Separation of Cd(II) and Ni(II) ions by supported liquid membrane using D2EHPA/M2EHPA as mobile carrier

2014 ◽  
Vol 68 (6) ◽  
Author(s):  
Roghaye Mahmoodi ◽  
Toraj Mohammadi ◽  
Mansoor Moghadam
Keyword(s):  
Carrier Concentration ◽  
Separation Factor ◽  
Liquid Membrane ◽  
Supported Liquid Membrane ◽  
Feed Concentration ◽  
Experimental Conditions ◽  
Ptfe Film ◽  
Mobile Carrier ◽  
Maximum Value ◽  
Separation Factors

AbstractThe separation of Cd(II) and Ni(II) ions was studied in an aqueous sulphate medium using supported liquid membrane (SLM). D2EHPA/M2EHPA was used as a mobile carrier, microporous hydrophobic PTFE film was used as a solid support for the liquid membrane, and the strip phase was sulphuric acid. The effects of different parameters such as feed concentration, carrier concentration, feed phase pH, and strip phase pH on the separation factor and flux of Cd(II) and Ni(II) ions were studied. The optimum values obtained to achieve the maximum flux were 5.0 for feed pH, 40 vol. % for D2EHPA/M2EHPA concentration in the membrane phase, 0.5 for strip pH, and 0.012 mass % for feed concentration. Under these optimum conditions, the flux values of Cd(II) and Ni(II) were 15.7 × 10−7 kg m−2 s−1 and 2.6 × 10−7 kg m−2 s−1, respectively. The separation factors of Cd(II) over Ni(II) were studied under different experimental conditions. At a carrier concentration of 10 vol. % and feed concentration of 0.012 mass %, the maximum value of 185.1 was obtained for the separation factor of Cd(II) over Ni(II). After 24 h, the percentages of the extracted Cd(II) and Ni(II) were 83.3 % and 0.45 %, respectively.

Pertraction of cadmium and zinc ions using a supported liquid membrane impregnated with different carriers

2013 ◽  
Vol 67 (4) ◽  
Author(s):  
Mohammad Peydayesh ◽  
Gholam Esfandyari ◽  
Toraj Mohammadi ◽  
Eskandar Alamdari
Keyword(s):  
Phosphoric Acid ◽  
Carrier Concentration ◽  
Metal Ion ◽  
Liquid Membrane ◽  
Feed Solution ◽  
Supported Liquid Membrane ◽  
Optimum Conditions ◽  
Feed Concentration ◽  
Experimental Conditions ◽  
Cyanex 302

AbstractAn experimental study on the removal of Cd2+ and Zn2+ through a supported liquid membrane using a mixture of mono-(2-etylhexyl) ester of phosphoric acid (M2EHPA) and bis-(2-etylhexyl) ester of phosphoric acid (D2EHPA) as carriers is presented. Parameters affecting the Cd2+ and Zn2+ pertraction such as feed concentration, carrier concentration, pH of the stripping phase, and TBP (tributyl phosphate) concentration were analyzed using the Taguchi method. Optimal experimental conditions for Cd2+ and Zn2+ pertraction were obtained using the analysis of variance (ANOVA) after a 6 h separation with the initial feed concentration of 8.9 × 10−4 mol L−1, carrier concentration of 20 vol. %, TBP concentration of 4 vol. %, and pH of 0.5. Then, under optimum conditions, a comparison of M2EHPA, D2EHPA, and bis-(2,4,4-trimethylpentyl)monothiophosphinic acid (Cyanex 302) was performed. Effective pertraction of Cd2+ and Zn2+ using these carriers was observed in the following order: mixture of M2EHPA and D2EHPA, D2EHPA, Cyanex 302. It was also found that the presence of one metal ion in the feed solution reduces the pertraction rate of the other one.

scholarly journals Pertraction of Co(II) through Novel Ultrasound Prepared Supported Liquid Membranes Containing D2EHPA. Optimization and Transport Parameters

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 436
Author(s):  
Gerardo León ◽  
Asunción María Hidalgo ◽  
Beatriz Miguel ◽  
María Amelia Guzmán
Keyword(s):  
Boundary Layer ◽  
Sulfuric Acid ◽  
Carrier Concentration ◽  
Liquid Membrane ◽  
Supported Liquid Membrane ◽  
Liquid Membranes ◽  
Membrane Phase ◽  
Experimental Conditions ◽  
Supported Liquid Membranes ◽  
Aqueous Feed

Pertraction of Co(II) through novel supported liquid membranes prepared by ultrasound, using bis-2-ethylhexyl phosphoric acid as carrier, sulfuric acid as stripping agent and a counter-transport mechanism, is studied in this paper. Supported liquid membrane characterization through scanning electron microscopy, energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy shows the impregnation of the microporous polymer support by the membrane phase by the action of ultrasound. The effect on the initial flux of Co(II) of different experimental conditions is analyzed to optimize the transport process. At these optimal experimental conditions (feed phase pH 6, 0.5 M sulfuric acid in product phase, carrier concentration 0.65 M in membrane phase and stirring speed of 300 rpm in both phases) supported liquid membrane shows great stability. From the relation between the inverse of Co(II) initial permeability and the inverse of the square of carrier concentration in the membrane phase, in the optimized experimental conditions, the transport resistance due to diffusion through both the aqueous feed boundary layer (3.7576 × 104 s·m−1) and the membrane phase (1.1434 × 1010 s·m−1), the thickness of the aqueous feed boundary layer (4.0206 × 10−6 m) and the diffusion coefficient of the Co(II)-carrier in the bulk membrane (4.0490 × 10−14 m2·s−1), have been determined.

Research on Cu(II) Transfer Using Supported Liquid Membrane

2013 ◽  
Vol 790 ◽  
pp. 41-44
Author(s):  
Xiao Jiao Yu ◽  
Fan Zhang ◽  
Lin Zhu Huang ◽  
Jie Zhao ◽  
Jian Zhang
Keyword(s):  
Carrier Concentration ◽  
Migration Rate ◽  
Polyvinylidene Fluoride ◽  
Liquid Membrane ◽  
Feed Solution ◽  
Migration Time ◽  
Supported Liquid Membrane ◽  
Solution Ph ◽  
Experimental Conditions

Supported liquid membrane is established by using 2-Ethylhexylphosphoric acid mono-2-ethylhexyl ester as carrier, kerosene as membrane solvent and Polyvinylidene fluoride membrane as matrix. This article analyzes the effects of Cu (II) concentration, migration time, carrier concentration and feed solution pH for the rate of migration by means of monofactor experiments to obtain the optimum experimental conditions. The results indicate that the migration rate of Cu (II) with the optimical conditions as following: Cu (II) concentration at 4×10-4mol/L, migration time at 120min, carrier concentration at 7% and feed solution pH at 5.0, attains to 83.5%, which is the optimum value of Cu (II) migration.

Dysprosium pertraction through facilitated supported liquid membrane using D2EHPA as carrier

2015 ◽  
Vol 69 (2) ◽  
Author(s):  
Parisa Zaheri ◽  
Hossein Abolghasemi ◽  
Toraj Mohammadi ◽  
Mohammad Ghannadi Maraghe
Keyword(s):  
Taguchi Method ◽  
Phosphoric Acid ◽  
Liquid Membrane ◽  
Solution Concentration ◽  
Supported Liquid Membrane ◽  
Membrane Phase ◽  
Feed Concentration ◽  
Experimental Conditions ◽  
Hno3 Solution ◽  
Feed Phase

AbstractThe pertraction of dysprosium (Dy) through a supported liquid membrane (SLM) system consisting of PTFE (polytetrafluoroethylene) support, D2EHPA (di-2-ethylhexyl phosphoric acid) dissolved in kerosene as membrane solution, and HNO3 solution as stripping solution, was studied. The experiments were designed by the Taguchi method in order to investigate the effects of initial Dy concentration, feed phase pH, different stripping solution concentration, and D2EHPA concentration in the membrane phase on Dy pertraction. Optimal experimental conditions for Dy pertraction were obtained using an analysis of variance (ANOVA) (feed concentration: 130 mg L

scholarly journals Copper recovery in a bench-scale carrier facilitated tubular supported liquid membrane system

2010 ◽  
Vol 46 (1) ◽  
pp. 67-73 ◽  
Author(s):  
S. Makaka ◽  
M. Aziz ◽  
A. Nesbitt
Keyword(s):  
Sherwood Number ◽  
Liquid Membrane ◽  
Copper Ions ◽  
Membrane System ◽  
Copper Recovery ◽  
Supported Liquid Membrane ◽  
Shell Side ◽  
Copper Solution ◽  
Mobile Carrier ◽  
Double Pipe

The extraction of copper ions in a tubular supported liquid membrane using LIX 984NC as a mobile carrier was studied, evaluating the effect of the feed characteristics (flowrate, density, viscosity) on the feedside laminar layer of the membrane. A vertical countercurrent, double pipe perspex benchscale reactor consisting of a single hydrophobic PVDF tubular membrane mounted inside was used in all test work. The membrane was impregnated with LIX 984NC and became the support for this organic transport medium. Dilute Copper solution passed through the centre pipe and sulphuric acid as strippant passed through the shell side. Copper was successfully transported from the feedside to the stripside and from the data obtained, a relationship between Schmidt, Reynolds and Sherwood number was achieved of.

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