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| Preparation of Nano-zero-valent Iron - Hydroxylapatite Coated Activated Carbon and Its Adsorption Properties for Mn(Ⅱ) |
| Received:July 08, 2022 Revised:July 19, 2022 |
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| DOI：doi：10.3969/j.issn.1007-7545.2022.11.015 |
| KeyWord:activated carbon; nano-zero-valent iron; hydroxyapatite; Mn(Ⅱ); adsorption property; kinetics |
| Author | Institution |
| WANG Xin-yu |
东华理工大学 水资源与环境工程学院 |
| ZHANG Wei-min |
东华理工大学 核资源与环境国家重点实验室 |
| WANG Yu-gang |
东华理工大学 水资源与环境工程学院 |
| LU Qi-yuan |
东华理工大学 水资源与环境工程学院 |
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| Abstract: |
| Activated carbon-supported zero-valent iron-hydroxyapatite(AC@Fe0-HAP) composites were prepared by liquid phase reduction method, and the effects of pH value, AC@Fe0-HAP dosage, initial concentration of Mn(Ⅱ), and reaction time on adsorption of Mn(Ⅱ) by AC@Fe0-HAP were investigated. The adsorption kinetics model and isothermal adsorption curve model were used to further understand adsorption mechanism of the composites. The results show that when pH value is 5, temperature is 25 ℃, initial concentration of Mn(Ⅱ) is 5 mg/L, and dosage is 0.10 g, the adsorption effect of AC@Fe0-HAP for Mn(Ⅱ) is the best, the adsorption equilibrium is reached at the reaction time of 120 min, and the adsorption capacity is 1.86 mg/g. The adsorption of Mn(Ⅱ) by AC@Fe0-HAP accords with Langmuir isotherm model and quasi-second-order kinetic model. The adsorption process is monolayer adsorption and chemical adsorption. |
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