新型吸附剂的制备、表征及对罗丹明B的吸附研究  

PREPARATION, CHARACTERIZATION AND ADSORPTION TO RHODAMINE B OF A NOVEL ADSORBING MATERIAL

作　　者：柴红梅[1] 任宜霞[1] 祝磊[1] 张瑞[1] CHAI Hongmei;REN Yixia;ZHU Lei;ZHANG Rui(College o f Chemistry&Chemical Engineering,Yan’an University Shaanxi Key Laboratory of Chemical Reaction Engineering,Yan'an 716000,China)

机构地区：[1]延安大学化学与化工学院陕西省化学反应工程重点实验室

出　　处：《离子交换与吸附》2019年第3期251-259,共9页Ion Exchange and Adsorption

基　　金：陕西省教育厅重点实验室项目(16JS121);陕西省科技厅项目(2017JM2040);大学生创我创业训练计划项目(201510719268);延安大学引导项目(YD2015-08);国家自然科学基金(21573189)

摘　　要：以向日葵秸秆为原料,采用氯化锌活化法制得秸秆活性炭。并对其进行扫描电镜(SEM)和比表面积测定表征分析,考察了活性炭对罗丹明B的最佳吸附条件、吸附热力学和吸附动力学行为。结果表明,向日葵秸秆活性炭对罗丹明B的吸附与Langmuir方程拟合良好,R2>0.99,在323K时最大吸附量可达到666.67mg/g;该吸附过程遵循Lagergren准二级动力学模型。热力学研究表明,该吸附过程为自发进行的吸热过程。A new kind of activated carbon was prepared by ZnCl2 activation using sunflower straw as raw materials.The resulting material was characterized by scanning electron microscopy and specific surface area analysis.Then the activated carbon was used to adsorb Rhodamine B and the optimum condition,adsorption thermodynamic and kinetic characteristics were studied.The results indicated that the adsorption process accorded with Langmuir equation,R2>0.99,the maximum adsorption capacity achieved 666.67 mg/g in 323 K.The adsorption process followed the Pseudo-second-order kinetic model well.The thermodynamics research shown that the adsorption process was a spontaneous,exothermic adsorption process.

关 键 词：罗丹明B 新型吸附剂 吸附热力学 吸附动力学 

分 类 号：X712[环境科学与工程—环境工程]