Heterogeneity of activated carbons in adsorption of aniline from aqueous solutions

被引：29
|
作者：
Podkoscielny, R.
Laszlo, K.
机构：
[1] Marie Curie Sklodowska Univ, Fac Chem, Dept Theoret Chem, PL-20031 Lublin, Poland
[2] Budapest Univ Technol & Econ, Dept Phys Chem, H-1521 Budapest, Hungary
来源：
APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 21期
关键词：
heterogeneity; porosity; surface chemistry characterization; adsorption from liquid phase; aniline; activated carbon;
D O I：
10.1016/j.apsusc.2007.04.057
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The heterogeneity of activated carbons (ACs) prepared from different precursors is investigated on the basis of adsorption isotherms of aniline from dilute aqueous solutions at various pH values. The APET carbon prepared from polyethyleneterephthalate (PET), as well as, commercial ACP carbon prepared from peat were used. Besides, to investigate the influence of carbon surface chemistry, the adsorption was studied on modified carbons based on ACP carbon. Its various oxygen surface groups were changed by both nitric acid and thermal treatments. The Dubinin-Astakhov (DA) equation and Langmuir-Freundlich (LF) one have been used to model the phenomenon of aniline adsorption from aqueous solutions on heterogeneous carbon surfaces. Adsorption-energy distribution (AED) functions have been calculated by using an algorithm based on a regularization method. Analysis of these functions for activated carbons studied provides important comparative information about their surface heterogeneity. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：8762 / 8771
页数：10
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