Sorption studies of Cs+ and Ba2+ cations on magnesite

被引：27
作者：
Shahwan, T [1 ]
Suzer, S [1 ]
Erten, HN [1 ]
机构：
[1] Bilkent Univ, Dept Chem, TR-06533 Ankara, Turkey
来源：
APPLIED RADIATION AND ISOTOPES | 1998年 / 49卷 / 08期
关键词：
D O I：
10.1016/S0969-8043(97)10096-3
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The adsorption behavior of Cs+ and Ba2+ cations on magnesite has been studied as a function of time, cation concentration and temperature, utilizing both the radiotracer method and X-ray photoelectron spectroscopy (XPS). Saturation was approached in about 1 day for both cations. The sorption data were found to follow Freundlich type isotherms. Sorption of both Cs+ and Ba2+ cations were found to be exothermic in nature with Delta H-0 (kJ/mol) of -37, -13 and Delta S-0 (kJ/mol.K) of -0.09, -0.009, respectively. Negative Delta G(0) values were obtained for both cations, indicating the spontaneity of their sorption on magnesite. The magnitude of Delta G(0) suggest that ion exchange is the dominating sorption mechanism. (C) 1998 Elsevier Science Ltd. All rights reserved.
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页码：915 / 921
页数：7
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