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| Study on Adsorption of V(Ⅳ) with D860 Resin |
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Received:July 07, 2016
Revised:July 14, 2016
Accepted:July 15, 2016
Published Online:November 17, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.12.009 |
| KeyWord:ion exchange resin; D860; V(Ⅳ); adsorption; separation; enrichment |
| Author | Institution |
| duanjihua |
武汉理工大学 资源与环境工程学院 |
| Bao Shenxu |
武汉理工大学 资源与环境工程学院 |
| Zhang Yimin |
武汉理工大学 资源与环境工程学院 |
| Zhou Jiayu |
武汉理工大学 资源与环境工程学院 |
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| Abstract: |
| Adsorption characteristics of D860 resin for V(IV) were studied. Effects of pH value, absorption time, temperature, and initial concentration of V(IV) on V(IV)adsorption were investigated. Adsorption thermodynamics, kinetics, isothermal absorption models, and effects of different impurity ions on V(Ⅳ) adsorption were investigated. The results indicate that the optimum pH value is 2.5, and equilibrium time is 8 h for V(Ⅳ) adsorption on D860 resin. Adsorbing capacity improves with increases of temperature and initial concentration of V(Ⅳ). ΔH=3.78 kJ/mol, ΔS=49.44 J/(mol?K), ΔG298K=-10.95 kJ/mol. Pseudo-first order and pseudo-second order kinetic models are used to describe adsorption process of V(Ⅳ), which was controlled by interparticle diffusion. The apparent sorption activation energy is 23.76 kJ/mol. Adsorption of V(Ⅳ) on resin fits Langmuir model. Separation factors of V/Al, V/P, V/Fe are all higher than one. |
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