Adsorption of uranium on halloysite

被引：48

作者：

Kilislioglu, A ^{[1
]}

Bilgin, B ^{[1
]}

机构：

[1] Istanbul Univ, Fac Engn, Chem Dept Avcilar, Istanbul, Turkey

来源：

RADIOCHIMICA ACTA | 2002年 / 90卷 / 03期

关键词：

uranium(VI); adsorption; clay; aqueous solution; kinetics;

D O I：

10.1524/ract.2002.90.3_2002.155

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Adsorption of uranium (U(VI)) from aqueous solutions on halloysite type clay was studied as a function of amount of adsorbent, initial concentration and pH. The values of adsorption data were fitted to Freundlich, Langmuir and Dubinin-Radushkevich (D-R) adsorption isotherms, The mean energy of adsorption was calculated as 5.91 kJ/mol from D-R adsorption isotherm. Lagergren and Ban-ham equation has been used for dynamic modelling of process and the rate constants of adsorption of uranium on halloysite type clay were calculated at 293, 313 and 333 K. In order to explain the mechanism of adsorption reaction, the rate constants were calculated at high and low uranium concentrations. Adsorption reaction was studied at 293, 303, 313, 323 and 333 K for halloysite type clay and also thermodynamic constants have been calculated. The results show that the adsorption reaction was endothermic and more spontaneous at high temperature.

引用

页码：155 / 160

页数：6

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