Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 8, Issue 10, Pages 2561-2574Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi00259g
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Funding
- National Natural Science Foundation of China [21902130, 21976147, 11602239]
- Sichuan Science and Technology Program [2019YFN0125, 2019ZDZX0027, 2020YFG0456, 2020YFG0147, 2020YFG0160, 2020YFG0191, 2020YFQ0014, 2020YFS0345, 2019YFG0514, 2019ZDZX0013, 2020JDJQ0060, 2020YFG0467, 2020JDRC0099, 2020ZDZX0012, 2020JDRC0089, 2020JDJQ0009]
- Presidential Funding of CAEP [YZJJLX2019007]
- Career Development Funding of CAEP [2402001]
- SWUST [17zx7135, 18zx7149, 19zx7129]
- Sichuan's Training Program of Innovation and Entrepreneurship for Undergraduate [S201910619101, S202010619038, S202010619056, S202010619057]
- Project of State Key Laboratory of Environment-friendly Energy Materials in SWUST [18fksy0218]
- Sichuan Science and Technology Innovation Seedling Project Cultivation Project [2019072]
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Alumina-doped magnesium oxide aerogels prepared by lyophilization-calcination method exhibited remarkable removal performance for U(vi), especially Al/Mg-3. Al/Mg-3 could quickly reach adsorption equilibrium and have a high adsorption capacity for U(vi). The material showed good reusability and increased adsorption efficiency in continuous separation tests.
Herein, 3D alumina-doped magnesium oxide (Al2O3/MgO) aerogels were successfully prepared by a simple lyophilization-calcination method for the uranium (U(vi)) elimination from wastewater. Various batch experiments were used to testify that Al2O3/MgO aerogels exhibited remarkable removal performance for U(vi), especially Al2O3/MgO aerogels with Al2O3/MgO molar ratios of 1 : 1 (Al/Mg-3). Results showed that Al/Mg-3 could quickly reach the adsorption equilibrium within the contact time of 100 min, while the adsorption capacity of Al/Mg-3 for U(vi) could reach as high as 1046.9 mg g(-1) at pH 6.0. The selectivity of Al/Mg-3 for U(vi) proved that Al/Mg-3 could be used to remove U(vi) from wastewater. The adsorption efficiency of Al/Mg-3 for U(vi) could still retain more than 92.5% after five cycles. Furthermore, the continuous U(vi) separation test results showed that the adsorption equilibrium time and adsorption efficiency of Al/Mg-3 could decrease to 40 min and increase to 99.7%, respectively. This work demonstrated that the remarkable U(vi) removal performance of Al/Mg-3 could make it an effective and reusable material for the adsorption of U(vi) from U(vi)-contained wastewater.
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