Adsorption thermodynamic and desorption studies of U(VI) on modified silica gel (SiAPMS-HL)

被引：15
|
作者：
Incili, Gamze Karayel [1 ]
Aycik, Gul Asiye [1 ]
机构：
[1] Mugla Sitki Kocman Univ, Dept Chem, Fac Sci, TR-48000 Mugla, Turkey
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2014年 / 302卷 / 01期
关键词：
Uranium; Desorption; Thermodynamic; Adsorption isotherms; Silica gel; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; WATER SAMPLES; SELECTIVE ADSORPTION; NATURAL BENTONITE; URANIUM(VI) IONS; PHOSPHORIC-ACID; SORPTION; EXTRACTION; REMOVAL;
D O I：
10.1007/s10967-014-3344-2
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this study, the adsorption process was examined by various isotherm models Langmuir, Freundlich and Dubinin-Radushkevich and equilibrium data were successfully described by Langmuir model. Adsorption thermodynamics of uranium (VI) on modified silica gel (SiAPMS-HL) has been studied within a temperature range from 293 to 333 K and the thermodynamic parameters, such as equilibrium constant (K (D)), standard free energy changes (Delta GA degrees), standard enthalpy change (Delta HA degrees) and standard entropy change (Delta SA degrees), have been obtained. The desorption studies were conducted in batch system to investigate the kind, concentration and volume of the eluent.
引用
收藏
页码：79 / 85
页数：7
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