柠檬酸接枝苎麻纤维铀吸附及抗菌性能  

Uranium Adsorption and Antibacterial Properties of Ramie Fibers Grafted with Citric Acid

作　　者：陈茜茜 邹淑芬[1,2] 张爽 那兵 柳和生[2,4] Qianqian Chen;Shufen Zou;Shuang Zhang;Bing Na;Hesheng Liu(School of Chemistry,Biology and Materials Science,East China University of Technology,Nanchang 330013,China;Key Laboratory of Polymer Micro and Nano Manufacturing and Devices,Nanchang 330013,China;State Key Laboratory of Nuclear Resources and Environment,Nanchang 330013,China;School of Mechatronics and Vehicle Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]东华理工大学化学生物与材料科学学院,江西南昌330013 [2]江西省聚合物微纳制造与器件重点实验室,江西南昌330013 [3]核资源与环境国家重点实验室,江西南昌330013 [4]华东交通大学机电与车辆工程学院,江西南昌330013

出　　处：《高分子材料科学与工程》2023年第4期78-84,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21965001);核资源与环境国家重点实验室项目(2020Z05);江西省主要学科学术和技术带头人项目(20194BCJ22011)。

摘　　要：核能开发会产生大量含铀废水,危害生态环境和人类健康。文中通过酯化法制备了柠檬酸接枝苎麻纤维吸附剂,用于去除水溶液中的铀。研究了铀酰离子初始浓度、溶液pH值、吸附时间、温度等条件对吸附剂性能的影响。结果表明,当铀酰离子初始浓度为20mg/L、溶液pH=6、吸附剂的投加量为0.02g/L、吸附时间为12h时达到吸附平衡,最大吸附容量为397mg-U/g;吸附过程符合Langmuir模型和准二级动力学模型。另外,吸附剂对大肠杆菌具有明显的抑制作用,表现出良好的抗菌性能。The development of nuclear energy produces a large amount of uranium-containing wastewater,which endangers the ecological environment and human health.In this paper,a citric acid grafted ramie fiber adsorbent was prepared by esterification for uranium removal from aqueous solution.The effects of initial concentration,solution pH value,contact time and temperature on uranium uptake of the adsorbent were studied.The results show that the maximum adsorption capacity is 397 mg-U/g at the initial uranium concentration of 20 mg/L,pH=6 and the adsorbent loading of 0.02 g/L.Moreover,the uranium adsorption process conforms to Langmuir model and pseudo-second-order kinetic model,respectively.In addition,the adsorbent has obvious inhibitory effect on E.coli and shows good antibacterial properties.

关 键 词：苎麻纤维 柠檬酸 吸附 铀 抗菌 

分 类 号：X771[环境科学与工程—环境工程]