Metal extraction from solid matrices using a two-surfactant microemulsion in neat supercritical carbon dioxide
| Autor: | Joanna Shaofen Wang, KongHwa Chiu |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Supercritical carbon dioxide
Chemistry Metal ions in aqueous solution Inorganic chemistry Supercritical fluid extraction Analytical Chemistry Metal chemistry.chemical_compound Pulmonary surfactant visual_art Carbon dioxide visual_art.visual_art_medium Microemulsion Leaching (metallurgy) Nuclear chemistry |
| Zdroj: | Microchimica Acta. 167:61-65 |
| ISSN: | 1436-5073 0026-3672 |
| Popis: | Heavy metal ions including Co(II), Cd(II), Cu(II), Pb(II), Zn(II), Eu(III), La(III), and Sr(II) were extracted from solid matrices by using a water-in-CO2 microemulsion composed of sodium bis-(2-ethylhexyl) sulfosuccinate and a nontoxic perfluoropolyether phosphate in neat supercritical carbon dioxide. The extraction efficiency exceeds 90% according to ICP-AES analysis. The method significantly reduces the amount of liquid waste generated since only a small amount of water and no modifier are needed in contrast to the conventional washing or acid leaching processes. |
| Databáze: | OpenAIRE |
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