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| Preparation of Nanoscale Zero-Valent Iron-Hydroxyapatite Nanocomposites with Different Calcium Sources and Their Adsorption Properties for Mn(Ⅱ) |
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Received:April 20, 2023
Revised:April 23, 2023
Accepted:May 05, 2023
Published Online:September 04, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.08.018 |
| KeyWord:nanoscale zero-valent iron (nZVI); hydroxyapatite (HAP); manganese; adsorption mechanism; kinetics |
| Author | Institution |
| LI Qianmin |
东华理工大学核资源与环境国家重点实验室;东华理工大学水资源与环境工程学院 |
| ZHANG Weimin |
东华理工大学核资源与环境国家重点实验室 |
| CHEN Jiahong |
东华理工大学核资源与环境国家重点实验室 |
| LU Qiyuan |
东华理工大学核资源与环境国家重点实验室 |
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| Abstract: |
| Two nanoscale zero-valent iron-hydroxyapatite nanocomposites (N-FH and C-FH) with different calcium sources were prepared by liquid-phase reduction method. Through static batch experiments, the effects of solution pH value, reaction time, initial manganese concentration, and reaction temperature on the performance of N-FH and C-FH adsorption of Mn(Ⅱ) in water were studied. Combined with microscopic characterization of composite material before and after adsorption, and the adsorption mechanism was further analyzed by adsorption kinetic model. The results show that the maximum adsorption capacity of Mn(Ⅱ) adsorbed in water by N-FH and C-FH is 59.679 2 mg/g and 59.290 4 mg/g respectively under the conditions including 0.125 g/L of composite material, initial manganese concentration of 10 mg/L, pH value of the solution to be set to 5.0, and reaction time of 720 min,. The adsorption process of Mn(Ⅱ) by N-FH and C-FH is more consistent with the quasi-second-order kinetic model (R2>0.99) and Langmuir model (R2>0.98), and the adsorption mechanism is monolayer chemical adsorption. |
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