scholarly journals Simultaneous Extraction, Enrichment and Removal of Dyes from Aqueous Solutions Using a Magnetic Aqueous Micellar Two-Phase System

2017 ◽  
Vol 7 (12) ◽  
pp. 1257 ◽  
Author(s):  
Shuanggen Wu ◽  
Danyu Sun ◽  
Chaoyun Wang ◽  
Yuanru Yang ◽  
Fenfang Li ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Phase System ◽  
Two Phase ◽  
Simultaneous Extraction

scholarly journals The extraction of Zn(II) in aqueous PEG (1550)-(NH4)2SO4 two-phase system using Cl- ions as extracting agent

2007 ◽  
Vol 72 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Laura Bulgariu ◽  
Dumitru Bulgariu
Keyword(s):  
Aqueous Solutions ◽  
Extraction Efficiency ◽  
Phase Variation ◽  
Chloride Ions ◽  
Phase System ◽  
Two Phase ◽  
Rich Phase ◽  
Experimental Parameters ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

The extraction of Zn(II) in an aqueous PEG (1550) - (NH4)2SO4 two-phase system as a function of several experimental parameters was studied. PEG-based aqueous two-phase systems are composed of two immiscible phases: a polymer-rich phase and a salt-rich phase, which can be used for extraction experiments. In the absence of a suitable extracting agent, for the system consisting of a mixture of equal volumes of 40 mass% PEG and 40 mass% (NH4)2SO4 aqueous solutions, Zn(II) remained predominantly in the salt-rich phase. Variation of the pH of the salt stock solution did not change very much the extraction efficiency. By adding chloride ions, an enhancement of the Zn(II) extraction was observed. The Zn(II) extraction efficiency in presence of Cl- depends on the acidity of the salt stock solution and on the concentration of chloride ions added into the system.

Extraction and stability of selected proteins in ionic liquid based aqueous two phase systems

2014 ◽  
Vol 16 (5) ◽  
pp. 2670-2679 ◽  
Author(s):  
Rupali K. Desai ◽  
Mathieu Streefland ◽  
Rene H. Wijffels ◽  
Michel H. M. Eppink
Keyword(s):  
Ionic Liquid ◽  
Aqueous Solutions ◽  
Phase System ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
The Stability

This article discusses the extraction of Rubisco in an ionic liquid (IL) based aqueous two phase system and the stability of proteins in aqueous solutions of IL.

scholarly journals EXTRACTION AND ELECTROPHORETIC DETERMINATION OF VANILLIN IN AQUEOUS SOLUTIONS AND ENERGY DRINKS WITH POLYMERS BASED ON N-VINILFORMAMIDE

2017 ◽  
Vol 60 (8) ◽  
pp. 13
Author(s):  
Nadezhda Ya. Mokshina ◽  
Oksana A. Pakhomova ◽  
Gennadiy V. Shatalov ◽  
Maria S. Lavlinskaya
Keyword(s):  
Aqueous Solutions ◽  
Energy Drinks ◽  
Water Soluble ◽  
Phase System ◽  
Two Phase ◽  
Salting Out ◽  
Water Soluble Polymer ◽  
Oh Groups ◽  
Water Salt

The problem of development of new ways of extraction of vanillin from aqueous mediums of various genesis for the analysis and determination of an anolyte under production of foodstuff and energy drinks was actualized. Two-phase water systems on the basis of water-soluble polymers most fully satisfy requirements for extractive systems. Regularities of interphase distribution of vanillin in a water-salt extraction systems on the basis of poly-N-vinylformamide and N-vinilformamide copolymer with N-vinylimidazole are established. The rate of formation of the two-phase system "water-soluble polymer - water-salt solution of vanillin" is significantly influenced by the molecular mass of the extractant: with increasing intrinsic viscosity, the amount of polymer necessary to form a heterogeneous system in the presence of a salting out agent decreases. Influence of ratio of water and organic phases on effectiveness of extraction of vanillin, including in the presence of a caffeine is studied. Effectiveness of use of extraction systems on the basis of the synthesized copolymers for extraction and elektroforetic determination of vanillin and caffeine is established. During the research some conditions of electrophoretic detecting of vanillin and caffeine were optimized: structure of a buffered solution, type and the concentration of a mitsello adjustable influence the dividing ability of a buffered solution. Distribution coefficients and extent of extraction of vanillin are calculated. Schemes of formation of associates in systems vanillin-polymer are offered. The maximal values of extraction characteristics of vanillin in systems with copolymer are lower, than at extraction in systems with poly-N - vinylformamide. It was established that introduction to system of a component with bonds of N-vinylimidazole leads to formation of intramolecular bonds between OH - groups of N-vinylimidazole and "pyridinic" N-atoms of an imidazolny cycle. The way of electrophoretic selection determination of vanillin and caffeine in energy drinks with preliminary extraction of target components with the use of polymers is developed. Forcitation:Mokshina N.Ya., Pakhomova O.A., Shatalov G.V., Lavlinskaya M.S. Extraction and electrophoretic determination of vanillin in aqueous solutions and energy drinks with polymers based on N-vinilformamide. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 8. P. 13-19.

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