改性膨润土对氟离子吸附的热力学研究  

Adsorption of fluoride ion by modified bentonite with a kinetic study

作　　者：王敏毅[1] WANG Min-yi(Fuzhou Polytechnic, Fuzhou, Fujian 350108, China)

机构地区：[1]福州职业技术学院,福建福州350108

出　　处：《化学工程与装备》2017年第9期16-23,共8页Chemical Engineering & Equipment

摘　　要：本文研究了用10%的硫酸改性前后的膨润土对含氟离子溶液的吸附性能,研究了改性前后膨润土对氟离子吸附的最佳条件,其中包括酸度、浓度、温度、吸附时间以及膨润土的投放量,并在最佳条件下研究膨润土在改性前后的热力学吸附,其等温吸附可用Langmuir、Freundlich模型较好描述,并计算了ΔG、ΔH、ΔS的值。The removal of fluoride ion from artificial wastewater by bentonite and 10% sulfuric-acid modified bentonite are studied in this paper.The feasible conditions was investigated including temperature,pH,concentration,and the amount of bentonite.Research thermodynamic process of adsorption of fluoride ion by the two kinds of bentonite was proposed.The change of the free energy（？G）,the enthalpy（ΔH）,and the entropy（？S） were also evaluated.The isothermal data could be well described by the Freundlich equation.

关 键 词：氟离子 酸改性膨润土 吸附 热力学 

分 类 号：O647.3[理学—物理化学] X703[理学—化学]