Adsorption of Chromium onto Activated Alumina: Kinetics and Thermodynamics Studies

被引：5
|
作者：
Marzouk, Ikhlass [1 ,2 ]
Dammak, Lassaad [2 ]
Hamrouni, Bechir [1 ]
机构：
[1] Fac Sci Tunis, UR Traitement & Dessalement Eaux, Manar Ii 2092, Tunisia
[2] ICMPE, F-94320 Thiais, France
来源：
WATER ENVIRONMENT RESEARCH | 2013年 / 85卷 / 02期
关键词：
Chromium (VI); activated alumina; adsorption isotherm; adsorption kinetic; thermodynamic; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTION; WASTE-WATER; REMOVAL; CR(VI); SORPTION; CARBON; DYE; BIOSORPTION; IONS;
D O I：
10.2175/106143012X13560205144137
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, the removal of chromium (VI) by adsorption on activated alumina was investigated and the results were fitted to Langmuir, Freundlich, Dubinin-Redushkevich, and Temkin adsorption models at various temperatures. The constants of each model were evaluated depending on temperature. Thermodynamic parameters for the adsorption system were determined at 10, 25 and 40 degrees C. (Delta H degrees = -21.18 kJ.mol(-1); Delta G degrees = -8.75 to -7.43 kJ.mol(-1) and Delta S degrees = -0.043 kJ.K-1.mol(-1)). The obtained values showed that chromium (VI) adsorption is a spontaneous and exothermic process. The kinetic process was evaluated by first-order, second-order and Elovich kinetic models. Water Environ. Res., 85, 99 (2012).
引用
收藏
页码：99 / 104
页数：6
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