A novel color removal adsorbent from heterocoagulation of cationic and anionic clays
- 作者：Qiuhong Hu ; Zhiping Xu ; Shizhang Qiao ; Fouad Haghseresht ; Michael Wilson ; Gao Qing Lu
- 关键词：Color removal ; Adsorbent ; Bentonite ; Layered double hydroxide ; Clay
- 刊名：Journal of Colloid and Interface Science
- 出版年：2007
- 期刊代码：125_00219797
- 类别：ch
- 出版时间：1 April 2007
- 卷：308
- 期：1
- 页码：191-199
- 文件大小：611 K
摘要
We report the preparation and characterization of a novel nanocomposite adsorbent for anionic dye removal. The nanocomposite adsorbent was prepared by heterocoagulation of delaminated bentonite and layered double hydroxide (LDH) colloids. The effects of preparation conditions, LDH loading, particle size, and calcination temperature of the modified material on the physicochemical properties of this composite adsorbent have been investigated. The optimal conditions for best Reactive Yellow 2 (RY2) dye removal efficiency are a weight ratio of LDH to bentonite of 1:1, LDH particle size 100 nm, and calcination temperature 673 K. The adsorption equilibrium data can be fitted well by the widely accepted adsorption isotherm models.