THERMODYNAMICS OF ADSORPTION OF CERIUM ON LEAD DIOXIDE

被引：8

作者：

AFZAL, M ^{[1
]}

AHMAD, H ^{[1
]}

SALEEM, M ^{[1
]}

HASANY, SM ^{[1
]}

机构：

[1] PINSTECH,DIV NUCL CHEM,ISLAMABAD,PAKISTAN

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS | 1994年 / 186卷 / 01期

关键词：

D O I：

10.1007/BF02163243

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Adsorption of cerium on lead dioxide from aqueous solutions has been studied as a function of shaking time, amount of adsorbent, pH, concentration of the adsorbate and temperature. The adsorption process is endothermic and the distribution coefficient (K-D) increases with increasing temperature. The data fit very well the Langmuir, Freundlich, and Dubinin-Raduskevich Isotherms and their corresponding constants were calculated. Delta H degrees and Delta S degrees were calculated from the slope and intercept of plots of lnK(D) vs. 1/T. Delta G degrees values decreases with increasing temperature, showing that the adsorption of Ce(III) is more favorable at high temperature. The endothermacity of the adsorption process is discussed.

引用

页码：63 / 74

页数：12

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