方沸石/氧化石墨烯复合材料的制备及其对溶液中Cs^(+)的吸附性能试验研究  

Preparation of Analcime/Graphene Oxide Composite and Its Adsorption Properties for Cs^(+)in Aqueous Solution

作　　者：徐琼[1,2] 刘若妍 黄前 邹丽霞[1,2] XU Qiong;LIU Ruoyan;HUANG Qian;ZOU Lixia(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Chemical Biology and Materials Science,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]东华理工大学化学生物与材料科学学院,江西南昌330013

出　　处：《湿法冶金》2021年第5期408-415,共8页Hydrometallurgy of China

基　　金：江西省教育厅科学技术研究项目(209501);东华理工大学研究生创新基金资助项目(DHYC-202024);核资源与环境国家重点实验室开放基金资助项目(2020NRE32)。

摘　　要：研究了以水热法制备方沸石/氧化石墨烯复合材料(GO-ANA),并用以吸附溶液中的Cs^(+),借助SEM&EDS、FT-IR、XRD、BET和TG等表征了GO-ANA的微观形貌、结构、晶相、比表面积和热稳定性,考察了初始Cs^(+)质量浓度、溶液pH、吸附时间、温度对GO-ANA吸附Cs^(+)的影响,确定了吸附机制。结果表明:方沸石(ANA)能够均匀地负载到氧化石墨烯(GO)表面,复合后的GO-ANA具有较好的热稳定性和较大的比表面积;GO-ANA对溶液中的Cs^(+)有较好的吸附性能,在溶液pH=7条件下,吸附160 min反应达到平衡,理论最大吸附量为221.85 mg/g;吸附过程符合准二级动力学模型和Langmuir等温吸附模型;经过5次循环,GO-ANA对Cs^(+)的吸附率从92.73%降至74.29%;GO-ANA可用于从水溶液中吸附去除Cs^(+)。The preparation of analcime/graphene oxide composite(GO-ANA)by hydrothermal method and its adsorption properties for Cs^(+)in aqueous solution were studied.The morphology,structure,crystal phase,specific surface area and thermal stability of GO-ANA were characterized by means of SEM&EDS,FT-IR,XRD,BET and TG.The effects of initial mass concentration,solution pH,adsorption time and temperature on the adsorption of Cs^(+)by GO-ANA were investigated,and the adsorption mechanism was determined.The results show that the analcime(ANA)can be uniformly loaded onto the GO surface,and the composite GO-ANA has good thermal stability and large specific surface area.Go-ANA has a good adsorption capacity for Cs^(+)in the solution.The maximum theoretical adsorption capacity is 221.85 mg/g under the conditions of pH of 7 and the reaction reaches equilibrium for 160 min.The adsorption process conforms to the quasi-second-order kinetic model and Langmuir isothermal model.After 5 cycles,the adsorption rate of Cs^(+)by GO-ANA decreased from 92.73%to 74.29%.GO-ANA can be used to adsorb and remove Cs^(+)from aqueous solutions.

关 键 词：方沸石(ANA) 氧化石墨烯(GO) 复合材料 吸附 铯 

分 类 号：TQ424[化学工程] TF826.5[冶金工程—有色金属冶金]