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Volume 27 Issue 1
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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.
Citation: 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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Study on the adsorption of Ni2+ by fly ash, clay,silty clay and bentonite

  • 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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  • Published Date: January 14, 2005
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  • 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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