Full Article
Generated from XML file
Xie, F.-Z., Liu, G.-J., Wu, F.-C., Li, G.-L., & Zhu, Y.-R. (2012). Removal of Orthophosphate by Adsorption onto Activaed Magnesium Oxide in Aqueous Solution. Asian Journal of Chemistry, 24(9), 4238–4240. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/9590
