改性榴莲皮对环丙沙星的吸附性能研究  

Study on Adsorption Performance of Ciprofloxacin by Modified Durian inner shell

作　　者：施伟梅[1] 张超[1] 

机构地区：[1]赣南医学院药学院,江西赣州341000

出　　处：《广州城市职业学院学报》2016年第3期58-63,共6页Journal Of Guangzhou City Polytechnic

基　　金：赣南医学院科研课题(YB201429);赣南医学院本科生创新课题(XS201305)

摘　　要：通过Na OH改性榴莲皮粉末,用SEM及FTIR表征其结构,进而对改性榴莲皮粉末吸附环丙沙星的过程进行动力学与热力学的研究,并采用吸附等温模型对吸附过程进行拟合。结果表明,二级动力学方程能更好地描述改性榴莲皮粉末对环丙沙星的吸附过程(R^2>0.9999,p<0.001),吸附速率常数k_2随着温度的升高而增大,故温度升高有利于吸附的进行;Langmuir模型和Freundlich模型均能很好地描述改性榴莲皮粉末对环丙沙星的吸附过程(R^2>0.90,p<0.05),随着温度的升高,最大吸附量由11.07mg·g^(-1)升高至13.76mg·g^(-1)。热力学研究表明,改性榴莲皮粉末吸附环丙沙星是自发的、吸热的、熵增加的过程。Durian inner shell was chemically modified with NaOH and characterized with scanning electron microscopy（SEM） Fourier infrared spectroscopy（FTIR）. The kinetics and thermodynamics of adsorption of Ciprofloxacin on the Na0H Modified Durian inner shell were studied,and the adsorption process was fitted by adsorption isotherm models. The results indicated that the adsorption of ciprofloxacin by Na0H modified durian inner shell followed the-second-order kinetic model （R^2 〉0.999 9 , 0.001）and the adsorption rate constant k2 increased with increasing temperature, indicating that high temperature favors the adsorption. Both the Langmuir adsorption model and Freundlich model could well describe the adsorption process （R^2〉0.90, p〈0.05）. The maximum adsorption capacity rose from 11.07mg/g to 13.76mg/g with increasing temperature. Thermodynamical study showed that the adsorption process was a spontaneous,endothermic and entropy-increasing process.

关 键 词：榴莲皮 吸附 环丙沙星 动力学 热力学 

分 类 号：X703[环境科学与工程—环境工程]