氧化石墨烯-壳聚糖对中性红的吸附动力学及热力学研究  

Adsorption kinetics and thermodynamics of neutral red by graphene oxide-chitosan

作　　者：刘小花[1] 白海鑫[1] LIU Xiaohua;BAI Haixin(College of Sciences,Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]河南农业大学理学院,河南郑州450002

出　　处：《河南农业大学学报》2018年第5期744-748,共5页Journal of Henan Agricultural University

基　　金：国家自然科学青年基金项目(31501213);河南省高等学校青年骨干教师资助计划项目(2014GGJS-083)

摘　　要：研究了氧化石墨烯-壳聚糖(GO-CS)对水溶液中染料中性红的吸附性能。考察了GO-CS用量、吸附时间、温度等因素对中性红吸附效果的影响,探究了其吸附动力学及热力学吸附规律。结果表明,GO-CS对中性红具有显著的去除能力,且符合二级动力学模型。热力学研究表明,GO-CS对中性红的吸附过程符合Langmuir等温吸附方程式,饱和吸附量约为330 mg·g^(-1),该吸附过程为吸热熵增的自发过程。Graphene oxide-chitosan(GO-CS)was employed to be as an adsorbent to remove neutral red in aqueous solution in this research.The influences of the mass of GO-CS,adsorption time,and temperature on the adsorption of neutral red dye were investigated.The laws of adsorption kinetics and thermodynamics were also explored.The results showed that the GO-CS had significant ability to remove neutral red from aqueous solution.The adsorption process was in accordance with the second-order kinetic model.The thermodynamic parameters at different temperatures showed that the adsorption process was in accord with Langmuir isothermal adsorption equation.The maximum adsorption capacity was 330 mg·g-1 and the adsorption process was a spontaneous process with increased of endothermic,entropy.

关 键 词：氧化石墨烯-壳聚糖 中性红 吸附动力学 吸附热力学 

分 类 号：O647.31[理学—物理化学]