Mass transfer and equilibrium characteristics of defluorination from groundwater by emulsion liquid membrane

2016 ◽  
Vol 92 (1) ◽  
pp. 76-82 ◽  
Author(s):  
Changwen Ye ◽  
Youhong Sun ◽  
Xiangjun Pei ◽  
Jin Sun ◽  
Yang Wu
Keyword(s):  
Mass Transfer ◽  
Liquid Membrane ◽  
Emulsion Liquid Membrane

scholarly journals Emulsion Liquid Membrane for Cadmium Removal: Experimental Results and Model Prediction

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
A. L. Ahmad ◽  
Adhi Kusumastuti ◽  
M. M. H. Shah Buddin ◽  
D. C. J. Derek ◽  
B. S. Ooi
Keyword(s):  
Mass Transfer ◽  
Model Prediction ◽  
Liquid Membrane ◽  
Volume Ratio ◽  
Membrane System ◽  
Extraction Process ◽  
Transfer Model ◽  
Emulsion Liquid Membrane ◽  
Cadmium Removal ◽  
External Phase

A study on mass transfer model for cadmium extraction in emulsion liquid membrane system has been done. Mass transfer in the external phase and emulsion globule, stripping reaction, and diffusion of the complex were taken account into the model. Reaction and chemical equilibrium of the process were also considered. The partial differential equation was numerically solved using MATLAB software. Effect of some parameters such as acid concentration in the external phase, extraction speed, volume ratio of emulsion to feed phase, volume ratio of internal to membrane phase, and initial concentration to the extraction process were investigated and compared to the model. The model prediction can agree very well with the concentration profile of cadmium in each phase.

Neodymium pertraction through sunflower oil-based emulsion liquid membrane: stability and mass transfer investigation

2020 ◽  
Vol 187 ◽  
pp. 333-344
Author(s):  
Maliheh Raji ◽  
Hossein Abolghasemi ◽  
Jaber Safdari ◽  
Payman Davoodi-Nasab
Keyword(s):  
Mass Transfer ◽  
Sunflower Oil ◽  
Liquid Membrane ◽  
Membrane Stability ◽  
Emulsion Liquid Membrane

scholarly journals MATHEMATICAL MODELING FOR THE EXTRACTION OF URANIUM AND MOLYBDENUM WITH EMULSION LIQUID MEMBRANE, INCLUDING INDUSTRIAL APPLICATION AND COST EVALUATION OF THE URANIUM RECOVERY

2008 ◽  
Vol 2 (1) ◽  
pp. 63
Author(s):  
Kris Tri Basuki
Keyword(s):  
Mass Transfer ◽  
Liquid Membrane ◽  
Phase Interface ◽  
Cost Evaluation ◽  
Membrane Systems ◽  
Emulsion Liquid Membrane ◽  
Uranium Recovery ◽  
Internal Phase ◽  
External Phase ◽  
Solute Carrier

MATHEMATICAL MODELING FOR THE EXTRACTION OF URANIUM AND MOLYBDENUM WITH EMULSION LIQUID MEMBRANE, INCLUDING INDUSTRIAL APPLICATION AND COST EVALUATION OF THE URANIUM RECOVERY. Emulsion liquid membrane systems are double emulsion drops. Two immiscible phases are separated by a third phase which is immiscible with the other two phases. The liquid membrane systems were classified into two types: (1) carrier mediated mass transfer, (2) mass transfer without any reaction involved. Uranium extraction, molybdenum extraction and solvent extraction were used as purposed elements for each type of the membrane systems in the derivation of their mathematical models. Mass transfer in emulsion liquid membrane (ELM) systems has been modeled by several differential and algebraic equations. The models take into account the following : mass transfer of the solute from the bulk external phase to the external phase-membrane interface; an equilibrium reaction between the solute and the carrier to form the solute- carrier complex at the interface; mass transfer by diffusion of the solute-carrier complex in the membrane phase to the membrane-internal phase interface; another equilibrium reaction of the solute-carrier complex to release the solute at the membrane-internal phase interface into the internal phase. Models with or without the consideration of film resistances were developed and compared. The models developed in this study can predict the extraction rate through emulsion liquid membranes theoretically. All parameters required in the models can be determined before an experimental extraction run. Experimental data from  literature (uranium extraction) and (molybdenum extraction and solvent extraction) were used to test the models. The agreements between the theoretical predictions and the experimental data were very good. The advantages of emulsion liquid membrane systems over traditional methods were discussed. The models developed in this research can be used directly for the design of emulsion liquid membrane systems. The results of this study represent a very significant step toward the practical applications of the emulsion liquid membrane technology.

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