Heterogeneity of activated carbons with different surface chemistry in adsorption of phenol from aqueous solutions

被引：61

作者：

Laszlo, K. ^{[1
]}

Podkoscielny, P.

Dabrowski, A.

机构：

[1] Budapest Univ Technol & Econ, Dept Phys Chem, H-1521 Budapest, Hungary

[2] Marie Curie Sklodowska Univ, Fac Chem, Dept Theoret Chem, PL-20031 Lublin, Poland

来源：

APPLIED SURFACE SCIENCE | 2006年 / 252卷 / 16期

基金：

匈牙利科学研究基金会;

关键词：

liquid-phase adsorption; activated carbon; phenol; heterogeneity; porosity;

D O I：

10.1016/j.apsusc.2005.07.027

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 is investigated on the basis of adsorption isotherms of phenol from dilute aqueous solutions at different values of pH in the solution. The original carbon studied was prepared from polyethyleneterephtalate (PET). Its various oxygen surface functionalities were systematically changed by additional nitric acid and heat treatments. The Dubinin-Astakhov adsorption-isotherm equation was used to evaluate the parameters characterizing the adsorption of phenol from dilute water solutions on activated carbon surfaces. Adsorption energy distribution functions were calculated by the INTEG algorithm, based on a regularization method. Analysis of distribution functions for activated carbons provides significant comparative information about their energetic heterogeneity. Moreover, a comparison of the resulting energies obtained from the distributions can be made with enthalpic data. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：5752 / 5762

页数：11

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