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| Experimental Study on Adsorption of Manganese from Aqueous Solution by Calcium-Iron Phosphate Composite |
| Received:October 30, 2020 Revised:November 05, 2020 |
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| DOI：doi：10.3969/j.issn.1007-7545.2021.03.024 |
| KeyWord:sol-gel method; phosphate composite; manganese; adsorption; PRB |
| Author | Institution |
| CHEN Jia-hong |
东华理工大学 核资源与环境国家重点实验室 |
| ZHANG Wei-min |
东华理工大学 核资源与环境国家重点实验室 |
| CHEN Jun-hua |
东华理工大学 核资源与环境国家重点实验室 |
| ZHUO Zhen |
东华理工大学 核资源与环境国家重点实验室 |
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| Abstract: |
| A new calcium-iron phosphate composite (CIP) was prepared by sol-gel method. Effects of pH value, reaction time, initial concentration of manganese, and reaction temperature on adsorption of Mn(Ⅱ) in aqueous solution were investigated through static adsorption experiment. The results show that the optimum pH value of CIP adsorption of manganese in aqueous solution is 5. CIP has good adsorption performance for Mn(Ⅱ) in aqueous solution, which can be used as PRB reaction medium to remove manganese from aqueous solution. Adsorption behaviors of CIP on Mn(Ⅱ) in aqueous solution fit well to quasi-second-order kinetic model and Langmuir adsorption isotherm model. The maximum theoretical unit adsorption capacity of CIP is 66.22 mg/g. According to thermodynamic analysis, adsorption of manganese on CIP is a spontaneous, endothermic and entropy increasing process. |
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