Adsorption of benzoic acid onto high specific area activated carbon cloth

被引：62

作者：

Ayranci, E ^{[1
]}

Hoda, N ^{[1
]}

Bayram, E ^{[1
]}

机构：

[1] Akdeniz Univ, Dept Chem, TR-07058 Antalya, Turkey

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 284卷 / 01期

关键词：

adsorption; benzoic acid; carbon cloth; surface charge;

D O I：

10.1016/j.jcis.2004.10.033

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 adsorption of benzoic acid from aqueous solution onto high area carbon cloth at different pH values has been studied. Over a period of 125 min the adsorption process was found to follow a first-order kinetics and the rate constants were determined for the adsorption of benzoic acid at pH 2.0, 3.7, 5.3, 9.1, and 11.0. The extents of adsorption and the percentage coverage of carbon cloth surfaces were calculated at 125 min of adsorption. Adsorption isotherms at pH values of 2.0, 3.7, and 11.0 were derived at 25 degrees C. Isotherm data were treated according to Langmuir and Freundlich equations and the parameters of these equations were evaluated by regression analysis. The fit of experimental isotherm data to both equations was good. It was found that both the adsorption rate and the extent of adsorption at 125 min were the highest at pH 3.7 and decreased at higher or lower pH values. The types of interactions governing in the adsorption processes are discussed considering the surface charge and the dissociation of benzoic acid at different pH values. (c) 2004 Elsevier Inc. All rights reserved.

引用

页码：83 / 88

页数：6

共 26 条

[1] Adsorption and electrosorption at high-area carbon-felt electrodes for waste-water purification: Systems evaluation with inorganic, S-containing anions [J].