Izvorni znanstveni članak
Separation of Amino Acids from Their Mixture by Facilitated Pertraction with D2EHPA
A.-C. Blaga
; Technical University “Gh. Asachi” of Iasi, Faculty of Chemical Engineering, Dept. of Biochemical Engineering, D. Mangeron 71, 700050 Iasi, Romania
A.-I. Galaction
; University of Medicine and Pharmacy “Gr. T. Popa” of Iasi, Faculty of Medical Bioengineering, Dept. of Biotechnology, University 16, 700115 Iasi, Romania
D. Caşcaval
; Technical University “Gh. Asachi” of Iasi, Faculty of Chemical Engineering, Dept. of Biochemical Engineering, D. Mangeron 71, 700050 Iasi, Romania
Sažetak
The study on facilitated pertraction of some amino acids with D2EHPA as carrier underlined the significant influence of the pH gradient between the aqueous phases, carrier concentration and mixing intensity. The amino acids can be separated selectively by
varying the pH value of feed phase, due to the formation of the corresponding ionic species. The increase of the carrier concentration inside the liquid membrane leads to the intensification
of the initial and final mass flows. The amplitude of this effect depends on the molecular size of the pertracted amino acid. The permeability factors are positively influenced by the increase of the pH value of feed phase and rotation speed of the stirrers
in the aqueous phases, but are negatively affected by the increase of the stripping phase pH. For all studied amino acids, the pertraction system reaches its maximum capacity of solute transfer at γ = 60 g L–1 carrier concentration.
Ključne riječi
Amino acid; D2EHPA; liquid membrane; pertraction; mass flow; permeability factor
Hrčak ID:
30660
URI
Datum izdavanja:
23.12.2008.
Posjeta: 1.000 *