Evaluation of Kinetic Parameters at the Transport of Indole-3-acetic Acid Through Bulk Liquid Membranes

2017 ◽  
Vol 68 (5) ◽  
pp. 903-907
Author(s):  
Ecaterina Anca Serban ◽  
Ioana Diaconu ◽  
Elena Ruse ◽  
Georgiana Ileana Badea ◽  
Adriana Cuciureanu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Kinetic Parameters ◽  
Trioctylphosphine Oxide ◽  
Bulk Liquid ◽  
Transport Parameters ◽  
Kinetics Parameters ◽  
First Order ◽  
Phase Concentration ◽  
Feed Phase ◽  
Indole 3 Acetic Acid

Indole-3-acetic acid is a growth phytohormone considered the most important representative of auxin class. This paper presents the assessment of some kinetic parameters in the process of transport of indole-3-acetic acid taking into consideration the kinetic model of consecutive irreversible first order reactions. It was pursued the influence upon the process of parameters such as: feed phase concentration, stripping phase concentration in the presence of two type carriers: tributyl phosphate (TBP) and trioctylphosphine oxide (TOPO). Depending on these transport parameters were calculated kinetics parameters such as: pseudo-first-order apparent membrane entrance and exit rate constants, the maximum flux at the entrance and exit out of the membrane. The highest values of the transport flux is obtained in the presence of carrier trioctylphosphine oxide (TOPO) at the concentration in the feed phase of 10-4 mol/L indole-3-acetic acid and a concentration of 10--2mol/L NaOH in the stripping phase.

Separation of indole-3-acetic acid from tryptophan by bulk liquid membrane

2020 ◽  
Vol 16 ◽  
Author(s):  
Ioana Diaconu ◽  
H.Y. Aboul-Enein ◽  
Cristina Orbeci ◽  
A.A. Bunaciu ◽  
Ecaterina Anca Serban ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Transport Process ◽  
Liquid Membrane ◽  
Organic Substrate ◽  
Biologically Active ◽  
Trioctylphosphine Oxide ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Operational Parameter ◽  
Indole 3 Acetic Acid

Background: Indole-3-acetic acid (IAA) is an important growth hormone for plants obtained by biosynthesis from tryptophan. Aim: In this paper was studied the competitive transport of two biologically active compounds, indole-3-acetic acid (IAA) and tryptophan (TRP) through a liquid membrane. Methods: The separation of the two compounds was obtained using a hybrid liquid membrane system having as a carrier trioctylphosphine oxide (TOPO). Results: The most important operational parameter of the system were studied, pH influence on the efficiency of the transport process in correlation with the speciation diagrams of the two compounds: TRP and IAA. The evaluation of the transport process was performed through calculating the composition of the phases at the end of the transport process and the organic substrate flow at the membranes exit. Conclusion: Due to the transport efficiency of over 90% in the case of IAA and the high selectivity at the transport between IAA and TRP, the procedure can be applied at the sample preparation containing these analytes.

scholarly journals Effects of process factors on performances of liquid membrane-based transfer of indole-3-acetic acid

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ioana Diaconu ◽  
Oana Cristina Pârvulescu ◽  
Sorina Laura Topală ◽  
Tănase Dobre
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Mass Transfer ◽  
Acetic Acid ◽  
Liquid Membrane ◽  
Bulk Liquid ◽  
Feed Phase ◽  
Process Factors ◽  
Positive Effect ◽  
Indole 3 Acetic Acid

AbstractThe paper has aimed at studying the transfer of indole 3-acetic acid (IAA) from a feed aqueous solution to a stripping aqueous solution of NaOH using a chloroform bulk liquid membrane and trioctylamine (TOA) as a ligand (L). Initial molar concentrations of IAA in the feed phase, cIAA,F0 (10–4–10–3 kmol/m3), of TOA in the membrane phase, cL,M0 (10–2 and 10–1 kmol/m3), and of NaOH in the stripping phase, cNaOH,S0 (10–2 and 1 kmol/m3), were selected as process factors. Their effects on the final values of IAA concentration in the feed phase (cIAA,Ff) and stripping solution (cIAA,Sf), extraction efficiency (EF), distribution coefficient (KD), and recovery efficiency (ER) were quantified using multiple regression equations. Regression coefficients were determined from experimental data, i.e., cIAA,Ff,ex = 0.02–1 × 10–4 kmol/m3, cIAA,Sf,ex = 0.22–2.58 × 10–3 kmol/m3, EF,ex = 90.0–97.9%, KD,ex = 9.0–46.6, and ER,ex = 66.5–94.2%. It was found that cIAA,F0 had the most significant positive effect on cIAA,Ff and cIAA,Sf, whereas cNaOH,S0 had a major positive effect on EF, KD, and ER. A deterministic model based on mass transfer of IAA was developed and its parameters, i.e., mass transfer coefficient of IAA-L complex in the liquid membrane (0.82–11.5 × 10–7 m/s) and extraction constant (1033.9–1779.7 m3/kmol), were regressed from experimental data. The effect of cL,M0 on both parameters was significant.

scholarly journals Effects of Process Factors on Performances of Liquid Membrane-Based Transfer of Indole-3-Acetic Acid

2021 ◽  
Author(s):  
Ioana Diaconu ◽  
Oana Cristina Pârvulescu ◽  
Sorina Laura Topală ◽  
Tănase Dobre
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Mass Transfer ◽  
Acetic Acid ◽  
Liquid Membrane ◽  
Bulk Liquid ◽  
Feed Phase ◽  
Process Factors ◽  
Positive Effect ◽  
Indole 3 Acetic Acid

Abstract The paper has aimed at studying the transfer of indole 3-acetic acid (IAA) from a feed aqueous solution to a stripping aqueous solution of NaOH using a chloroform bulk liquid membrane and trioctylamine (TOA) as a ligand (L). Initial molar concentrations of IAA in the feed phase, cIAA,F0 (10-4-10-3 kmol/m3), of TOA in the membrane phase, cL,M0 (10-2 and 10-1 kmol/m3), and of NaOH in the stripping phase, cNaOH,S0 (10-2 and 1 kmol/m3), were selected as process factors. Their effects on the final values of IAA concentration in the feed phase (cIAA,Ff) and stripping solution (cIAA,Sf), extraction efficiency (EF), distribution coefficient (KD), and recovery efficiency (ER) were quantified using multiple regression equations. Regression coefficients were determined from experimental data, i.e., cIAA,Ff,ex=0.02-1×10-4 kmol/m3, cIAA,Sf,ex=0.22-2.58×10-3 kmol/m3, EF,ex=90.0-97.9%, KD,ex=9.0-46.6, and ER,ex=66.5-94.2%. It was found that cIAA,F0 had the most significant positive effect on cIAA,Ff and cIAA,Sf, whereas cNaOH,S0 had a major positive effect on EF, KD, and ER. A deterministic model based on mass transfer of IAA was developed and its parameters, i.e., mass transfer coefficient of IAA-L complex in the liquid membrane (0.08-1.15×10-6 m/s) and extraction constant (1033.9-1779.7 m3/kmol), were regressed from experimental data. The effect of cL,M0 on both parameters was significant.

scholarly journals Kinetics and Mechanism ofmeso-Tetraphenylporphyrin Iron(III) Chloride Catalysed Oxidation of Indole-3-Acetic Acid by Peroxomonosulphate

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Durairaj Kungumathilagam ◽  
Kulanthaivel Karunakaran
Keyword(s):  
Acetic Acid ◽  
Reaction System ◽  
Kinetic Scheme ◽  
Mechanistic Study ◽  
Radical Mechanism ◽  
First Order ◽  
Catalysed Oxidation ◽  
Indole 3 Acetic Acid ◽  
Catalyst Increase ◽  
Acetonitrile Medium

Mechanistic study onmeso-tetraphenylporphyrin iron(III) chloride (TPP) catalysed oxidation of indole-3-acetic acid by peroxomonosulphate (oxone) in aqueous acetonitrile medium has been carried out. The reaction follows a first order with respect to both substrate and oxidant. The order with respect to catalyst was found to be fractional. The order of reaction with respect to catalyst varies with a concentration of catalyst. Increase in percentage of acetonitrile decreased the rate. The reaction fails to initiate polymerization, and a radical mechanism is ruled out. Activation and thermodynamic parameters have been computed. A suitable kinetic scheme based on these observations is proposed. Significant catalytic activity is observed for the reaction system in the presence of TPP.

Effect of kinetic synergist on transport of copper(II) through a liquid membrane containing P507 in kerosene

2001 ◽  
Vol 79 (8) ◽  
pp. 1213-1219 ◽  
Author(s):  
Dingsheng He ◽  
Ming Ma ◽  
Hui Wang ◽  
Pandeng Zhou
Keyword(s):  
Activation Energy ◽  
Liquid Membrane ◽  
Copper Ions ◽  
Bulk Liquid ◽  
Liquid Membranes ◽  
Bulk Liquid Membrane ◽  
First Order ◽  
Pseudo First Order ◽  
Feed Phase ◽  
Kinetics Of

A new kinetic synergism system for copper(II) transport through a bulk liquid membrane containing mono(2-ethyhexyl)-2-ethyhexyl phosphate and Manoxol OT (OT) was examined. The influence of stripping agent, anion, pH in feed phase, and carrier concentration were investigated. The kinetics of Cu(II) transport could be analyzed in the formalism of two consecutive irreversible first-order reactions, considering both extraction and stripping. The pseudo-first-order apparent rate constants of interfacial reactions in membrane transport are determined by altering the temperature. The activation energy values are 38.1 kJ mol–1 for extraction and 32.8 kJ mol–1 for stripping. The experiments demonstrated that Manoxol OT is a good kinetic synergist for Cu(II) transport through liquid membranes in this study. The kinetic synergism of OT for extraction of Cu2+ ions is analyzed.Key words: copper ions, kinetic synergist, liquid membrane.

scholarly journals Transport of Indole 3-acetic Acid through Bulk Liquid Membrane Influence of Carrier in the Diffusion Process

2019 ◽  
Vol 70 (8) ◽  
pp. 2716-2719
Author(s):  
Ioana Diaconu ◽  
Ecaterina Anca Serban ◽  
Georgiana Ileana Badea ◽  
Elena Ruse
Keyword(s):  
Acetic Acid ◽  
Liquid Membrane ◽  
Chemical Potential ◽  
Potential Gradient ◽  
Membrane System ◽  
Extraction Constant ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Acid Complex ◽  
Indole 3 Acetic Acid

The paper presents a study of the phenomena that take place at membrane system interfaces in the process of indole-3-acetic acid (IAA) transport. The results were obtained in a bulk liquid membrane system using trioctylamine, tributylphosphate, trioctilphosphine oxide as carriers in chloroform. The main equilibriums that take place at the interface feed phase% membrane phase were identified and the diffusion coefficient of the indole-3-acetic acid complex (DLS) and the extraction constant (Kex) were assessed. The influence of the chemical potential gradient on these parameters was considered.

Indole-3-acetic acid uptake in isolated protoplasts of the moss Funaria hygrometrica

1990 ◽  
Vol 80 (4) ◽  
pp. 584-592 ◽  
Author(s):  
Ulrike Geier ◽  
Olaf Werner ◽  
Martin Bopp
Keyword(s):  
Acetic Acid ◽  
Acid Uptake ◽  
Funaria Hygrometrica ◽  
Isolated Protoplasts ◽  
Indole 3 Acetic Acid
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