Separation of nitrophenols. Equilibriums in bi- and tri-phasic systems
2010; Elsevier BV; Volume: 4; Issue: 1 Linguagem: Inglês
10.1016/j.arabjc.2010.06.025
ISSN1878-5379
AutoresIoana Diaconu, Hassan Y. Aboul‐Enein, Mohamed A. Al‐Omar, Gheorghe Nechifor, Elena Ruse, Andrei A. Bunaciu, Eugenia Eftimie Totu,
Tópico(s)Analytical Chemistry and Chromatography
ResumoThe paper presents experimental data obtained in the study of liquid–liquid partition equilibriums in biphasic system in order to optimize the process of transport through bulk liquid membranes (triphasic partition systems). The partition equilibriums of some nitrophenols using chloroform as extraction solvent and membranary solvent, respectively, were studied. The influence of the pH on the partition equilibriums was investigated. The repartition constants and the pKa values of the studied nitrophenols were calculated. Nitrophenols were transferred in triphasic system from a feed phase with pH 2, through a chloroform liquid membrane, into a receiving phase with pH 12, with efficiencies over 90%.
Referência(s)