Study on sorption of Zn2+ by fly ash, clay and bentonite

XI Yong-hui; ZHAO Hong; HU Zhong-xiong

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Study on sorption of Zn2+ by fly ash, clay and bentonite

更新时间：2026-06-25

- Study on sorption of Zn2+ by fly ash, clay and bentonite
- Vol. 26, Issue 8, (2005)
- 作者机构：
  
  同济大学,上海,200092
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411.1
- Online First：26 December 2013，
  
  Published：2005
- 稿件说明：
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XI Yong-hui, ZHAO Hong, HU Zhong-xiong. Study on sorption of Zn2+ by fly ash, clay and bentonite[J]. 2005, 26(8).
DOI：

XI Yong-hui, ZHAO Hong, HU Zhong-xiong. Study on sorption of Zn2+ by fly ash, clay and bentonite[J]. 2005, 26(8). DOI：

摘要

研究了粉煤灰、粘土、膨润土等从溶液中去除有毒金属离子Zn2+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Zn2+的吸附能力相当，但远大于粘土、粉质粘土。平衡吸附模型充分说明，在高浓度下Zn2+在粉煤灰、粘土、粉质粘土上的吸附符合Langmuir等温线。试验结果亦表明，随着吸附剂中Zn2+含量的增加，粉煤灰等吸附剂对Zn2+吸附的百分率均呈减小的趋势。

Abstract

Sorption of Zn2+ from aqueous solutions by fly ash

clay and bentonite was investigated. The results of kinetic experiments showed that the sorption process of Zn2+ was rapid. The sorption data showed that sorption capacity of Zn2+ by fly ash and bentonite was much larger than those by clay and silty clay; and the sorption capacity of Zn2+ by fly ash was equal to that by bentonite. Equilibrium modeling of sorption showed that at high concentration，the sorption of Zn2+ by fly ash

clay and silty clay were fitted to a Langmuir isotherm. The results also showed that when Zn2+ loading in adsorbents increased，the percentage of Zn2+ sorption by adsorbents such as fly ash decreased.

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