| 天然膨润土对Cr(VI)的吸附动力学及等温线研究 |
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| 引用本文： | 刘 杰,陆建平.天然膨润土对Cr(VI)的吸附动力学及等温线研究[J].有色金属(选矿部分),2012(2). |
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| 作者姓名： | 刘 杰 陆建平 |
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| 作者单位： | 广西大学化学化工学院,广西大学化学化工学院 |
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| 基金项目： | “十一五”国家科技支撑计划重点项目(2009BAB45B01) |
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| 摘 要： | 研究所用膨润土的主要成分为SiO2和Al2O3,属于钙基膨润土,BET表面积为47.98 m2/g。在恒温及恒定pH条件下,用动态吸附法研究了膨润土对Cr(VI)的吸附特性,结果表明其较好符合Lagergren二级吸附速率方程。利用Langmuir等温线方程和Freundlich等温线方程对动态吸附过程进行拟合,发现其吸附等温反应与Langmuir等温线更适合,属于表面单分子吸附。
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| 关 键 词： | 膨润土 动态吸附 Cr(VI) 动力学 等温线 |
| 收稿时间： | 2011/12/2 0:00:00 |
| 修稿时间： | 2011/12/2 0:00:00 |
Studies on Kinetics and Isotherm Adsorption of Cr (VI) on Natural Bentonite |
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| Authors: | LIU Jie and LU Jianping |
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| Abstract: | Bentonite used in this study is mainly composed of SiO2 and Al2O3 and belongs to Ca-smectites. The surface area is 47.98 m2/g. Dynamic adsorptive tests of Cr(VI) were carried out at ambient temperature and constant pH. The adsorption kinetics fit well with Lagergren-second-order. Langmuir isotherm model and Freundlich isotherm model were adopted to describe the dynamic adsorption process. The data determined from the Langmuir model fits better with the experiment, which belongs to surface single molecule adsorption. |
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| Keywords: | bentonite dynamic adsorptive Cr(VI) kinetic isotherm |
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