Adsorption thermodynamic and kinetic studies of trihalomethanes on multiwalled carbon nanotubes

被引：162
|
作者：
Lu, Chungsying [1 ]
Chung, Yao-Lei [1 ]
Chang, Kuan-Foo [1 ]
机构：
[1] Natl Chung Hsing Univ, Dept Environm Engn, Taichung 402, Taiwan
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2006年 / 138卷 / 02期
关键词：
carbon nanotubes; adsorption; trihalomethanes; kinetics; thermodynamics;
D O I：
10.1016/j.jhazmat.2006.05.076
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Multiwalled carbon nanotubes (MWCNTs) were purified by mixed HNO3/H2SO4 solution and were employed as adsorbents to study adsorption kinetics and thermodynamics of trihalomethanes (THMs) from chlorinated drinking water. The amount of THMs adsorbed onto CNTs decreased with a rise in temperature and high adsorption capacities were found at 5 and 15 C. Under the same conditions, the purified CNTs possess two to three times more adsorption capacities of CHCl3, which accounts for a major portion of THMs in the chlorinated drinking water, than the commercially available PAC suggesting that CNTs are efficient adsorbents. The thermodynamic analysis revealed that the adsorption of THMs onto CNTs is exothermic and spontaneous. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：304 / 310
页数：7
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