| 镁铝阴离子粘土对砷酸根离子的吸附作用 |
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| 引用本文： | 彭书传,杨远盛,陈天虎,姜绍通,XU Huifang. 镁铝阴离子粘土对砷酸根离子的吸附作用[J]. 硅酸盐学报, 2005, 33(8): 1023-1027 |
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| 作者姓名： | 彭书传 杨远盛 陈天虎 姜绍通 XU Huifang |
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| 作者单位： | 1. 合肥工业大学,资源与环境工程学院,合肥,230009
2. Wisconsin大学,地质与地球物理系,Madison WI 53706,美国 |
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| 基金项目： | 国家自然科学基金（40472026）资助项目. |
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| 摘 要： | 利用共沉淀水热法制备了镁铝阴离子粘土材料，研究了其水溶液对砷酸根离子的去除能力。结果表明：镁铝阴离子粘土对砷酸根离子具有较高的去除率和吸附容量、较快的吸附速度。砷酸根离子的吸附平衡数据很好的符合Freundlich型吸附等温方程。同时，吸附动力学数据完全符合Lagergren二级速度方程。吸附砷酸根离子后的阴离子粘土材料，用稀NazCO3溶液可以很好的洗脱再生。阴离子粘土对砷酸根离子的吸附属于层间离子交换作用。
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| 关 键 词： | 阴离子粘土 砷酸根 吸附作用 |
| 文章编号： | 0454-5648（2005）08-1023-05 |
| 收稿时间： | 2004-12-24 |
| 修稿时间： | 2005-04-18 |
ADSORPTION OF ARSENATE ANION BY Mg- Al ANIONIC CLAY |
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| Peng Shuchuan,YANG Yuansheng,Chen Tianhu,Jiang Shaotong,XU Huifang. ADSORPTION OF ARSENATE ANION BY Mg- Al ANIONIC CLAY[J]. Journal of The Chinese Ceramic Society, 2005, 33(8): 1023-1027 |
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| Authors: | Peng Shuchuan YANG Yuansheng Chen Tianhu Jiang Shaotong XU Huifang |
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| Abstract: | Mg - Al anionic clay was prepared by coprecipitation and the hydrothermal method, and the removal of arsenate anions from the clay's aqueous solution was investigated. The results show that Mg - Al anionic clay has high removal efficiency, high capacity adsorption and a high rate of adsorption for arsenate anion. The adsorption equilibrium data for arsenate anions can be described by the Freundlich isothermal equation. At the same time, the dynamic adsorption data are well followed the Lagergren pseudo-second rate equation. The results of regeneration studies show that the diluted Na2CO3 solution is an efficient agent for regenerating anionic clay after As(V) loading. The mechanism for arsenate removal can be classified as ion exchange in the interlayer of anionic clay. |
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| Keywords: | anionic clay arsenate adsorption |
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