壳聚糖对天冬酰胺的吸附性能研究  

Study on Adsorption Behaviors of Asparagine by Chitosan

作　　者：邓起东 唐婷范[1] 田玉红[1] 周友全 DENG Qidong;TANG Tingfan;TIAN Yuhong;ZHOU You-quan(College of Biological and Chemical Engineering,Guangxi University of Science and Technoloy,Liuzhou545006,Guangxi,China)

机构地区：[1]广西科技大学生物与化学工程学院,广西柳州545006

出　　处：《食品研究与开发》2019年第1期46-50,共5页Food Research and Development

基　　金：国家自然科学基金委员会资助项目地区科学基金项目(21662003);广西自然科学基金项目青年基金项目(2016GXNSFBA380073);广西壮族自治区中青年教师基础能力提升项目(KY2016YB250);广西高校糖资源加工重点实验室开放课题项目(2015TZYKF01);广西科技大学博士基金项目(校科博14Z06);广西科技大学"大学生创新创业训练计划"项目(201810594044)

摘　　要：采用壳聚糖对水溶液中天冬酰胺的吸附性能进行初步研究。采用粒内扩散模型、准一级动力学模型和准二级动力学模型对壳聚糖吸附天冬酰胺的动力学数据进行拟合,并采用Langmuir等温方程和Freundlich等温方程对其吸附等温线数据进行结果拟合。试验表明,当天冬酰胺的初始浓度分别为50、100、150 mg/L时,壳聚糖对天冬酰胺的吸附过程均符合准二级动力学方程(R^2=0.985 7～0.993 2)。壳聚糖对天冬酰胺的吸附等温线符合Langmuir等温吸附模型(R^2=0.978 8),其饱和吸附量为87.72 mg/g。壳聚糖对天冬酰胺具有一定的吸附能力。The adsorption behaviors of asparagine by chitosan in aqueous solutions were studied.The kinetic data of the adsorption of asparagine by chitosan were fitted with the intragranular diffusion model,pseudo-firstorder kinetic model and pseudo-second-order kinetic mode.The adsorption isotherm data were attempted to be fitted with the Langmuir and Freundlich adsorption modes.The results showed that the adsorption of asparagine by chitosan agreed with the pseudo-second-order kinetic behavior(R2=0.985 7-0.993 2)under the condition of the initial asparagine concentration of 50,100,150 mg/L.Additionally,the adsorption isotherms of asparagine by chitosan were consistent with the Langmuir model(R2=0.978 8),and the saturated adsorption capacity reached 87.72 mg/g.The adsorption capacity of chitosan for asparagine was at a medium level according to relative literatures.

关 键 词：壳聚糖 天冬酰胺 吸附动力学 吸附等温线 

分 类 号：TS244[轻工技术与工程—制糖工程]