Adsorption studies of caesium on zirconium molybdoarsenate (ZrMAs)

被引：12
作者：
Satyanarayana, J
Murthy, GS [1 ]
Sasidhar, P
机构：
[1] Andhra Univ, Sch Chem, Nucl Chem Sect, Visakhapatnam 530003, Andhra Pradesh, India
[2] BARC, Centralised Waste Management Fac, Kalpakkam 603102, Tamil Nadu, India
来源：
WASTE MANAGEMENT | 1999年 / 19卷 / 06期
关键词：
zirconium molybdoarsenate; caesium; Langmuir isotherm; modified Freundlich isotherm; adsorption;
D O I：
10.1016/S0956-053X(99)00200-7
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The applicability of zirconium molybdoarsenate (ZrMAs) for efficient removal of Cs from aqueous solution by adsorption has been investigated. The kinetics of adsorption of caesium ions has been studied by using radioanalytical procedure over a concentration range (10(-4)-10(-2) mol dm(-3)) and in the temperature range (303-318 K). The results showed that the uptake follows the first order rate law with respect to caesium concentration and obeys Langmuir and Modified Freundlich adsorption isotherms in the concentration studied. The effect of temperature on adsorption equilibrium has been studied and the thermodynamic quantities (Delta H degrees, Delta G degrees and Delta S degrees) has been evaluated. They showed that the process is exothermic in nature. (C) 1999 Elsevier Science Ltd. All rights reserved.
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收藏
页码：427 / 432
页数：6
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