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N₂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 m²/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 m²·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.

梁斌(1996-),女,硕士研究生,主要从事纤维炭材料及废水处理研究,1197453765@qq.com