期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 768, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.144212
关键词
Solution-freeze-drying-calcination; Low density; Metal oxide aerogel; Uranium; Adsorption
资金
- National Natural Science Foundation of China [21902130, 21976147, 11602239]
- Sichuan Science and Technology Program [2020JDJQ0009]
- CAEP [YZJJLX2019007]
- Career Development Funding of CAEP [2402001]
- Research Fund for the Doctoral Program of Southwest University of Science and Technology [17zx7135]
- Sichuan's Training Program of Innovation and Entrepreneurship for Undergraduate [S202010619057]
- Sichuan Science and Technology Innovation Seedling Project Cultivation Project [2019072]
Low density CeO2, Pr2O3 and Nd2O3 aerogels were synthesized through a novel method and exhibited excellent adsorption performance for U(VI) removal, with high reusability even after multiple cycles.
The low density CeO2, Pr2O3 and Nd2O3 aerogels were synthesized by a novel solution-freeze-drying-calcination route. The bulk densities of the CeO2, Pr2O3 and Nd2O3 aerogels were calculated to be 8.10, 10.67 and 9.80 mg/cm(3), respectively. Moreover, the structure of metal oxide aerogels was similar due to the same template materials, which made them possible to be appealing materials for adsorption. The maximum adsorption capacity for U(VI) of the CeO2, Pr2O3 and Nd2O3 aerogels reached 481.5, 840.6 and 587.3 mg/g (pH = 7, T = 25 degrees C), respectively, which were much higher than most of other modified metal oxides. Moreover, at low concentration of U(VI) (5 mg/L), it was completely dislodged by CeO2 aerogel and the remaining U(VI) was below 0.006 mg/L, which was lower than the effluent standards of United States Environmental Protection Agency and World Health Organization. Besides, after five cycles, the adsorption efficiency of metal oxide aerogels almost remained at a high level. Due to the excellent adsorption performance and high reusability, the three metal oxide aerogels would be promising adsorbents for the removal of U(VI). (C) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据