| 类水滑石Mg/Zn/Al焙烧产物对高氯酸盐的吸附 |
| 摘要点击 3683 全文点击 1650 投稿时间：2013-11-13 修订日期：2014-02-24 |
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| 中文关键词 类水滑石Mg/Zn/Al 焙烧 吸附 动力学 高氯酸盐 |
| 英文关键词 Mg/Zn/Al layered double hydroxides calcined adsorption kinetics perchlorate |
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| 中文摘要 |
| 利用类水滑石Mg/Zn/Al的焙烧产物对ClO4-进行吸附性能研究，通过类水滑石表面结构X射线衍射分析并探讨其吸附等温、动力学模型，并研究了焙烧温度、Mg/Zn/Al质量比、溶液pH值、吸附时间及吸附剂投加量等因素对类水滑石Mg/Zn/Al吸附ClO4-的性能影响. 结果表明在500℃下焙烧4 h，Mg/Zn/Al质量比为2：1：1的类水滑石对ClO4-去除效果较好，吸附容量最大且对溶液pH值有较好的适用范围. 经500℃焙烧的类水滑石吸附ClO4-的动力学拟合结果符合二级反应动力学模型，吸附等温线符合Langmuir及Freundlich吸附等温模型. |
| 英文摘要 |
| The adsorption capacity of perchlorate by Mg/Zn/Al layered double hydroxides was investigated. The samples were characterized by X-ray diffraction (XRD) and the adsorption isothermal model and dynamic model were discussed. The effect of calcination temperature, Mg/Zn/Al molar ratio, pH value of solution, adsorption time and dosage on the adsorption capacity of samples were studied. The experiment results showed that the removal ratio and adsorption capacity reached the highest and the pH value had good applicability when the molar ratio was Mg/Zn/Al=2:1:1. The adsorption of perchlorate basically conformed to the pseudo-second kinetics and Langmuir, Freundlich isotherm model. |
