Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, People's Republic of China.
Environ Sci Pollut Res Int. 2013 Nov;20(11):8202-9. doi: 10.1007/s11356-013-1788-5. Epub 2013 May 29.
In this study, uranium(VI) was successfully removed from aqueous solutions using heat-treated carbon microspheres based on a batch adsorption technique. Influence of the parameters, such as solution pH, contact time, initial uranium(VI) concentration, and temperature on the removal efficiency have been investigated in detail. The results reveal that the maximum adsorption capacity of the heat-treated carbon microspheres toward uranium(VI) is 92.08 mg g(-1), displaying a high efficiency for the removal of uranium(VI) from aqueous solution. The experimental data are analyzed using sorption kinetic models. It is revealed that the process obey the pseudo-second-order kinetic model, the determining step might be chemical sorption. The thermodynamic parameters, such as ΔH°, ΔS°, and ΔG° show that the process is endothermic and spontaneous. This work provides an efficient, fast, and convenient approach for the removal of uranium(VI) from aqueous solutions.
在这项研究中，使用热处理碳微球通过批量吸附技术成功地从水溶液中去除铀(VI)。详细研究了溶液 pH 值、接触时间、初始铀(VI)浓度和温度等参数对去除效率的影响。结果表明，热处理碳微球对铀(VI)的最大吸附容量为 92.08mg/g，显示出从水溶液中去除铀(VI)的高效率。使用吸附动力学模型分析实验数据。结果表明，该过程遵循拟二级动力学模型，决定步骤可能是化学吸附。热力学参数，如ΔH°、ΔS°和ΔG°表明该过程是吸热和自发的。这项工作为从水溶液中去除铀(VI)提供了一种高效、快速和方便的方法。
