Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers  

作　　者：Lin Hu Lin Chen Xian-kun Wu Rui Luo Rong-guan Lv Zheng-hao Fei Feng Yang 

机构地区：[1]School of Chemistry and Environmental Engineering,Yancheng Teachers University,Yancheng 224051,China [2]Jiangsu Province Engineering Research Center of Agriculural Breeding Pollution Control and Resource,Yancheng 224051,China [3]Jiangsu Nanda Huaxing Science and Technology of Environmental Protection Co.Ltd.,Yancheng 224001,China

出　　处：《Water Science and Engineering》2024年第2期150-156,共7页水科学与水工程（英文版）

基　　金：supported by the Opening Project of the Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource(Grant No.2021ABPCR010);the Natural Science Research Project of Jiangsu Higher Education Institutions of China(Grants No.20KJB150035,21KJD610004,and 21KJA530004).

摘　　要：Removal of uranium(VI)from nuclear wastewater is urgent due to the global nuclear energy exploitation.This study synthesized novel sponge-like 3D porous materials for enhanced uranium adsorption by combining electrospinning and fibrous freeze-shaping techniques.The materials possessed an organic-inorganic hybrid architecture based on the electrospun fibers of polyacrylonitrile(PAN)and SiO_(2).As a sup-porting material,the surface of fibrous SiO_(2) could be further functionalized by cyano groups via(3-cyanopropyl)triethoxysilane.All the cyano groups were turned into amidoxime(AO)groups to obtain a amidoxime-functionalized sponge(PAO/SiO_(2)-AO)through the subsequent ami-doximation process.The proposed sponge exhibited enhanced uranium adsorption performance with a high removal capacity of 367.12 mg/g,a large adsorption coefficient of 4.0×10^(4)mL/g,and a high removal efficiency of 97.59%.The UO_(2)^(2+)adsorption kinetics perfectly conformed to the pseudo-second-order reaction.The sorbent also exhibited an excellent selectivity for UO_(2)^(2+) with other interfering metal ions.2023 Hohai University.Production and hosting by Elsevier B.V.

关 键 词：Uranium removal SPONGE Amidoximation Organic-inorganic hybrid structure ELECTROSPINNING 

分 类 号：X52[环境科学与工程—环境工程]