| Kinetics and Thermodynamics of the Adsorption of Copper(Ⅱ) onto a New Fe-Si Adsorbent |
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| 引用本文： | 符成,马丛丛,吴琼,于岩.Kinetics and Thermodynamics of the Adsorption of Copper(Ⅱ) onto a New Fe-Si Adsorbent[J].结构化学,2015,34(1):49-55. |
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| 作者姓名： | 符成 马丛丛 吴琼 于岩 |
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| 作者单位： | College of Materials Science and Engineering,Fuzhou University |
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| 基金项目： | Sponsored by the National Natural Science Foundation of China(No.51102047 and No.51472050);Fujian Science Foundation for Distinguished Young Scholars(2012J06011) |
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| 摘 要： | A new kind of Fe-Si adsorbent was synthesized by iron oxide and diatomite after calcining and hydrothermal process. The influences of the initial Cu2+ concentration, p H and adsorption time on the Cu2+ removal efficiency were discussed. Three adsorption empirical kinetics equations and two thermodynamics equations were used to simulate the adsorption process. The microstructures of newly developed copper removal materials and properties of copper removal are characterized in details by SEM and EDS. Adsorption mechanism of the adsorbent was discussed. The suitable p H value for Cu2+ removal is 5.0 to 6.0 and the adsorption capacity increases with increasing the initial Cu2+ concentration. The adsorption kinetics of the adsorbent could be better described by pseudo second order kinetic model, whereas the adsorption isotherms highly conform to the Freundlich equation. The main crystalline phase of the adsorbent is Fe(Si O3) which can build porous structures conducive to the Cu2+ adsorption.
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| 关 键 词： | diatomite copper(Ⅱ) absorption kinetics thermodynamics |
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