壳聚糖对蔗糖溶液中单宁酸的吸附性能研究  

Study on Adsorption Properties of Chitosan for Tannic Acid in Sucrose Solution

作　　者：周友全 唐婷范[1,2] 程昊 黄芳丽[1,2] 田玉红 ZHOU You-quan;TANG Ting-fan;CHENG Hao;HUANG Fang-li;TIAN Yu-hong(College of Biological and Chemical Engineering,Guangxi University of Science and Technoloy,Liuzhou 545006,China;Guangxi Key Laboratory of Green Processing of Sugar Resources,Liuzhou 545006,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 [2]广西糖资源绿色加工重点实验室,广西柳州545006

出　　处：《食品工业科技》2020年第3期12-15,21,共5页Science and Technology of Food Industry

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：目的:进行壳聚糖对蔗糖溶液中单宁酸的性能研究。方法:通过吸附动力学和吸附等温线的考察,将吸附动力学实验数据采用粒内扩散模型、准一级动力学模型和准二级动力学模型线性拟合,吸附等温线数据采用Langmuir模型和Freundlich模型线性拟合。结果:在单宁酸的初始浓度为100 mg/L和250 mg/L时,壳聚糖对蔗糖溶液中单宁酸的吸附动力学用准二级动力学模型的拟合效果最好(R^2=0.9993和0.9957);壳聚糖对蔗糖溶液中单宁酸的吸附等温线用Langmuir模型拟合效果最好(R^2=0.9977)。结论:该吸附属于单分子层的化学吸附,理论饱和吸附量为107.53 mg/g。Objective:The effect of chitosan on tannic acid in sucrose solution was studied.Methods:Through the investigation of adsorption kinetics and adsorption isotherm,the experimental data of adsorption kinetics were linearly fitted by intraparticle diffusion model,preudo-first-order kinetics model and preudo-second-order kinetics model,and the adsorption isotherm data were linearly fitted by Langmuir model and Freundlich model.Results:When the initial concentration of tannic acid were 100 mg/L and 250 mg/L,the preudo-second-order kinetics model were better to fit the adsorption kinetics of tannic acid in sucrose solution(R^2 were 0.9993 and 0.9957,respectively),and the Langmuir model was the best to fit the adsorption isotherm of tannic acid in sucrose solution(R^2=0.9977).Conclusion:The adsorption belongs to the chemical adsorption of single molecular layer,and the theoretical saturated adsorption capacity was 107.53 mg/g.

关 键 词：壳聚糖 单宁酸 吸附动力学 吸附等温线 

分 类 号：TS241[轻工技术与工程—制糖工程]