Talip Z, Eral M, Hiçsönmez U
Ege University, Institute of Nuclear Sciences, 35100 Bornova-Izmir, Turkey.
J Environ Radioact. 2009 Feb;100(2):139-43. doi: 10.1016/j.jenvrad.2008.09.004. Epub 2008 Nov 20.
The use of expanded perlite for the adsorption of thorium from aqueous solution by batch technique is presented. The effects of particle size, pH of the solution, initial thorium concentration, shaking time, V/m ratio and temperature were determined. It was found that the adsorption capacity increases by the increase in the pH of the suspensions. The rate of thorium adsorption on expanded perlite was observed to be fast in the first hour of the reaction time. Adsorption isotherms were expressed by Langmuir and Freundlich adsorption models and the adsorption experiments conducted at 30 +/- 1 degrees C showed that the adsorption isotherms correlated well with the Langmuir model. From the adsorption data, thermodynamic parameters such as DeltaG(o), DeltaH(o) and DeltaS(o) were calculated as a function of temperature.
介绍了采用分批技术利用膨胀珍珠岩从水溶液中吸附钍的方法。测定了粒径、溶液pH值、初始钍浓度、振荡时间、V/m比和温度的影响。发现吸附容量随悬浮液pH值的升高而增加。观察到在反应时间的第一小时，钍在膨胀珍珠岩上的吸附速率很快。用朗缪尔和弗伦德利希吸附模型表示吸附等温线，在30±1℃下进行的吸附实验表明，吸附等温线与朗缪尔模型相关性良好。根据吸附数据，计算了作为温度函数的热力学参数，如ΔG(o)、ΔH(o)和ΔS(o)。
