Determination of adsorptive properties of clay/water system:: methylene blue sorption

被引：221
作者：
Gürses, A [1 ]
Karaca, S
Dogar, Ç
Bayrak, R
Açikyildiz, M
Yalçin, M
机构：
[1] Ataturk Univ, KK Egitim Fak, Dept Chem, TR-25240 Erzurum, Turkey
[2] Ataturk Univ, Fen Edeniyat Fak, Dept Chem, TR-25240 Erzurum, Turkey
[3] Ataturk Univ, Dept Sci, Erzincan Egitim Fak, TR-24030 Erzincan, Turkey
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2004年 / 269卷 / 02期
关键词：
adsorption isotherms; clay; adsorption; methylene blue;
D O I：
10.1016/j.jcis.2003.09.004
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：
In this study, adsorption of methylene blue onto clay was investigated. The effect of adsorption time and temperature on the adsorption process was studied. To reveal the adsorptive characteristics of the clay studied, porosity and BET surface area measurements were made. It was observed that the adsorption capacity decreases with increasing temperature, and adsorption equilibrium was attained within 1 h. It was found that the data fit well to Langmuir, Halsey, Henderson, and Harkins-Jura models but experimental data deviate significantly from BET and Freundlich models at especially high concentrations. Furthermore, isosteric adsorption enthalpy and entropy are calculated as -7.99 kJ mol(-1) and 25.41 J K-1 mol(-1), respectively. (C) 2003 Elsevier Inc. All rights reserved.
引用
收藏
页码：310 / 314
页数：5
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