Extraction of Polyoxometallate Anions Containing Tungsten Towards Ionic Liquids
| Autor: | Nicolas Papaiconomou, Sylvie Viboud |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
Precipitation (chemistry) Extraction (chemistry) Biophysics Charge density chemistry.chemical_element 02 engineering and technology Tungsten 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Ion chemistry.chemical_compound Tungstate chemistry Ionic liquid Physical chemistry Physical and Theoretical Chemistry 0210 nano-technology Molecular Biology |
| Zdroj: | Journal of Solution Chemistry. 47:1339-1350 |
| ISSN: | 1572-8927 0095-9782 |
| Popis: | Removal of tungstate $$\left( {{{\text{WO}}_{4}^{2-}}} \right)$$ and metatungstate $$\left( {{{\text{W}}_{12} {\text{O}}_{39}^{6 - }} } \right)$$ anions from aqueous solutions was studied by precipitation and liquid–liquid extraction using ionic liquids and without requiring any additional extraction agent. Hydrophilic ionic liquids were found to be very efficient at precipitating metatungstate anion and not to precipitate tungstate anion. Similarly, the large metatungstate anion was quantitatively removed from water at low pH towards a hydrophobic ionic liquid. Tungstate anions, in contrast, are not removed from water. The mechanism of extraction and influence of the charge density of anions on the extraction of W(VI) based anions are discussed. |
| Databáze: | OpenAIRE |
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