Study of the influence of solute and carrier characteristics on facilitated pertraction mechanism in pseudosteady-state conditions

Caşcaval, Dan; Galaction, Anca‐Irina; Turnea, Marius

doi:10.1016/j.memsci.2008.12.011

Cited by 12 publications

(6 citation statements)

References 25 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, the strongly acidic domain also induces the protonation of the extractant, which hinders its reaction with rosmarinic acid. 29 In this case, because of these contrary effects of pH, the maximum extraction efficiency is reached for pH 3 ( Figure 2b). The maximum extraction degree of rosmarinic acid with D2EHPA is less evident than that with Amberlite LA-2, because, in the strongly acidic domain, the carboxylic group is not ionized, which allows for possible physical coextraction with a positive effect on solute transfer into the organic phase.…”

Section: Resultsmentioning

confidence: 85%

“…Reactive extraction with D2EHPA occurs if the phenolic groups of rosmarinic acid exist in the protonated form in the aqueous phase and thus in the highly acidic domain. However, the strongly acidic domain also induces the protonation of the extractant, which hinders its reaction with rosmarinic acid . In this case, because of these contrary effects of pH, the maximum extraction efficiency is reached for pH 3 (Figure b).…”

Section: Resultsmentioning

confidence: 97%

See 1 more Smart Citation

Comparative Study on Rosmarinic Acid Separation by Reactive Extraction with Amberlite LA-2 and D2EHPA. 1. Interfacial Reaction Mechanism and Influencing Factors

Kloetzer

Poștaru

Galaction

et al. 2013

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The mechanism of reactive extraction of rosmarinic acid with Amberlite LA-2 (secondary amine) and D2EHPA (organophosphoric acid) was analyzed for three solvents with different polarities (n-heptane, n-butyl acetate, dichloromethane), with or without 1-octanol. Thus, in the absence of 1-octanol, the stoichiometric ratio between the rosmarinic acid and Amberlite LA-2 was 1:1 for dichloromethane, 1:2 for butyl acetate, and 1:4 for n-heptane. In the presence of 1-octanol, the formation of aminic adducts is restricted, and the structures of the interfacial complexes reflect the following stoichiometries for the interfacial reaction between the solute and Amberlite LA-2: 1:1 for dichloromethane and butyl acetate and 1:2 for n-heptane. However, regardless of 1-octanol addition to the organic phase, the extraction of rosmarinic acid with D2EHPA occurred only through the formation of an interfacial compound containing one acid molecule and two molecules of extractant for all considered solvents. In the case of reactive extraction with Amberlite LA-2, the highest extraction constant was reached for low-polarity solvents, which promotes the formation of aminic adducts. In contrast, an increase of the organic-phase polarity positively influenced the value of the extraction constant for extraction with D2EHPA.

show abstract

Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 97%

Comparative Study on Rosmarinic Acid Separation by Reactive Extraction with Amberlite LA-2 and D2EHPA. 1. Interfacial Reaction Mechanism and Influencing Factors

Kloetzer

Poștaru

Galaction

et al. 2013

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The experiments have been carried out using the pertraction equipment described in the previous papers (Fig. 1 ) 13 . The pertraction cell was designed and operated for obtaining and maintaining the solvent layer between the two aqueous phases without needing surfactants, only on the basis of the densities difference between the three phases.…”

Section: Methodsmentioning

confidence: 99%

Selective pertraction of dicarboxylic acids from simulated Rhizopus oryzae fermentation broths

Kloetzer

Blaga

Caşcaval

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Fumaric, malic and succinic acids have been selectively separated by facilitated pertraction with Amberlite LA-2, using n-heptane as liquid membrane. The feed phase consisted on viscous aqueous solution with similar mixture of carboxylic acids and viscosity as those of Rhizopus oryzae fermentation broth. Due to the differences between the acidities and molecule size of these acids, it is possible to selectively recover fumaric acid from the initial solution. The pH-gradient between the feed and stripping phases, as well as carrier concentration in the liquid membrane represent the main process parameters influencing the pertraction selectivity. Among them, Amberlite LA-2 concentration exhibits the most important control on the selectivity factor S, the maximum value of S being reached for carrier concentration of 30 g/l. The increase of feed phase viscosity amplified the magnitude of these influences on pertraction selectivity, due to the hindrance of acids diffusion towards the region where their reaction with Amberlite LA-2 occurs, effect more important for malic acid. Therefore, by modifying the viscosity from 1 to 24 cP, the maximum value of selectivity factor was increased from 12 to 18.8.

show abstract

“…At the interface membrane | stripping phase takes place the decomplexation, the regeneration of the carrier and the accumulation of the solute in the stripping phase as an inactive for transport compound (figure 2.c). For example the transport of Hg 2+ through a BLM containing calix [4] arene thioalkyl derivative as a carrier (Minhas et al 2010) in parallel with the facilitated transport the simple transport can take place also (Caşcaval et al, 2009).…”

Section: Transport Mechanisms For Bulk Liquid Membranesmentioning

confidence: 99%

Analytical Applications of Transport Through Bulk Liquid Membranes

Diaconu

Ruse

Aboul‐Enein

et al. 2015

Critical Reviews in Analytical Chemistry

View full text Add to dashboard Cite

This review discusses the results of research in the use of bulk liquid membranes in separation processes and preconcentration for analytical purposes. It includes some theoretical aspects, definitions, types of liquid membranes, and transport mechanism, as well as advantages of using liquid membranes in laboratory studies. These concepts are necessary to understand fundamental principles of liquid membrane transport. Due to the multiple advantages of liquid membranes several studies present analytical applications of the transport through liquid membranes in separation or preconcentration processes of metallic cations and some organic compounds, such as phenol and phenolic derivatives, organic acids, amino acids, carbohydrates, and drugs. This review presents coupled techniques such as separation through the liquid membrane coupled with flow injection analysis.

show abstract

Study of the influence of solute and carrier characteristics on facilitated pertraction mechanism in pseudosteady-state conditions

Cited by 12 publications

References 25 publications

Comparative Study on Rosmarinic Acid Separation by Reactive Extraction with Amberlite LA-2 and D2EHPA. 1. Interfacial Reaction Mechanism and Influencing Factors

Comparative Study on Rosmarinic Acid Separation by Reactive Extraction with Amberlite LA-2 and D2EHPA. 1. Interfacial Reaction Mechanism and Influencing Factors

Selective pertraction of dicarboxylic acids from simulated Rhizopus oryzae fermentation broths

Analytical Applications of Transport Through Bulk Liquid Membranes

Contact Info

Product

Resources

About