| 粉煤灰粘土粉质粘土膨润土对镍离子吸附试验研究 |
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| 引用本文： | 席永慧,赵红,胡中雄.粉煤灰粘土粉质粘土膨润土对镍离子吸附试验研究[J].岩土工程学报,2005,27(1):59-63. |
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| 作者姓名： | 席永慧 赵红 胡中雄 |
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| 作者单位： | 同济大学建筑工程系；同济大学材料科学与工程学院；同济大学地下建筑与工程系 上海200092；上海200092； |
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| 基金项目： | 上海市科技发展基金资助项目(022312202) |
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| 摘 要： | 研究了粉煤灰 、粘土、粉质粘土和膨润土从溶液中去除有毒金属镍离子的吸附过程。动态试验显示吸附过程是快速的。吸附试验结果表明,粉煤灰、膨润土对镍离子的吸附能力远大于粘土和粉质粘土,且粉煤灰大于膨润土。平衡吸附模型充分说明在高浓度下,镍离子在粉煤灰 、粘土、粉质粘土及膨润土上的吸附最符合 Langmuir 等温线, 在粘土和粉质粘土上的吸附也可用线性和 Freundlich 等温线来表示。试验结果还表明:随着吸附剂中镍离子含量的增加,粉煤灰等吸附剂对镍离子吸附的百分数均呈减小的趋势。
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| 关 键 词： | 粉煤灰 镍离子 吸附 等温线 |
| 文章编号： | 1000-4548(2005)01-0059-05 |
Study on the adsorption of Ni2+ by fly ash, clay,silty clay and bentonite |
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| XI Yonghui,ZHAO Hong,HU Zhongxiong.Study on the adsorption of Ni2+ by fly ash, clay,silty clay and bentonite[J].Chinese Journal of Geotechnical Engineering,2005,27(1):59-63. |
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| Authors: | XI Yonghui ZHAO Hong HU Zhongxiong |
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| Affiliation: | 1.Department of Building Engineering Tongji University Shanghai 200092 China 2. School of Material Science and Engineering Tongji University Shangha 200092 China 3. Department of Geotechnical Engineering Tongji University Shanghai 200092 China |
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| Abstract: | Adsorption of Ni(Ⅱ) from aqueous solutions by fly ash, clay, silty clay and bentonite was investigated. The results of kineti experiments showed that the adsorption process of Ni(Ⅱ) was rapid. The adsorption data showed that adsorption capacity of Ni(Ⅱ) by fl ash and bentonite was much larger than those by clay and silty clay, and adsorption capacity of Ni(Ⅱ) by fly ash was larger than that b bentonite. Equilibrium modeling of the adsorption showed that at high concentration, the adsorption of Ni(Ⅱ) by fly ash, clay, silty cla and bentonite was fitted to a Langmuir isotherm, while the adsorption of Ni(Ⅱ) by clay and silty clay was also fitted to linear an Freundlich isotherm. The results also showed that when Ni(Ⅱ) loading in absorbents increased,the percentage of Ni(Ⅱ) adsorption b absorbents such as fly ash decreased. |
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| Keywords: | fly ash Ni(Ⅱ) adsorption isotherm |
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