CAJ | 학술논문

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。
본문연구료자성석묵희대결정자적흡부특성,고찰료pH、흡부제용량、결정자농도이급온도등대흡부평형적영향。자성석묵희흡부결정자부합준이급동역학모형。불동온도하자성석묵희대결정자적흡부등온선만족Langmuir방정(R2>0．99)、Freundlich방정(R2>0．97)이급D-R모형(R2>0．96)。흡부열역학계산결과표명해흡부과정적△G<0,병차수착온도승고△G월래월소,표명해흡부반응시자발진행적흡열반응。
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.