Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers
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–...
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Elsevier
2024-06-01
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| Series: | Water Science and Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674237023001126 |
| _version_ | 1797232819528794112 |
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| author | Lin Hu Lin Chen Xian-kun Wu Rui Luo Rong-guan Lv Zheng-hao Fei Feng Yang |
| author_facet | Lin Hu Lin Chen Xian-kun Wu Rui Luo Rong-guan Lv Zheng-hao Fei Feng Yang |
| author_sort | Lin Hu |
| collection | DOAJ |
| description | 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 SiO2. As a supporting material, the surface of fibrous SiO2 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/SiO2-AO) through the subsequent amidoximation 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 × 104 mL/g, and a high removal efficiency of 97.59%. The UO22+ adsorption kinetics perfectly conformed to the pseudo-second-order reaction. The sorbent also exhibited an excellent selectivity for UO22+ with other interfering metal ions. |
| first_indexed | 2024-04-24T16:06:20Z |
| format | Article |
| id | doaj.art-60edcd4e8bbd45cfbbcaefe050f1e0a8 |
| institution | Directory Open Access Journal |
| issn | 1674-2370 |
| language | English |
| last_indexed | 2024-04-24T16:06:20Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Science and Engineering |
| spelling | doaj.art-60edcd4e8bbd45cfbbcaefe050f1e0a82024-04-01T04:04:17ZengElsevierWater Science and Engineering1674-23702024-06-01172150156Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibersLin Hu0Lin Chen1Xian-kun Wu2Rui Luo3Rong-guan Lv4Zheng-hao Fei5Feng Yang6School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224051, China; Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource, Yancheng 224051, ChinaSchool of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224051, ChinaSchool of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224051, China; Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource, Yancheng 224051, ChinaSchool of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224051, China; Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource, Yancheng 224051, ChinaSchool of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224051, ChinaSchool of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng 224051, China; Jiangsu Province Engineering Research Center of Agricultural Breeding Pollution Control and Resource, Yancheng 224051, ChinaJiangsu Nanda Huaxing Science and Technology of Environmental Protection Co. Ltd., Yancheng 224001, China; Corresponding author.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 SiO2. As a supporting material, the surface of fibrous SiO2 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/SiO2-AO) through the subsequent amidoximation 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 × 104 mL/g, and a high removal efficiency of 97.59%. The UO22+ adsorption kinetics perfectly conformed to the pseudo-second-order reaction. The sorbent also exhibited an excellent selectivity for UO22+ with other interfering metal ions.http://www.sciencedirect.com/science/article/pii/S1674237023001126Uranium removalSpongeAmidoximationOrganic–inorganic hybrid structureElectrospinning |
| spellingShingle | Lin Hu Lin Chen Xian-kun Wu Rui Luo Rong-guan Lv Zheng-hao Fei Feng Yang Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers Water Science and Engineering Uranium removal Sponge Amidoximation Organic–inorganic hybrid structure Electrospinning |
| title | Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers |
| title_full | Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers |
| title_fullStr | Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers |
| title_full_unstemmed | Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers |
| title_short | Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers |
| title_sort | efficient removal of u vi from wastewater by a sponge like 3d porous architecture with hybrid electrospun nanofibers |
| topic | Uranium removal Sponge Amidoximation Organic–inorganic hybrid structure Electrospinning |
| url | http://www.sciencedirect.com/science/article/pii/S1674237023001126 |
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