摘要
蒙脱石吸附铀实验研究表明，溶液pH值为5．0～6．0时，蒙脱石对铀的吸附率最大，为55．70％～59．81％；吸附等温线符合Langmuir和Freundlich模型，但Freundlich模型更好，相关系数达0．9983；铀吸附动力学可用二级速率方程描述，相关系数达0．9199～0．9876；钾、钠释放可用一级反应动力学方程描述，相关系数在0．8782—0．9929之间；蒙脱石吸附铀主要是表面吸附．
The test of the 55.70 % - 59.81% adsorption 6.0 of the solution ; the adsorpti adsorption for uranium of the montmorillonite has been finished, the results show that the efficiency for the uranium of montmorillonite has been attained in the case of pH5.0 on pattern of uranium on montmorillonite iss consistent with Langmuir and Freundlich isotherm, but Freundlich isotherm is better, and 0. 998 3 of correlation coefficient is attained ; the pseudo second-order model and the pseudo first-order model describe the rection rate of Uranium and the released rection of Potassium and Sodium ions respectively,0.919 9 - 0.987 6 and 0.878 2 - 0.992 9 of its correlation coefficient is gained respectively. The adsorption for uranium remains with surface adsorption.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2007年第3期75-79,共5页
Journal of Natural Science of Hunan Normal University
基金
湖南省自然科学基金资助项目(05jj30094)
关键词
蒙脱石
铀
吸附
动力学
热力学
montmorillonite
uranium
adsorption
thermodynamics
kinetics
