Adsorption of U(VI) on sulfonated ordered mesoporous polymer
- PDF / 3,196,117 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 43 Downloads / 186 Views
Adsorption of U(VI) on sulfonated ordered mesoporous polymer Youqun Wang1,2,3 · Wenzheng Cui1,3 · Huan Wang1,3 · Yinghui Xie1,2 · Zhibin Zhang1,2 · Xiaohong Cao1,2 · Yunhai Liu1,2 Received: 15 April 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract Fudan University (FDU)-type mesoporous polymer (FDU-15) was sulfonated by fuming sulfuric acid. The application of FDU-15 and sulfonated FDU-15 (FDU-15-SO3H/t, t = 9 h, 18 h, or 27 h) in removing of U(VI) was explored comprehensively. The adsorbents were characterized by various techniques. The effects of sulfonation time, initial pH values, shaking time, initial concentrations, and temperature on adsorption were optimized. Besides, the desorption and reusability, as well as adsorptive selectivity were investigated. The results indicated high adsorption (43.65 ± 2.11 mg g−1) was achieved under weak acid condition (pH 2.0) for FDU-15-SO3H/9 h. In short, FDU-15-SO3H/9 h may be a superior adsorbent to remove the U(VI) in wastewater. Keywords Mesoporous polymer · Adsorption · Uranium · Sulfonation
Introduction Uranium is a raw material [1] to manufacture of nuclear fuel elements. Therefore, it is particularly crucial for the development of the atomic energy [2]. However, a huge amount of uranium-containing contaminants have been generated during mining, conversion, and other activities. Thus, the removal of uranium (mainly in the form of U(VI)) in aqueous media has attracted increasing concerns for its the chemical and radioactive toxicity [2]. Methods for removing U(VI) from radioactive wastewater include chemical precipitation, solvent extraction, and adsorption. Adsorption has been considered to be one of Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10967-020-07322-2) contains supplementary material, which is available to authorized users. * Zhibin Zhang [email protected] 1
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, People’s Republic of China
2
Key Laboratory of Radioactive Geology and Exploration Technology Fundamental Science for National Defense, East China University of Technology, Nanchang 330013, People’s Republic of China
3
School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, People’s Republic of China
the most promising techniques for its high efficiency [3] and practicality. Until now, various adsorbents have been developed, including the activated carbon [4], polymers [5], and hematite [6] and so on. An effective adsorbent should have a stable and insoluble porous matrix, and suitable reactive groups that can interact with the U(VI) [7]. With narrow pore-size distributions (PSD), the large specific surface area, and open-pore structures, the mesoporous materials have immense potential in adsorption [8]. Recently, a feasible and straightforward way of evaporation-induced self-assembly (EISA) [9] has been applied to prepare the mesoporous materials such as FDU-15 and FDU-16.
Data Loading...
