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Adsorption enthalpies of sodium dodecyl sulphate onto carbon blacks in the low concentration range

被引：25
作者：
González-García, CM
González-Martín, ML
Denoyel, R
Gallardo-Moreno, AM
Labajos-Broncano, L
Bruque, JM
机构：
[1] Univ Extremadura, Dept Phys, Badajoz 06071, Spain
[2] Univ Extremadura, Dept Chem & Energy Engn, E-06071 Badajoz, Spain
[3] Univ Aix Marseille 1, CNRS, F-13397 Marseille 20, France
来源：
CARBON | 2005年 / 43卷 / 03期
关键词：
carbon black; adsorption; heat of adsorption;
D O I：
10.1016/j.carbon.2004.10.021
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：
Adsorption enthalpies of sodium dodecyl sulphate onto a set of carbon blacks from aqueous solutions in the low concentration range are presented. The surfactant was found to adsorb on the carbon surface exothermally in the whole studied coverage. From the calorimetric results and the analysis of the adsorption isotherms by a double Langmuir equation, a model of the adsorption mechanism in these systems is suggested. The adsorption of the surfactant onto the carbon blacks can be explained by two energetically distinct steps corresponding to the adsorption of SDS in two different types of porosity. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：567 / 572
页数：6
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