Amino modified nanofibers anchored to Prussian blue nanoparticles selectively remove Cs^(+)from water  

作　　者：Shanshan Feng Jingshuai Gao Shouzhu Li Xun Cao Jie Ni Xiuli Yue Wei Zheng Yuyao Li Xueqi Hu Yao Zhang Sheng Feng 

机构地区：[1]School of Environmental and Safety Engineering,Changzhou University,Changzhou 213164,China [2]Jiangsu Petrochemical Safety and Environmental Protection Engineering Research Center,Changzhou 213164,China [3]Laboratory of Nanofiber Membrane Materials and Devices,Xinjiang Institute of Technology,Xinjiang 843100,China [4]State Key Laboratory of Urban Water Resources and Environment,School of Environmental Engineering,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Environmental Sciences》2024年第12期39-54,共16页环境科学学报（英文版）

基　　金：supported by the College Students Extracur-ricular Innovation and Entrepreneurship Fund Project of Changzhou University(No.ZMF21020079);the Natural Sci-ence Fund for Colleges and Universities in Jiangsu Province(No.18KJB610001);the Natural Science Foundation of Jiangsu Province(No.BK20180964);the Science and Technology Project of Changzhou City(No.CJ20210119);the Natural Science Foun-dation of China(No.22075032);the National Key Research and Development Program(No.2021YFC3001104);the Natural Sci-ence Foundation of Xinjiang Uygur Autonomous Region(Nos.2020D01A49,2020D01B25 and 2020D01B26).

摘　　要：To improve the selective separation performance of silica nanofibers(SiO_(2)NFs)for cesium ions(Cs+)and overcome the defects of Prussian blue nanoparticles(PB NPs),PB/SiO_(2)-NH_(2)NFs were prepared to remove Cs^(+)from water.Among them,3-aminopropyltriethoxysilane(APTES)underwent an alkylation reaction with SiO_(2),resulting in the formation of a dense Si-O-Si network structure that decorated the surface of SiO_(2)NFs.Meanwhile,the amino functional groups in APTES combined with Fe3+and then reacted with Fe2+to form PB NPs,which anchored firmly on the aminoated SiO_(2)NFs surface.In our experiment,the maxi-mumadsorption capacity of PB/SiO_(2)-NH_(2)NFs was 111.38 mg/g,which was 31.5mg/g higher than that of SiO_(2)NFs.At the same time,after the fifth cycle,the removal rate of Cs^(+)by PB/SiO_(2)-NH_(2)NFs adsorbent was 75.36%±3.69%.In addition,the adsorption isotherms and adsorption kinetics of PB/SiO_(2)-NH_(2)NFs were combined with the Freundlich model and the quasi-two-stage fitting model,respectively.Further mechanism analysis showed that the bond between PB/SiO_(2)-NH_(2)NFs and Cs^(+)was mainly a synergistic action of ion exchange,electrostatic adsorption and membrane separation.

关 键 词：Electrostatic spinning NANOFIBERS Separation Prussian blue RADIONUCLIDE 

分 类 号：X703[环境科学与工程—环境工程] TB383.1[一般工业技术—材料科学与工程]