磁性介孔碳吸附模拟废水中的结晶紫  

Adsorption of magnetic mesoporous carbon for crystal violet from model wastewater

作　　者：高美娜[1] 唐然肖[1] 翟焱洲 刘伟华[1] 王春[1] 

机构地区：[1]河北农业大学理学院,保定071001

出　　处：《环境工程学报》2015年第10期4883-4889,共7页Chinese Journal of Environmental Engineering

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)

摘　　要：以磁性介孔碳吸附处理结晶紫染料模拟废水,考察了吸附剂投加量、溶液p H、结晶紫初始浓度以及温度对吸附平衡的影响。结果表明,该吸附不受溶液p H的影响,符合拟二级动力学方程(R2>0.996)。在不同温度下,吸附过程更符合Langmuir等温方程(R2>0.997),在45℃时其最大吸附量是151.52 mg/g。该吸附的活化能Ea介于21.93和24.17k J/mol之间,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,提高温度有利于吸附的进行。The adsorption property of magnetic mesoporous carbon for crystal violet was studied. The effects of adsorbent dosage,the p H,concentration and temperature of the solution on the adsorption efficiency were investigated. The resultant kinetic data was well fitted by the pseudo-second-order kinetics model. At different temperatures,the adsorption process was in accordance with the Langmiur isotherm mode（ R2 0. 997）,and the maximum adsorption capacity was 151. 52 mg / g at 45℃. The activation energy（ Ea） of the system was between21. 93 and 24. 17 k J / mol,which implied that the adsorption mechanism for crystal violet was mainly a chemical adsorption. The thermodynamics study（ △G 0,△H 0,△S 0） indicated that the adsorption of crystal violet on the magnetic mesoporous carbon was spontaneous and exothermic,and the adsorption process became more favorable at higher temperuatures.

关 键 词：磁性介孔碳 结晶紫 吸附 动力学 热力学 

分 类 号：O658.1[理学—分析化学]