甲壳素水热炭对四环素吸附性能的研究  

Adsorption of chitin-based hydrothermal char to tetracycline

作　　者：梁斌 黄祖强[1] 张燕娟[1] 胡华宇[1] LIANG Bin;HUANG Zu-qiang;ZHANG Yan-juan;HU Hua-yu(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《现代化工》2022年第4期104-108,共5页Modern Chemical Industry

基　　金：国家自然科学基金资助项目(22068007,22008041);广西自然科学基金项目(2019GXNSFDA245020,2017GXNSFEA198001);广西大学科研基金资助项目(XJPZ160713)。

摘　　要：为了去除水体中的四环素,合成了甲壳素水热炭吸附剂,并利用SEM、XRD、FT-IR和N_(2)吸附-脱附等温线等对样品进行表征分析;通过批量吸附、定性和定量分析研究了甲壳素水热炭对四环素的吸附性能。结果表明,甲壳素水热炭富含羟基、羰基等活性官能团,存在大量的孔隙结构,比表面积为128.58 m^(2)/g;甲壳素水热炭的吸附过程符合准二级动力学方程和Langmuir模型。热力学分析表明,该过程是自发的吸热反应,最大吸附量为95.60 mg/g,主要吸附机理为化学吸附。In order to remove tetracycline from water,chitin-based hydrothermal char is synthesized as adsorbent.The samples are characterized by XEM,XRD,FT-IR,nitrogen adsorption-desorption isotherms and pore size distributions.Through batch adsorption,qualitative and quantitative analysis,the adsorption characteristics and mechanism of chitin-based hydrothermal char to tetracycline are studied.The results indicate that chitin-based hydrothermal char is rich in active functional groups,such as hydroxyl and carbonyl,and has a lot of pore structures with a specific surface area of 128.58 m^(2)·g^(-1).The adsorption process of chitin-based hydrothermal char to tetracycline accords with the pseudo-second order kinetic equation and Langmuir model.Thermodynamic analysis shows that the process is a spontaneous endothermic reaction.The maximum adsorption capacity of chitin-based hydrothermal char to tetracycline is 95.60 mg·g^(-1),and chemical adsorption dominates the adsorption mechanism.

关 键 词：甲壳素 水热炭 四环素 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]