Individual and Combined Effects of the Extractant, Surfactant and Modifier Concentrations on the Droplet Coalescence Time of the Primary Emulsion in the Liquid Surfactant Membrane Extraction Process
| Autor: | Leandro Dornellas Sampaio Andrade, Estêvão Magno Rodrigues Araújo, Tânia Lúcia Santos Miranda, Fabrício Eduardo Bortot Coelho, Julio Cézar Balarini, Cibele Konzen, Lorena da Costa Nascimento, Adriane Salum |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Chemistry 030106 microbiology Extraction (chemistry) Solvation 01 natural sciences Diluent 03 medical and health sciences chemistry.chemical_compound Membrane Chemical engineering 1-Decanol Pulmonary surfactant 010608 biotechnology Reagent Emulsion General Earth and Planetary Sciences General Environmental Science |
| Zdroj: | Advances in Chemical Engineering and Science. :205-214 |
| ISSN: | 2160-0406 2160-0392 |
| Popis: | In this work, the individual and combined effects of the extractant, surfactant and modifier concentrations on the droplet coalescence time of the primary emulsion in the liquid surfactant membrane extraction process were evaluated, through emulsification experiments. Adogen 464 was used as extractant (carrier), and Escaid 110, as diluent. Two systems were studied. The first one composed by the extractant, the surfactant and the diluent, and the second one composed by the same reagents, but with the addition of 1-decanol as modifier. It was observed that, when the modifier is not present in the membrane phase, the surfactant not only stabilizes the primary emulsion, but, apparently, it also plays a role similar to that of the alcohol, promoting the solvation of the amine in a low polarity diluent. Furthermore, the extractant, a quaternary amine, helps to stabilize the primary emulsion in systems without a modifier. For membrane phases consisting of 1 or 5% w/w of Adogen 464 and 2% or 5% w/w of ECA 4360, a concentration of 3% w/w of 1-decanol was sufficient to promote the solvation of Adogen 464 in Escaid 110 and to obtain a low droplet coalescence time. |
| Databáze: | OpenAIRE |
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