类分形修饰法研究活性炭对孔雀石绿的吸附动力学  

Fractal-like Modification Used to Study Kinetics of Malachite Green Adsorption on Activated Carbon

作　　者：韩传喜 高原 徐世艾[1] 冯咏梅[1] 殷国俊 HAN Chuan-xi;GAO Yuan;XU Shi-ai;FENG Yong-mei;YIN Guo-jun(Shandong Provincial Key Lab of Chemical Engineering and Process,Yantai University,Yantai 264009,China;Beijing Center for Physical and Chemical Analysis,Beijing 100089,China)

机构地区：[1]烟台大学化学工程与过程山东省重点实验室,山东烟台264009 [2]北京理化分析测试中心,北京100089

出　　处：《烟台大学学报（自然科学与工程版）》2020年第4期446-450,共5页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：国家自然科学基金资助项目(21606190);烟台大学博士科研启动基金资助项目(HY14B10).

摘　　要：研究了25~45℃下,3种活性炭对孔雀石绿的吸附动力学.与经典准一级和准二级动力学方程相比,类分形修饰后的方程对实验数据的拟合度均得到提高,这说明类分形原理用于分析吸附动力学具有一定的优越性.分形体的维数(d s)与吸附质分子的热运动状态有关,随着吸附温度的升高,d s越大,因此类分形修饰法的重要参数α,随吸附温度升高呈下降趋势.结果表明,类分形修饰准一级动力学模型(FL-PFO)的α符合该规律,并且该模型对所有实验数据的拟合度最高,这说明FL-PFO可能是分析孔雀石绿在活性炭上吸附动力学的一般性方法.The adsorption kinetics of malachite green on three kinds of activated carbons are studied at the temperatures from 25 to 45℃.Compared with the classical pseudo-first and second order kinetics equations,the fractal-like modified equations have higher fitted degree for the experimental data,which indicates that the fractal-like principle has the advantage in the analysis of adsorption kinetics.The fractal dimension is related to the state of adsorbate molecular thermal movement.The d s increases with adsorption temperature increasing.Therefore,the key parameter(α)of fractal-like principle decreases with the increase of adsorption temperature.The pseudo-first order kinetics equation modified by fractal-like principle(FL-PFO)follows the above rule and has a higher fitted degree for the three kinds of activated carbons.It can be concluded that the FL-PFO may have the general application for analyzing the kinetics of malachite green adsorption on activated carbons.

关 键 词：类分形 吸附动力学 孔雀石绿 活性炭 

分 类 号：T07[一般工业技术]