Adsorption kinetics of methylene blue from aqueous solutions onto palygorskite

被引：0
|
作者：
Peng, Shuchuan
Wang, Shisheng
Chen, Tianhu [1 ]
Jiang, Shaotong
Huang, Chuanhui
机构：
[1] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China
[2] Chinese Acad Sci, Inst Soil Sci, Dept Soil Chem & Environm Protect, Nanjing 210008, Peoples R China
[3] Univ Sci & Technol China, Dept Chem, Hefei 230009, Anhui, Peoples R China
来源：
ACTA GEOLOGICA SINICA-ENGLISH EDITION | 2006年 / 80卷 / 02期
关键词：
purified palygorskite; adsorption; methylene blue; kinetics;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The adsorption kinetics of methylene blue from aqueous solutions on purified palygorskite was investigated. The kinetics data related to the adsorption of methylene blue from aqueous solutions are in good agreement with the pseudo-second order equation in ranges of initial concentration of 120-210 mg/L, oscillation speed of 100-200 r/min and temperature of 298-328K. The experimental results show that methylene blue is only adsorbed onto the external surface of purified palygorskite, and the apparent adsorption activation energy is 13.92 kJ/mol. The relatively low apparent adsorption activation energy suggests that the adsorption of methylene blue involves in not only a chemical, but also a physical adsorption process, and it is controlled by the combination of chemical adsorption and liquid-film diffusion.
引用
收藏
页码：236 / 242
页数：7
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