Mathematical model for swelling in a liquid emulsion membrane system

Mukhopadhyay, S.; Ghosh, S. K.; Juvekar, Vinay A.

doi:10.1016/j.desal.2008.01.009

Cited by 15 publications

(9 citation statements)

References 25 publications

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“…The slightly decreasing tendency in ibuprofen recovery percentages can be explained by comparing the drop size distributions obtained for each TOA concentration. There is an optimal droplet size (around 1 µm), below which the drops are rigid, which slows the transfer in and may limit the kinetics of passage, above this the drops circulate, so there is no transfer limitation inside and kinetics depends on the interfacial area which increases as the internal diameter decreases …”

Section: Resultsmentioning

confidence: 99%

Emulsion liquid membranes for recovery of ibuprofen from aqueous solutions

Razo-Lazcano

Stambouli

González-Muñoz

et al. 2014

J of Chemical Tech & Biotech

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International audienceBACKGROUNDThis work involved a systematic study of the recovery of ibuprofen (IBP) from aqueous solutions by emulsion liquid membranes (ELM).RESULTSA preliminary liquid–liquid extraction study was performed in order to determine the most appropriate system to extract the IBP. The results show that Parleam 4 and NaOH work very well as extractant and strippant, respectively. The conditions for preparing the ELMs were established. The influence of parameters such as the agitation speed, preparation time and composition of the ELM were evaluated for membrane stability (by laser diffraction) and for IBP recovery efficiency. It was also shown that the influence of trioctylamine (TOA) in the ELM is such that only a low concentration is required to obtain stable and highly efficient membranes.CONCLUSIONThe membrane prepared with Parleam 4 + TOA 0.1% w/V + Abil EM 90 at 5% w/V as organic phase, and NaOH 0.05 mol L-1, as internal aqueous phase, showed the highest recovery percentages (> 99%) with a very fast kinetic transfer (5 minutes of contact). © 2014 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Emulsion liquid membranes for recovery of ibuprofen from aqueous solutions

Razo-Lazcano

Stambouli

González-Muñoz

et al. 2014

J of Chemical Tech & Biotech

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“…To capture the emulsion globule image, a tiny drop of the emulsion was dispersed onto a glass slide containing a pool of external phase to form a W/O/W system. 18 The images obtained were analyzed and measured three times to observe and get an average diameter value of the emulsion size. The emulsion size is expressed as droplets diameter or Sauter diameter ( d 32 ), which represents the average surface diameter as follows 19 , 20 where n i and d i are the number and droplets diameter of the ith class, respectively, and V and A are the total volume and the area of the dispersed phase, respectively.…”

Section: Experimental Methodsmentioning

confidence: 99%

Stability Study of Emulsion Liquid Membrane via Emulsion Size and Membrane Breakage on Acetaminophen Removal from Aqueous Solution Using TOA

et al. 2020

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The purpose of this study is to explore the emulsion liquid membrane stability for acetaminophen (ACTP) removal from aqueous solution. In this work, the membrane phase was prepared by dissolving trioctylamine (TOA) with kerosene and Span80. The stability of the emulsion in terms of emulsion size, membrane breakage, and its efficiency in removing ACTP was considered for the optimization of parameters. Investigation on the stability of emulsion was carried out by manipulating the concentration of stripping agent, agitation speed, extraction time, and treat ratio. The best condition to produce a very stable emulsion was achieved at 0.1 M of stripping agent concentration, with 300 rpm of agitation speed for 3 min of extraction time with a treat ratio of 3:1. Eighty-five percent of ACTP successfully stripped into the emulsion with minimum membrane breakage of 0.17% through this experiment.

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“…Focusing on the storage of double emulsions, the phenomena that may occur are the coalescence of inner and/or outer droplets, Ostwald ripening, and shrinkage or swelling of inner and so of the outer droplets. [37][38][39][40][41][42] Moreover, the release of the encapsulated substance can take place either by molecular diffusion of the encapsulated substance to the external phase or by coalescence of the inner droplet with the external phase, called "escape." [3,5,[42][43][44][45][46] When the solubility of the substance used in the oil phase in W/O/W double emulsion is low, the release is governed only by escape (i.e., molecular diffusion of the encapsulated substance in oil is negligible).…”

Section: Phenomenological Model Of Droplets Swelling and Releasementioning

confidence: 99%

Low‐Field High‐Resolution PFG‐NMR to Predict the Size Distribution of Inner Droplets in Double Emulsions

Khadem

Parrott

Nordon

et al. 2020

Euro J Lipid Sci & Tech

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In double emulsions, the inner and outer droplet size distribution (DSD) determines the quality of the double emulsion and is therefore essential to be measured. Low‐field high‐resolution pulsed‐field gradient nuclear magnetic resonance is used to measure the inner DSD in water‐in‐oil‐in‐water double emulsions. The Gaussian phase distribution approach is employed with a mixture of two normal distributions to predict bimodal inner droplets. This approach allows the prediction of the swelling of inner droplet during storage of double emulsions, and thus to validate a phenomenological population balance model estimating inner droplet swelling. Only a fraction of the inner droplets are found to swell during storage, due to differences in the Laplace pressure, thus leading to the formation of a bimodal size distribution of the inner droplets. Practical Applications: This methodology is useful to predict the evolution of double emulsions during storage, in a wide range of applications, such as food and pharmaceutical products.

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Mathematical model for swelling in a liquid emulsion membrane system

Cited by 15 publications

References 25 publications

Emulsion liquid membranes for recovery of ibuprofen from aqueous solutions

Emulsion liquid membranes for recovery of ibuprofen from aqueous solutions

Stability Study of Emulsion Liquid Membrane via Emulsion Size and Membrane Breakage on Acetaminophen Removal from Aqueous Solution Using TOA

Low‐Field High‐Resolution PFG‐NMR to Predict the Size Distribution of Inner Droplets in Double Emulsions

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