Highly efficient removal of uranium from highly acidic media achieved using a phosphine oxide and amino functionalized superparamagnetic composite polymer adsorbent
| Autor: | Shiao Zhang, Bibo Chen, Yun Wang, Yan Liu, Dingzhong Yuan, Qinghua Zhang, Jizhou Zhao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Phosphine oxide
Renewable Energy Sustainability and the Environment Extraction (chemistry) Langmuir adsorption model chemistry.chemical_element 02 engineering and technology General Chemistry Uranium 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences symbols.namesake chemistry.chemical_compound Adsorption chemistry Polymerization symbols General Materials Science 0210 nano-technology Selectivity Nuclear chemistry Superparamagnetism |
| Zdroj: | Journal of Materials Chemistry A. 8:10925-10934 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/d0ta01633k |
| Popis: | It is very important to develop magnetic adsorbents for the efficient extraction of uranium from highly acidic media. In this work, a novel magnetic adsorbent Fe3O4/P(DMAA–DMP) functionalized with phosphine oxide and amino groups has been synthesized by distillation–precipitation polymerization of diallylamine (DMAA) and di(methacryloxyethyl)phosphate (DMP). Surprisingly, Fe3O4/P(DMAA–DMP) not only showed an outstanding adsorption efficiency for uranium in highly acidic solution, but also had excellent acid resistance. The maximum adsorption capacity (qmax) of the magnetic adsorbent based on the Langmuir model could reach 196.4 mg g−1 even at a pH value of 0.5, which was much higher than that of all the magnetic adsorbents reported previously. And the structure and properties of the adsorbent did not change obviously after being immersed in HNO3 solution at a pH value of 0.5 for 24 h. Besides, the magnetic adsorbent also had a good selectivity for uranium and an excellent recyclability. XPS analysis confirmed that the outstanding adsorption capacity of the magnetic adsorbent for uranium was attributed to the strong complexation with phosphine oxide and amino groups. This work displays a simple route for developing a magnetic adsorbent for the highly efficient adsorption of uranium in highly acidic media, which is very significant for the recovery of uranium from highly acidic solution. |
| Databáze: | OpenAIRE |
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