scholarly journals Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl−/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 432
Author(s):  
Francisco J. Alguacil ◽  
Lorena Alcaraz ◽  
Olga R. Largo ◽  
Félix A. López
Keyword(s):  
Ionic Liquid ◽  
Metal Transport ◽  
Metal Species ◽  
Membrane Diffusion ◽  
Kinetics Parameters ◽  
Hydrochloric Acid Medium ◽  
Equilibrium And Kinetics ◽  
Support Optimization ◽  
Feed Phase ◽  
Hcl Medium

By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327H+Cl− was generated and used to investigate its performance in the transport of Au(III) from hydrochloric acid medium. The influence of the stirring speed (600–1800 min−1), ionic liquid concentration (1.25–50% v/v) in the membrane phase, and gold concentration (0.01–0.15 g/L) in the feed phase on metal transport have been investigated. An equation which included both equilibrium and kinetics parameters was derived, and the membrane diffusional resistance (Δm) and feed phase diffusional resistance (Δf) was estimated as 9.5 × 106 s/cm and 307 s/cm, respectively. At carrier concentrations in the 5–50% v/v range and gold concentrations in the 0.01–0.15 g/L range, metal transport is controlled by diffusion of metal species through the feed boundary layer, whereas at the lowest carrier concentrations, membrane diffusion is predominant. From the receiving solutions, gold can be recovered as gold nanoparticles.

scholarly journals Transport of Au(III) from HCl medium across a liquid membrane using R3NH+Cl-/toluene immobilized on a microporous hydrophobic support: optimization and modelling

2020 ◽  
Author(s):  
Francisco J. Alguacil ◽  
Lorena Alcaraz ◽  
Olga Rodríguez Largo ◽  
Félix A. López
Keyword(s):  
Ionic Liquid ◽  
Metal Transport ◽  
Metal Species ◽  
Membrane Diffusion ◽  
Kinetics Parameters ◽  
Hydrochloric Acid Medium ◽  
Equilibrium And Kinetics ◽  
Support Optimization ◽  
Feed Phase ◽  
Hcl Medium

By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327H+Cl- was generated and used to investigate its performance in the transport of Au(III) form hydrochloric acid medium. The influence of the stirring speed (600-1800 min-1), ionic liquid concentration (1.25-50% v/v) in the membrane phase and gold concentration (0.01-0.15 g/L) in the feed phase on metal transport have been investigated. An equation which included both equilibrium and kinetics parameters was derived, and the membrane diffusional resistance (Δm) and feed phase diffusional resistance (Δf) was estimated as 9.5x106 s/cm and 307 s/cm, respectively. At carrier concentrations in the 5-50% v/v range and gold concentrations in the 0.01-0.15 g/L range, metal transport is controlled by diffusion of metal species through the feed boundary layer, whereas at the lowest carrier concentrations, membrane diffusion is predominant. From the receiving solutions, gold can be recovered as gold nanoparticles.

scholarly journals Liquid-Liquid Extraction of Indium(III) from the HCl Medium by Ionic Liquid A327H+Cl− and Its Use in a Supported Liquid Membrane System

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5238
Author(s):  
Francisco José Alguacil
Keyword(s):  
Ionic Liquid ◽  
Liquid Membrane ◽  
Membrane System ◽  
Liquid Extraction ◽  
Supported Liquid Membrane ◽  
Distribution Data ◽  
Membrane Phase ◽  
Liquid Liquid Extraction ◽  
Feed Phase ◽  
Hcl Medium

Ionic liquid A327H+Cl− was generated by reaction of tertiary amine A327 and HCl, and the liquid-liquid extraction of indium(III) from the HCl medium by this ionic liquid dissolved in Solvesso 100 was investigated. The extraction reaction is exothermic. The numerical analysis of indium distribution data suggests the formation of A327H+InCl4− in the organic phase. The results derived from indium(III) extraction have been implemented in a supported liquid membrane system. The influence of the stirring speed (600–1200 min−1), carrier concentration (2.5–20% v/v) in the membrane phase, and indium concentration (0.01–0.2 g/L) in the feed phase on metal transport have been investigated.

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.

Atrazine in mineral soil: chemical species and catalysed hydrolysis

1992 ◽  
Vol 70 (6) ◽  
pp. 1597-1603 ◽  
Author(s):  
Donald S. Gamble ◽  
Shahamat U. Khan
Keyword(s):  
Mineral Soil ◽  
Chemical Species ◽  
Organic Soil ◽  
Kinetics Parameters ◽  
Equilibrium Function ◽  
Data Scatter ◽  
Acidic Sites ◽  
Equilibrium And Kinetics ◽  
Relationship Of ◽  
The Relationship

Equilibrium and kinetics parameters have been evaluated at 25.0 °C for the heterogeneous catalysis of atrazine hydrolysis in slurries of a chemically characterized mineral soil. The fraction of acidic sites that accounts for sorption capacity, and the sorption equilibrium function resemble those for humic acid and organic soil. Sorption and desorption half-lives increased with increasing coverage of sorption sites. The sorption half-lives ranged from 3.6 to 735 days. The desorption half-lives ranged from 1 to 11 days. The hydrolysis half-lives ranged from 9.6 to 168 days and are consistent with Brönsted acid catalysis theory. The relationship of independent variables to data scatter has been analyzed. The information obtained should be useful for water and solute transport models.

A 2-mercaptobenzothiazole-functionalized ionic liquid for selective extraction of Pd(ii) from a hydrochloric acid medium

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 63006-63012 ◽  
Author(s):  
Hong Zhang ◽  
Chen Wang ◽  
Yan Zheng ◽  
Shubin Wang ◽  
Zhaohui Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Hydrochloric Acid ◽  
Acid Medium ◽  
Selective Extraction ◽  
Functionalized Ionic Liquid ◽  
Hydrochloric Acid Medium ◽  
Excellent Selectivity

A novel 2-mercaptobenzothiazole-functionalized ionic liquid (1,10-bis(3-methylimidazolium-1-yl)decane bis(triflic)imide two 2-mercaptobenzothiazolate, {[C10(mim)2]2+ 2 [MBT]−}) with excellent selectivity for Pd(ii) extraction was fabricated.

scholarly journals Metal species involved in long distance metal transport in plants

2014 ◽  
Vol 5 ◽  
Author(s):  
Ana Álvarez-Fernández ◽  
Pablo Díaz-Benito ◽  
Anunciación Abadía ◽  
Ana-Flor López-Millán ◽  
Javier Abadía
Keyword(s):  
Metal Transport ◽  
Metal Species ◽  
Long Distance

scholarly journals Permeation of AuCl4− Across a Liquid Membrane Impregnated with A324H+Cl− Ionic Liquid

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 363 ◽  
Author(s):  
Francisco José Alguacil ◽  
Félix A. López
Keyword(s):  
Ionic Liquid ◽  
Liquid Membrane ◽  
Extraction Constant ◽  
Hydrodynamic Conditions ◽  
Membrane Diffusion ◽  
Extraction Equilibrium ◽  
Liquid Liquid Extraction ◽  
Flat Sheet ◽  
Boundary Layer Diffusion ◽  
Aqueous Feed

In the system Au(III)-HCl-A324H+Cl−, liquid-liquid extraction experiments were used to define the extraction equilibrium and the corresponding extraction constant; furthermore, the facilitated transport of this precious metal from HCl solutions across a flat-sheet supported liquid membrane was investigated using the same ionic liquid as a carrier, and as a function of different variables: hydrodynamic conditions, concentration of gold(III) (0.01–0.1 g/L), and HCl (0.5–6 M) in the feed phase, and carrier concentration (0.023–0.92 M) in the membrane. An uphill transport equation was derived considering aqueous feed boundary layer diffusion and membrane diffusion as controlling steps. The aqueous diffusional resistance (Δf) and the membrane diffusional resistance (Δm) were estimated from the proposed equation with values of 241 s/cm and 9730 s/cm, respectively. The performance of the present carrier was compared against results yielded by other ionic liquids, and the influence that other metals had on gold(III) transport from both binary or quaternary solutions was also investigated. Gold was finally recovered from receiving solutions as zero valent gold nanoparticles.

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