磁性石墨烯对结晶紫的吸附性能研究  

Study on the adsorptive property of magnetic graphene to crystal violet

作　　者：唐然肖[1] 刘伟华[1] 武晓微 高美娜[1] 王春[1] 

机构地区：[1]河北农业大学理学院,河北保定071001

出　　处：《化学研究与应用》2014年第6期827-832,共6页Chemical Research and Application

基　　金：2013年度河北省科技计划项目(项目编号:13211115)

摘　　要：本文研究了磁性石墨烯对结晶紫的吸附特性,考察了pH、吸附剂用量、结晶紫浓度以及温度等对吸附平衡的影响。磁性石墨烯吸附结晶紫符合准二级动力学模型。不同温度下磁性石墨烯对结晶紫的吸附等温线满足Langmuir方程(R2>0.99)、Freundlich方程(R2>0.97)以及D-R模型(R2>0.96)。吸附热力学计算结果表明该吸附过程的△G<0,并且随着温度升高△G越来越小,表明该吸附反应是自发进行的吸热反应。The adsorptive property of crystal violet（ CV） on graphene-based magnetic nanocomposite was studied,the effect of pH, concentration and temperature were analyzed. The resultant kinetic data were well fitted by a pseudo second-order model,the corre-lation coefficient（R2）was 0. 999. The adsorption isotherms for CV follow the Langmiur isotherm mode,Freundlich isotherm mode and D-R isotherm mode with R2 varying from 0. 970 to 0. 985. The Gibbs free energy was less than zero,and the equilibrium adsorp-tion capacity of the magnetic graphene increased with increasing the temperaure from 25℃ to 55℃,so that the adsorption process shoud be spontaneous and endothermic.

关 键 词：磁性石墨烯 吸附 结晶紫 

分 类 号：O658.1[理学—分析化学]