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题名: Synergistic nanofibrous adsorbent for uranium extraction from seawater
作者: Zhang, BW; Guo, XJ; Xie, SY; Liu, XY; Ling, CJ; Ma, HJ; Yu, M; Li, JY
刊名: RSC ADVANCES
出版日期: 2016
卷号: 6, 期号:85, 页码:81995-82005
DOI: 10.1039/c6ra18785d
通讯作者: Zhang, BW ; Li, JY (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, CAS Ctr Innovat Adv Nucl Energy, 2019 Jialuo Rd, Shanghai 201800, Peoples R China.
文章类型: 期刊论文
英文摘要: Huge reserves of uranium (U) in seawater have been of interest to scientists and energy companies since the 1950s. However, extracting trace concentrations (3.3 ppb) of U from seawater is economically unfeasible without new, high-performance adsorbents. Here, a mat-like nanofibrous composite adsorbent containing binary coordination groups (amidoxime (AO) and carboxyl (AC(-))) in a highly porous network of nanofibers is constructed via a parallel-blend electrospinning method. Its U uptake in artificial seawater is more than double those of adsorbents containing AO or AC(-) groups alone. Density functional theory (DFT) calculations reveal that this synergistic effect is because the AC(-) group promotes both the U 5f/6d orbital contribution to U-AO bonding and the dissociation of uranyl tricarbonate ions in seawater. In a continuous flow-through experiment with simulated seawater, the nanofibrous adsorbent achieves an adsorption capacity up to 2.86 mg U g(ads)(-1) in 30 d but without saturation, indicating a high efficiency for U extraction.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000382776000072
ISSN号: 2046-2069
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26646
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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