A Poly(acrylonitrile)-Functionalized Porous Aromatic Framework Synthesized by Atom-Transfer Radical Polymerization for the Extraction of Uranium from Seawater
| Autor: | De-en Jiang, Qing Tang, Carter W. Abney, Yanfeng Yue, Joseph J. Stankovich, Wei Po Liao, Chenxi Zhang, Suree Brown, Chen Liao, Dale K. Hensley, Sheng Dai, Richard T. Mayes, Costas Tsouris, Jihua Chen |
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| Rok vydání: | 2015 |
| Předmět: |
Potassium hydroxide
Sorbent Atom-transfer radical-polymerization General Chemical Engineering Radical polymerization 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Uranyl 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Organic chemistry Seawater Acrylonitrile 0210 nano-technology |
| Zdroj: | Industrial & Engineering Chemistry Research. 55:4125-4129 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | In order to ensure a sustainable reserve of fuel for nuclear power generation, tremendous research efforts have been devoted to developing advanced sorbent materials for extracting uranium from seawater. In this work, a porous aromatic framework (PAF) was surface-functionalized with poly(acrylonitrile) through atom-transfer radical polymerization (ATRP). Batches of this adsorbent were conditioned with potassium hydroxide (KOH) at room temperature or 80 °C prior to contact with a uranium-spiked seawater simulant, with minimal differences in uptake observed as a function of conditioning temperature. A maximum capacity of 4.81 g-U/kg-ads was obtained following 42 days contact with uranium-spiked filtered environmental seawater, which demonstrates a comparable adsorption rate. A kinetic investigation revealed extremely rapid uranyl uptake, with more than 80% saturation reached within 14 days. Relying on the semiordered structure of the PAF adsorbent, density functional theory (DFT) calculations reveal coopera... |
| Databáze: | OpenAIRE |
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