Selective Liquid-Liquid Extraction of Mercury(II) from Aqueous Solution by N-Alkyldithiophosphate Compounds CH3(CH2)nS2P(OC6H4)2(n = 0 to 4)
| Autor: | Ma. Elena Páez-Hernández, María Teresa Ramírez Silva, José G. Alvarado-Rodríguez, Francisco Pérez-García, Noemí Andrade-López, Carlos Andrés Galán-Vidal |
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| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Process Chemistry and Technology General Chemical Engineering Inorganic chemistry chemistry.chemical_element Filtration and Separation General Chemistry Mercury (element) chemistry.chemical_compound chemistry Nitric acid Liquid–liquid extraction Selectivity Alkyl Masking agent |
| Zdroj: | Separation Science and Technology. 48:736-740 |
| ISSN: | 1520-5754 0149-6395 |
| Popis: | The extraction of mercury(II) from nitric acid solutions by the dithiophosphate compounds CH3(CH2)nS2P(OC6H4)2 (n = 0 to 4) has been examined. The best extracting properties were displayed by the liquid compound containing the longest alkyl chain CH3(CH2)4S2P(OC6H4)2 (Pen-DTP) in acidic media. The results indicate the stability of Pen-DTPA in nitric and sulphuric media. Pen-DTP selectively extracted Hg(II) in the presence of some interfering ions such as Cd(II), Pb(II) and Bi(III). The Hg(II) recovery from back-extraction experiments with chloridric acid is higher than 70%. Mostly, this extractant shows a remarkable selectivity in the extraction of mercury (76.6%) in the presence of Ag(I) (9.2%) without using a masking agent. |
| Databáze: | OpenAIRE |
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