An overview of the mathematical modelling of liquid membrane separation processes in hollow fibre contactors

Bringas, Eugenio; Román, M. Fresnedo San; Irabien, Ángel; Ortiz, Inmaculada

doi:10.1002/jctb.2231

Cited by 72 publications

(33 citation statements)

References 162 publications

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“…The advantage of these technologies is their low energetic requirements [8]. Ion exchange membranes [9] and other membrane processes like those shown in this work are examples of this tendency.…”

Section: Introductionmentioning

confidence: 85%

Ionic liquids as a carrier for chloride reduction from brackish water using hollow fiber renewal liquid membrane

Fortuny¹,

Coll²,

Sastre³

2014

Desalination

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High concentration of chloride ions in continental water is a great problem for the exploitation of these natural resources. In industry, the use of this water involves additional conditioning steps. For drinking water and irrigation uses, the Cl- must be reduced by conventional water treatment processes, like ion exchange or reverse osmosis, but for large scale production these techniques could be very expensive due to resin regeneration or energy costs. The possibility of using supported liquid membranes (SLM) with ionic liquids (IL), Aliquat 336, Cyphos IL 101 and Cyphos IL 167, as carriers to exchange Cl- for HCO3- anion has been shown to work. The reversibility of this anion exchange was corroborated by solvent extraction experiments and implemented in flat sheet supported liquid membrane (FSSLM) and hollow fiber renewal liquid membrane technologies (HFRLM). About double transport values have been obtained in HFRLM compared to SLM and 1 h is the time enough to reduce the chloride concentration up to 250 mg/L using HFRLM at the best experimental condition. The results obtained allow us to be optimistic about the implementation of this technology on a large scale to chloride reduction in drinking water when the source is inadequate for direct use. (C) 2013 Elsevier B.V. All rights reserved.Peer ReviewedPreprin

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Section: Introductionmentioning

confidence: 85%

Ionic liquids as a carrier for chloride reduction from brackish water using hollow fiber renewal liquid membrane

Fortuny¹,

Coll²,

Sastre³

2014

Desalination

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“…The differential form of mass balance (also called the convection and diffusion equation) can be written as (Bringas et al, 2009) ,…”

Section: Model Formulationmentioning

confidence: 99%

Non-dispersive solvent extraction of p-toluic acid from purified terephthalic acid plant wastewater with p-xylene as extractant

Kong

Cheng

Wang

et al. 2016

J. Zhejiang Univ. Sci. A

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Non-dispersive solvent extraction (NDSE) with p-xylene as extractant was employed as a novel separation method to recover both p-toluic (PT) acid and water from purified terephthalic acid (PTA) wastewater. The mass transport behavior of PT acid from aqueous solution to p-xylene was investigated by experiments and numerical simulation. Experiments showed that NDSE is feasible and effective. Residual PT acid in the raffinate can be reduced to lower than the permitted limit of wastewater re-use (100 g/m 3 ) with extraction time longer than 60 s in industrial conditions. A mathematical model of PT acid mass transport was developed to optimize the membrane module performance. The model was validated with the experimental results with relative errors of less than 6%. Numerical analysis for mass transfer through the lumen side, the porous membrane layer, and the shell side showed that PT acid transport in the aqueous solution is the rate determining step. The effects of the membrane and operating parameters on membrane module performance were investigated by means of computational simulations. The key parameters suggested for industrial NDSE design are: fiber inner radius r 1 =200-250 μm, extraction time t e =50-60 s, aqueous/ organic volumetric ratio a/o=9.0, and temperature T=318 K.

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“…In a recent publication [35] , it was reviewed the various approaches to the mathematical modeling of liquid membrane separation processes in hollow fiber contactors. Besides the simplified model described above, in hollow fiber modules, two different approaches are commonly considered to relate the interfacial concentrations: i) diffusional-kinetic regime, in which the chemical reaction of the extraction process is considered to be fast and, thus, the equilibrium is reached instantaneously.…”

Section: Modelization In Supported Liquid Membranes Technologiesmentioning

confidence: 99%

“…Non-dispersive solvent extraction membrane technology, using an organic solution of 30 % v/v TBP in n-dodecane, was effectively used to extract uranium(VI) in macroconcentrations (35 solution was 0.05 M nitric acid. It was established to recover more than 90 % of uranium(VI) from oxalate supernatant waste, which is often generated from nuclear chemical facilities [116] .…”

Section: Some Applicationsmentioning

confidence: 99%

Supported liquid membranes technologies in metals removal from liquid effluents

Agreda¹,

García‐Díaz²,

López³

et al. 2011

REVMETAL

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The generation of liquid effluents containing organic and inorganic residues from industries present a potential hazardousness for environment and human health, being mandatory the elimination of these pollutants from the respective solutions containing them. In order to achieve this goal, several techniques are being used and among them, supported liquid membranes technologies are showing their potential for their application in the removal of metals contained in liquid effluents. Supported liquid membranes are a combination between conventional polymeric membranes and solvent extraction. Several configurations are used: flat-sheet supported liquid membranes, spiral wounds and hollow fiber modules. In order to improve their effectiveness, smart operations have been developed: non-dispersive solvent extraction, non-dispersive solvent extraction with strip phase dispersion and hollow fiber renewal liquid membrane. This paper overviewed some of these supported liquid membranes technologies and their applications to the treatment of metal-bearing liquid effluents. KeywordsSupported liquid membranes; Metals; Extractants; Ionic liquids; liquid effluents; Environment. Tecnologías de membranas líquidas soportadas en la eliminación de metales de efluentes líquidos ResumenLa generación, por parte de las industrias, de efluentes líquidos conteniendo sustancias orgánicas e inorgánicas, es un peligro potencial tanto para los humanos como para el medio ambiente, siendo necesaria la eliminación de estos elementos tóxicos de las disoluciones que los contienen. Para conseguir este fin, se están aplicando diversas técni-cas y entre ellas las tecnologías de membranas líquidas soportadas, están demostrando sus aptitudes para la eliminación de metales contenidos en efluentes líquidos. Las membranas líquidas soportadas, resultan de la unión de las membranas poliméricas y de la tecnología de extracción líquido-líquido. Este tipo de membranas se pueden utilizar en diversas configuraciones: plana, módulo en fibra hueca y módulo en espiral y para aumentar su efectividad se están desarrollando las llamadas operaciones avanzadas: extracción no dispersiva, extracción no dispersiva con dispersión de la fase de reextracción y empleo del módulo de fibra hueca, con renovación de la membrana líquida. En este trabajo se revisan estas operaciones de membranas líquidas soportadas y algunas de las aplicaciones de las mismas, en el tratamiento de efluentes líquidos conteniendo metales. Palabras claveMembranas líquidas soportadas; Metales; Agentes de extracción; Líquidos iónicos; Efluentes líquidos; Medio ambiente.

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An overview of the mathematical modelling of liquid membrane separation processes in hollow fibre contactors

Cited by 72 publications

References 162 publications

Ionic liquids as a carrier for chloride reduction from brackish water using hollow fiber renewal liquid membrane

Ionic liquids as a carrier for chloride reduction from brackish water using hollow fiber renewal liquid membrane

Non-dispersive solvent extraction of p-toluic acid from purified terephthalic acid plant wastewater with p-xylene as extractant

Supported liquid membranes technologies in metals removal from liquid effluents

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