磁性碳纳米管对水中孔雀绿的吸附性能研究  

Study on the Adsorptive Property of Magnetic Carbon Nanotubes for Malachite Green from Aqueous Solution

作　　者：赵影[1] 唐然肖[1] 王彤[1] 宋双居[1] 

机构地区：[1]河北农业大学理学院,保定071001

出　　处：《化学通报》2015年第12期1154-1157,共4页Chemistry

基　　金：2013年度河北省科技计划项目(13211115);河北省大学生创新训练项目(201410086008);河北农业大学创新训练项目(cxzr2014025);2015年度河北农业大学理工基金项目(LG20150402)资助

摘　　要：以磁性碳纳米管吸附处理孔雀绿溶液,考察了吸附剂用量、孔雀绿浓度以及温度等对吸附平衡的影响。结果表明,该吸附不受溶液p H的影响,符合准二级动力学方程(R2>0.999)。不同温度下,该吸附过程满足Langmuir方程(R2>0.97)和Freundlich方程(R2>0.98),qmax、KF随温度升高而变大。D-R等温方程拟合结果表明该吸附的机理是以化学吸附为主。热力学参数计算结果表明,该吸附是一个熵增的自发吸热过程,温度越高越利于吸附的进行。The adsorptive property of magnetic carbon nanotubes（ CNTs） for malachite green（ MG） and the effects of adsorbent dosage,p H,concentration of the solution and temperature on adsorption were studied. The resultant kinetic data were well fitted by a pseudo second-order model（ R2 0. 999）. At the different temperature,the adsorption process was in accordance with the Langmuir isotherm mode（ R2 0. 97） and the Freundlich isotherm mode（ R2 0. 98）. The result of D-R isotherm mode implied that the adsorption mechanism for MG was mainly a chemical adsorption. The thermodynamics study indicated that the adsorption of MG on the magnetic CNTs was spontaneous and exothermic,and the adsorption process became more favorable at higher temperature.

关 键 词：磁性碳纳米管 吸附 孔雀绿 动力学 热力学 

分 类 号：X791[环境科学与工程—环境工程]