Adsorption of benzene and toluene from aqueous solutions onto activated carbon and its acid and heat treated forms: Influence of surface chemistry on adsorption

被引:268
作者
Wibowo, N. [1 ]
Setyadhi, L. [1 ]
Wibowo, D. [1 ]
Setiawan, J. [1 ]
Ismadji, S. [1 ]
机构
[1] Widya Mandala Surabaya Catholic Univ, Dept Chem Engn, Surabaya 60114, Indonesia
关键词
activated carbon; adsorption; surface chemistry; benzene; toluene;
D O I
10.1016/j.jhazmat.2006.12.011
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The influence of surface chemistry and solution pH on the adsorption of benzene and toluene on activated carbon and its acid and heat treated forms were studied. A commercial coal-based activated carbon F-400 was chosen as carbon parent. The carbon samples were obtained by modification of F-400 by means of chemical treatment with HNO3 and thermal treatment under nitrogen flow. The treatment with nitric acid caused the introduction of a significant number of oxygenated acidic surface groups onto the carbon surface, while the heat treatment increases the basicity of carbon. The pore characteristics were not significantly changed after these modifications. The dispersive interactions are the most important factor in this adsorption process. Activated carbon with low oxygenated acidic surface groups (F-400Tox) has the best adsorption capacity. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:237 / 242
页数:6
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