KINETIC-STUDY OF CR(VI) SORPTION ON MNO2

被引：20

作者：

BHUTANI, MM

MITRA, AK

KUMARI, R

机构：

[1] Department of Chemistry, I. I. T., New Delhi, 110 016, Hauz Khas

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1992年 / 157卷 / 01期

关键词：

D O I：

10.1007/BF02039779

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The kinetics of adsorption of chromate ions has been investigated radiometrically over a wide range of concentration of chromate ions (10(-6)-10(-2) M) and temperature (303-323 K). The kinetics of the process follows essentially a first order rate law with respect to adsorptive concentration and obeys the Freundlich adsorption isotherm in the concentration range studied. In addition, the kinetics of desorption of the preadsorbed species also follows a first order rate law and the activation energy for desorption is greater than that of the adsorption process. On the basis of an adsorption kinetic study, the thermodynamic parameters have been calculated. Infrared spectroscopy has shown the chemical interaction of chromate ions on the surface of MnO2.

引用

页码：75 / 86

页数：12

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