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  • Cu(II) extraction using quaternary ammonium and quaternary phosphonium based ionic liquid

     Castillo, Jonathan; Coll Ausio, Maria Teresa; Fortuny Sanroma, Agustin; Navarro Donoso, Patricio; Sepulveda, Rossana; Sastre Requena, Ana Maria
    Hydrometallurgy
    Date of publication: 2014-01-01
    Journal article

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    This work analyses the extraction of Cu(II) using quaternary ammonium and quaternary phosphonium based ionic liquids. Firstly, the chemical suitability of the two ionic liquids was evaluated. They were then tested for extracting copper from solutions (simulated) of liquid mining waste. The effects of the extractant concentration, the sulphate concentration and the stripping solution were studied and the resulting information allowed us to propose a reaction mechanism. Finally, tests were performed using supported liquid membranes (SLM). The results with the synthesised ionic liquids show that [A336/Cy272] is suitable in sulphate, chloride and mixed media, while [C104] is suitable in chloride media. Liquid/liquid extraction tests indicate that it is possible to remove Cu(II) from highly contaminated aqueous solutions (1000 mg/L Cu(II)) using quaternary ammonium type ionic liquids in sulphate, chloride or mixed media, with extraction efficiencies of up to 95%. The best stripping results were obtained in basic and acid media. In contrast, a fouling problem of the membrane was found in supported liquid membrane tests, which occurs after approximately 4 h of testing. (C) 2013 Elsevier B.V. All rights reserved.

  • Equilibrium and dynamic studies for adsorption of boron on calcium alginate gel beads using principal component analysis (PCA) and partial least squares (PLS)

     Ruiz Planas, Montserrat; Roset Calzada, M. Lourdes; Demey Cedeño, Hary; Castro, S.; Sastre Requena, Ana Maria; Perez Gonzalez, Juan Jesus
    Materialwissenschaft und Werkstofftechnik
    Date of publication: 2013-05-29
    Journal article

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    In this paper, boron removal from aqueous solutions by adsorption on calcium alginate gel beads was investigated. Based on the batch tests, calcium alginate gel beads demonstrated a good capacity of adsorption; the maximum capacity obtained was 121 mg/g at pH 6. The aim of this paper is the study of analytical tools for extracting more analytical information from a few experiments. Principal component analysis (PCA) was employed to perform a comparative analysis between different isotherms obtained by varying the percentage of alginate on the adsorbent beads. The calculated fraction of the cumulative sum of squares for all the components (R2X(cum)) and the predictive reliability model based on the value of the correlation coefficient of cross validation (Q2 (cum)) obtained were 0.9639 and 0.8523, respectively. Dynamic system study using 20 different columns was carried out. Partial least squares (PLS) modeling are applied to characterize the effect of the experimental variables on the adsorption process. Some of the descriptors studied were the initial boron concentration (Co), adsorbent mass (m), pH, column diameter (dc), column depth (Z) and superficial flow velocity (U0). Experimental adsorptions were compared against predicted adsorptions and a correlation coefficient (r2) of 0.9927 was obtained.

  • Sorption of boron calcium alginate gel beads

     Ruiz Planas, Montserrat; Tobalina, Carlos; Demey Cedeño, Hary; Barron Zambrano, Jesus Alberto; Sastre Requena, Ana Maria
    Reactive and functional polymers
    Date of publication: 2013-04
    Journal article

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    In this work, the removal of boron by a biopolymer of alginate was studied in an aqueous solution. The effects of pH, initial boron concentration, alginate concentration in the beads and stirring time were evaluated. The ratio of mannuronic acid to guluronic acid (M/G) in the alginic acid used in this study was determined by NMR. FTIR spectroscopy was used to characterize the alginate and to observe the interactions produced by the boron adsorbed onto the beads. The maximum boron removal observed was 94 mg/g; this rate was obtained with a high initial boron concentration in an alkaline medium. A study of the isotherms established that the experimental data conform better to the Langmuir than the Freundlich isotherm model. The results obtained in the kinetic studies showed that the pseudo-second-order adsorption model is predominant and that the overall rate of boron adsorption appears to be controlled by chemisorptions

    In this work, the removal of boron by a biopolymer of alginate was studied in an aqueous solution. The effects of pH, initial boron concentration, alginate concentration in the beads and stirring time were evaluated. The ratio of mannuronic acid to guluronic acid (M/G) in the alginic acid used in this study was determined by NMR. FTIR spectroscopy was used to characterize the alginate and to observe the interactions produced by the boron adsorbed onto the beads. The maximum boron removal observed was 94 mg/g; this rate was obtained with a high initial boron concentration in an alkaline medium. A study of the isotherms established that the experimental data conform better to the Langmuir than the Freundlich isotherm model. The results obtained in the kinetic studies showed that the pseudo-second-order adsorption model is predominant and that the overall rate of boron adsorption appears to be controlled by chemisorptions.

  • Recent Advances in membrane-Based Techniques for Nuclear Waste^Processing

     Pabby, Anil Kumar; Sonawane, Jagannath V.; Sastre Requena, Ana Maria
    Date of publication: 2013-09-15
    Book chapter

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    The most comprehensive one-stop reference for analytical chemistry The highly-acclaimed Encyclopedia of Analytical Chemistry provides a much-needed professional level reference work for the 21st Century. The Encyclopedia is the most comprehensive analytical chemistry reference available, covering all aspects from theory and instrumentation through to applications and techniques. The Encyclopedia of Analytical Chemistry is the essential cross-disciplinary reference work for all analytical chemists in academia and industry. All fields of chemical research are covered: analytical, organic, physical, polymer, inorganic biomedical, environmental, pharmaceutical, industrial, petroleum, forensics, and food science.

  • State-of-the-art review on hollow fibre contactor technology and membrane-based extraction processes

     Pabby, Anil K.; Sastre Requena, Ana Maria
    Journal of membrane science
    Date of publication: 2013-03
    Journal article

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    This review will examine the most recent research and developments in hollow fibre contactor technology and membrane-based extraction processes, including the latest improvements with regard to stability and flux. The described classification attempts to cover all studies performed by means of non-dispersive contact using hydrophilic/hydrophobic microporous polymeric supports, either by impregnating the membrane or filling its pores with the bulk of the aqueous/organic solution. All membrane processes covered under these categories will be compared with improved versions in terms of performance, mass transfer modelling, stability issues, applications and the state of the art in membrane-based separation techniques. In general, an attempt will be made to review the literature published between 2005 and 2012 (August 2012) in order to focus on the real status of hollow fibre technology and membrane-based extraction processes. In a modern approach, the prospects for the use of ionic liquid (IL) as a membrane carrier for different applications with different membrane morphologies are also presented. In addition, new highly stabilised techniques developed by different researchers, such as hollow fibre renewal liquid membranes (HFRLMs) and pseudo-emulsion-based hollow fibre strip dispersion (PEHFSD), are also discussed.

  • Use of methyltrioctyl/decylammonium bis 2,4,4-(trimethylpentyl)phosphinate ionic liquid (ALiCY IL) on the boron extraction in chloride media

     Fortuny Sanroma, Agustin; Coll Ausio, Maria Teresa; Sastre Requena, Ana Maria
    Separation and purification technology
    Date of publication: 2012-09-03
    Journal article

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    Recent restriction of boron concentration in drinking water has produced some problems in the seawater desalinization plants because the rejection of boron in most of the plants is inadequate. Three ionic liquids derived from Cyanex 272 as an anion with different cations (from Aliquat 336, Cyphos IL 101 and Cyphos IL 167) were prepared to be used as boron extractants. Liquid–liquid extraction experiments were carried out to evaluate the viability of boron separation from high chloride media. The effect of ILs and boron concentration and pH were determined. Successive extractions, maintaining the organic phase, provided satisfactory results in order to implement these ILs on supported liquid membrane technologies. The use of the ionic liquid as a carrier can overcome the inconvenience associated with the membrane stability. In this sense, the ionic liquids ALiCY and the mixture of Cyphos IL 101 and Cyphos IL 167 with Cyanex 272 have been tested as liquid carrier for boron separation by using a flat sheet supported liquid membrane. The results obtained allow us to think about the application of this kind of ILs on the process intensification to remove boron from chloride solutions.

  • Procedia Engineering

     Sastre Requena, Ana Maria; Coll Ausio, Maria Teresa
    Procedia engineering
    Date of publication: 2012-09-27
    Journal article

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  • Separation of Iridium (IV), Ruthenium(III) and Rhodium(III) from Chloride Solutions

     Goralska, Elzbieta
    Defense's date: 2012-05-25
    Department of Chemical Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Studies on the extraction of Co(II) and Ni(II) from aqueous chloride solutions using Primene JMT-Cyanex272 ionic liquid extractant

     Coll Ausio, Maria Teresa; Fortuny Sanroma, Agustin; Kedari, C. S.; Sastre Requena, Ana Maria
    Hydrometallurgy
    Date of publication: 2012-08
    Journal article

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  • Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing

     Alguacil, F.J.; Garcia Diaz, I.; Lopez, F.; Sastre Requena, Ana Maria
    Separation and purification technology
    Date of publication: 2011-08-18
    Journal article

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  • N-(2-(2-Pyridyl)ethyl)chitosan (PEC) for Pd(II) and Pt(IV) sorption from HCl solutions

     Santos Sopena, L.A.; Ruiz Planas, Montserrat; Pestov, A. V.; Sastre Requena, Ana Maria; Yatluk, Y.; Guibal, Eric
    Cellulose
    Date of publication: 2011-04
    Journal article

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  • Estudi de la utilització dels mapes de potencial electrostàtic i de polarització com a descriptors moleculars  Open access

     Roset Calzada, M. Lourdes
    Defense's date: 2011-11-18
    Department of Chemical Engineering, Universitat Politècnica de Catalunya
    Theses

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    La Ingeniería molecular se basa en el conocimiento de las características estereoelectrónicas que definen el reconocimiento molecular, que es el resultado de una complementariedad, tanto geométrica como electrónica, entre diferentes entidades moleculares. La importancia de las diferentes contribuciones electrostáticas nos permite realizar un estudio teórico de predicción de la reactividad y otras propiedades moleculares a partir de cálculos de potencial electrostático y de polarización moleculares. El presente trabajo se basa en el estudio de la utilización de los mapas de potencial electrostático y de potencial de polarización como descriptores moleculares. En primer lugar se realiza un estudio del efecto de la base y de la metodología empleada en el cálculo de propiedades eléctricas de primer y segundo orden. El análisis se lleva a cabo con las moléculas de cianuro de hidrógeno, formaldehído y urea. Las bases utilizadas son del tipo doble zeta estándar, a las cuales se han añadido funciones de polarización y difusas. En particular, se han utilizado la base doble zeta 6-31G(d), les bases doble zeta aumentadas con uno o dos conjuntos de funciones de polarización : 6-31G(d,p) , 6-31G(2d,2p) y también se ha utilizado la base 6-311G++(2d,2p), que incluye funciones difusas. Los diferentes niveles de cálculo utilizan metodologías Hartree-Fock, MÆller-Plesset de segundo y cuarto orden y teoría del funcional de la densidad (DFT) : SCF, MP2, MP4, BLYP i B3LYP. Se analiza el efecto de los diferentes conjuntos de base a la contribución de la polarización a la energía de interacción, calculando para cada sistema propiedades de primer orden, como son los momentos dipolares y los momentos cuadrupolares, y propiedades de segundo orden, como la polarizabilidad y hiperpolarizabilidad moleculares. Seguidamente se evalúa el efecto de la base y el método de cálculo en la obtención de potenciales electrostáticos y de polarización moleculares. Se realiza un estudio comparativo de los mapas calculados con diferentes bases y metodologías, en concreto un estudio de la distribución espacial y un análisis de correlación entre las diferentes bases y metodologías. Un análisis de los mapas de polarización molecular a partir del cálculo de las diferencias de polarización relativas y las desviaciones estándar correspondientes nos permite un estudio comparativo de las diferentes metodologías y bases utilizadas. En particular se realiza un análisis comparativo entre diferentes métodos de cálculo con la base 6-311G++(2d,2p), tomando como referencia el cálculo MP4. Finalmente, se utilizan los mapas de potencial electrostático, de polarización y de interacción para el análisis de las características de reconocimiento molecular de un conjunto de compuestos bioactivos, a fin de analizar la importancia de la contribución de la polarización. Por este motivo, se elige para el estudio un conjunto de moléculas con una alta polarizabilidad, y en concreto, dos familias de compuestos con abundantes átomos de cloro y con una actividad tóxica definida, que forman parte de los grupos de dioxinas y furanos. Para ello se realiza el estudio de la inclusión de la polarización molecular como descriptor en la predicción de la actividad biológica de dioxinas y furanos, realizando el cálculo de potenciales electrostáticos y de polarización, un análisis de los mapas de potencial, y definiendo las principales zonas de interacción electrostática y de polarización molecular a partir de cálculos de componentes principales (PCA), así como la predicción de la actividad biológica en base a un estudio realizado mediante cálculos de mínimos cuadrados parciales (PLS).

    Molecular engineering is based on the knowledge of the stereoelectronic features that define the molecular recognition, which is the result of the complementarity of geometric and electronic features between two different molecular entities. The importance of different electrostatic contributions allows us to make a theoretical prediction of molecular properties, from calculations of electrostatic potential and molecular polarization. This work is based on the study of the use of maps of electrostatic potential and polarization potential as molecular descriptors. First there is a study of the effect of the basis set and the methodology used in the calculation of first and second order electrical properties. The analysis was carried out with the molecules of hydrogen cyanide, formaldehyde and urea. The base sets used are the standard double-zeta, to which were added polarization and diffuse functions. In particular, we have used the double zeta basis 6-31G (d), double zeta basis augmented with one or two sets of polarization functions: 6-31G (d, p), 6-31G (2d, 2p) and also used the base 6-311G + + (2d, 2p), which includes diffuse functions. The different levels of calculation methodologies used Hartree-Fock, Moller-Plesset second and fourth order and the theory of density functional (DFT): SCF, MP2, MP4, BLYP B3LYP i. We analyze the effect of different sets based on the contribution of polarization to the interaction energy, calculated for each system of first order properties, such as dipolar moments and quadrupolar moments, and second order properties such as polarizability and molecular hyperpolarizability. Further, the effect of the basis and method on the calculation of the electrostatic potential and molecular polarization potentials is evaluated. For this purpose we performed a comparative study of the maps calculated with different basis sets and methodologies, in particular a study of the spatial distribution and correlation analysis between the different data bases and methodologies was done. An analysis of molecular polarization maps by calculating the differences in polarization and relative standard deviation allows for a comparative study of different methodologies and bases used. Specifically, a comparative analysis between different methods of calculating the base 6-311G + + (2d, 2p), calculated by reference to the MP4 was done. We use maps of electrostatic, polarization and interaction potentials for the analysis of molecular recognition features of a set of bioactive compounds, to discuss the importance of the contribution of polarization. For this reason, we choose to study a set of molecules with high polarizability, specifically, two families of compounds with heavy atoms of chlorine and defined toxic activity, which are part of groups of dioxins and furans. A study of the polarization maps as indicators of biological activity of dioxins and furans, based on the best methodology is done. The inclusion of polarization as a molecular descriptor for predicting biological activity of dioxins and furans was studied from the calculation of electrostatic potentials and polarization, an analysis of the potential maps, and defining the main areas of interaction molecular electrostatic and polarization interaction from calculations of principal components (PCA) and the prediction of biological activity based on a study by calculation of partial least squares (PLS).

  • Development and implementation of separation processes of cadmium (II) from aqueous chloride solutions based on supported liquid membrane techniques

     Leopold, Agnieszka Anna
    Defense's date: 2011-07-19
    Department of Chemical Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Immobilization of cyphos ionic liquids in alginate capsules for Cd(II) sorption

     Guibal, Eric; Figuerola Piñol, A; Ruiz Planas, Montserrat; Vincent, T.; Sastre Requena, Ana Maria; Jouannin, C.
    Separation science and technology
    Date of publication: 2010-01
    Journal article

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    Four phosphonium ionic liquids (Cyphos IL-101, IL-105, IL-109, and IL-111) have been immobilized in composite biopolymer capsules (alginate/gelatin). The resins were tested for Cd(II) sorption in HCl solutions. Cyphos IL-111 being solid at room temperature, the phase change contributes to the formation of large vesicles in the resin particle. Sorption isotherms were not affected by the anionic counterpart (chloride, dicyanamide, or tetrafluoroborate), except with bistriflamide (Cd(II) was not sorbed). HCl concentration (0.1–4.6 M) did not influence the Cd(II) uptake (60 mg Cd g 1). Kinetic profiles were modeled using the intraparticle diffusion equation. Highly porous foams have been developed as an alternative to resin beads in order to improve diffusion characteristics.

  • Mathematical modeling of cadmium(II) solvent extraction from neutral and acidic chloride media using Cyanex

     Leopold, Agnieszka Ana; Coll Ausio, Maria Teresa; Fortuny Sanroma, Agustin; Rathore, Narendra Singh; Sastre Requena, Ana Maria
    Journal of hazardous materials
    Date of publication: 2010-07-29
    Journal article

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    This paper describes experimental work and the mathematical modeling of solvent extraction of cadmium( II) from neutral and acidic aqueous chloride media with a Cyanex 923 extractant in Exxol D-100. Solvent extraction experiments were carried out to analyze the influence of variations in the composition of the aqueous and organic phases on the efficiency of cadmium(II) extraction. In neutral and acidic chloride conditions, the extraction of cadmium(II) by the organophosphorous extractant Cyanex 923 (L) is based on the solvation mechanism of neutral HnCdCl(2+n) species and the formation of HnCdCl(2+n)Lq complexes in the organic phase, where n=0, 1, 2 and q = 1, 2. The mathematical model of cadmium(II) extraction was derived from the mass balances and chemical equilibria involved in the separation system. The model was computed with the Matlab software. The equilibrium parameters for metal extraction, i.e. the stability constants of the aqueous Cd–Cl complexes, the formation constants of the acidic Cd–Cl species and the metal equilibrium extraction constants, were proposed. The optimized constants were appropriate, as there was good agreement when the model was fitted to the experimental data for each of the experiments.

  • Pseudo-emulsion based hollow fibre strip dispersion (PEHFSD) technique for permeation of Cr(VI) using Cyanex-923 as carrier

     Sonawane, Jagannath V.; Pabby, Anil K.; Sastre Requena, Ana Maria
    Journal of hazardous materials
    Date of publication: 2010
    Journal article

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    Pseudo-emulsion based hollow fibre strip dispersion (PEHFSD) technique is Investigated for the permeation–separation of chromium from hydrochloric acid media. The permeation of Cr(VI) is investigated in relation to various experimental variables: hydrodynamic conditions, the concentration of Cr(VI) and HCl in the feed phase, Cyanex-923 concentration, hydrazine sulphate as the stripping agent in the pseudo-emulsion phase. The performance of the PEHFSD was analyzed and optimum conditions are suggested for chromium separation from simulated industrial waste in a hydrochloric acid media.

  • Extraction and permeation studies of Cd(II) in acidic and neutral chloride media using Cyanex 923 on supported liquid membrane

     Rathore, N S; Leopold, A; Pabby, A K; Fortuny Sanroma, Agustin; Coll Ausio, Maria Teresa; Sastre Requena, Ana Maria
    Hydrometallurgy
    Date of publication: 2009-03
    Journal article

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  • Membrane Techniques in Analytical Applications: Developments and Recent Advances

     Sastre Requena, Ana Maria; KUNDANLAL PABBY, ANILKUMAR
    Date of publication: 2009-10-05
    Book chapter

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  • DESARROLLO DE PROCESOS DE SEPARACIÓN / RECUPERACIÓN DE BORO

     Ruiz Planas, Montserrat; Fortuny Sanroma, Agustin; Coll Ausio, Maria Teresa; Sastre Requena, Ana Maria
    Participation in a competitive project

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  • PROCESSOS DE SEPARACIÓ I TRACTAMENT DE RESIDUS INDUSTRIALS (SETRI)

     Sastre Requena, Ana Maria
    Participation in a competitive project

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  • Removal of an anionic dye (Acid Blue 92) by coagulation-floculation using chitosan

     Szygula, A; Guibal, Eric; Ariño, M; Ruiz Planas, Montserrat; Sastre Requena, Ana Maria
    Journal of environmental management
    Date of publication: 2009-07
    Journal article

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  • Development of Techniques Based on Chitosan for the Removal of Azo Dyes

     SZYGULA, AGATA
    Defense's date: 2008-10-17
    Department of Chemical Engineering, Universitat Politècnica de Catalunya
    Theses

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  • HollowFiber Membrane-based Separation Technology: performance and Design Perspectives

     Sastre Requena, Ana Maria
    Date of publication: 2008-01-31
    Book chapter

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  • Recent research developments in chemical engineering vol 5

     Alguacil, F J; Alonso, M; Sastre Requena, Ana Maria; Kumar, A
    Date of publication: 2008-05-31
    Book

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  • Strip dispersión Technique: Application for Strategic and precios Metal Separation and Treatment of Wastewater Streams

     Sastre Requena, Ana Maria; Kumar, A; Sonawane, Jagannath V; Alguacil, F J
    Date of publication: 2008-01-31
    Book chapter

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  • Modelling of the solvent extraction equilibrium of cadmium(II) in neutral chloride medium using Cyanex 923

     Leopold, A A ·; Fortuny Sanroma, Agustin; Coll Ausio, Maria Teresa; Rathore, N S; Sastre Requena, Ana Maria
    10th International Chemical and Biological Engineering Conference
    Presentation of work at congresses

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  • Removal of an Anionic Reactive Dye by Chitosan and its Regeneration

     Szygula, A; Ruiz Planas, Montserrat; Guibal, Eric; Sastre Requena, Ana Maria
    2nd International Conference on WASTE MANEGEMENT, WATER POLLUTION, AIR POLLUTION, INDOR CLIMATE
    Presentation of work at congresses

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  • Paraquat sorption on calcium alginate gel beads

     Ruiz Planas, Montserrat; Barron-Zambrano, Jesus; Vicente, Rodilla; Szygula, Agata; Sastre Requena, Ana Maria
    4th WSEAS/IASME International Conference on DYNAMICAL SYSTEMS AND CONTROL
    Presentation of work at congresses

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  • Bismuth recovery from acidic solutions using Cyphos IL-101 immobilized in a composite bioplymer matrix

     Campos, K; Domingo, R; Vincent, T; Ruiz Planas, Montserrat; Sastre Requena, Ana Maria; Guibal, Eric
    Water research (Oxford)
    Date of publication: 2008-08
    Journal article

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    Impregnated resins prepared by the immobilization of an ionic liquid (IL, Cyphos IL-101, tetradecyl(trihexyl)phosphonium chloride) into a composite biopolymer matrix (made of gelatin and alginate) have been tested for recovery of Bi(III) from acidic solutions. The concentration of HCl slightly influenced Bi(III) sorption capacity. Bismuth(III) sorption capacity increased with IL content in the resin but non-linearly. Maximum sorption capacity reached 110-130mgBig(-1) in 1M HCl solutions. The mechanism involved in Bi recovery was probably an ion exchange mechanism, though it was not possible to establish the stoichiometric exchange ratio between BiCl(4)(-) and IL. Sorption kinetics were investigated through the evaluation of a series of parameters: metal concentration, sorbent dosage, type and size of sorbent particles and agitation speed. In order to reinforce the stability of the resin particles, the IL-encapsulated gels were dried; this may cause a reduction in the porosity of the resin particle and then diffusion limitations. The intraparticle diffusion coefficients were evaluated using the Crank's equation. Additionally, the pseudo-first-order and pseudo-second-order equations were systematically tested on sorption kinetics. Metal can be desorbed from loaded resins using either citric acid or KI/HCl solutions. The sorbent could be recycled for at least three sorption/desorption cycles.

  • Bismuth recovery from acidic solutions using Cyphos IL-101 immobilized in a composite biopolymer matrix

     Campos, K; Domingo, R; Vincent, T; Ruiz Planas, Montserrat; Sastre Requena, Ana Maria; Guibal, Eric
    Water research (Oxford)
    Date of publication: 2008-07
    Journal article

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  • The removal of sulphonated azo-dyes by coagulation with chitosan

     Szygula, A; Guibal, Eric; Ruiz Planas, Montserrat; Sastre Requena, Ana Maria
    Colloids and surfaces A: physicochemical and engineering aspects
    Date of publication: 2008-12
    Journal article

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  • Competitive sorption of anionic dyes on chitosan in acidic solutions

     Szygula, Agata; Guibal, Eric; Ruiz Planas, Montserrat; Sastre Requena, Ana Maria
    International journal of chemincal engineering
    Date of publication: 2008-10
    Journal article

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  • Pseudo-emulsion based hollow fibber strip dispersion (PEHFSD) techniques: Novel methodology for gold recovery from base metals in cyanide media

     Sonawane, Jagannath V.; Kumar, Dhiraj; Sastre Requena, Ana Maria
    AICHE journal
    Date of publication: 2008-01
    Journal article

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  • Pseudo-emulsion based hollow fiber strip dispersion: a novel methodology for gold recovery

     Sonawane, Jagannath V; Pabby, A K; Sastre Requena, Ana Maria
    AICHE journal
    Date of publication: 2008-02
    Journal article

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  • On cadmium (II) membrane-based extraction using Cyanex 923 as carrier

     Sastre Requena, Ana Maria; Alguacil, F J; Alonso, M; Lopez, F; Lopez-Delgado, A
    Solvent extraction and ion exchange
    Date of publication: 2008-05
    Journal article

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  • Studies on the selective separation of Ir(IV), Ru(III) and Rh(III) from chloride solutions using alamine 336 in kerosene

     Goralska, E; Coll Ausio, Maria Teresa; Fortuny Sanroma, Agustin; Kedari, C S; Sastre Requena, Ana Maria
    Solvent extraction and ion exchange
    Date of publication: 2007-01
    Journal article

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  • Solvent Extraction and Liquid Membranes: Fundamentals and Applications in New Materials

     Sastre Requena, Ana Maria; Kumar, A
    Date of publication: 2007-04-30
    Book chapter

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  • Hollow Fiber Membrane Based Separation Technology: Performance And Design Perspectives

     Sastre Requena, Ana Maria; Kumar, A
    Date of publication: 2007-04-30
    Book chapter

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  • Desrarrollo Académico de la Ingenieria Química en España:panorama 2010

     Sastre Requena, Ana Maria
    XXV Jornadas de Ingeniria Quimica. Panorama 2010
    Presentation's date: 2007-09-12
    Presentation of work at congresses

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  • Desarrollo Académico de la Ingenieria Quimica en España.Panorama 2010

     Sastre Requena, Ana Maria
    XXV Jornadas de Ingenieria Química
    Presentation's date: 2007-09-12
    Presentation of work at congresses

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  • Estudio Comparativo de la Adsorción del Paraquat con Diferentes Adsorbentes

     Sastre Requena, Ana Maria
    XVII Congreso Español de Toxicología
    Presentation's date: 2007-09-26
    Presentation of work at congresses

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  • Eliminación de los Colorantes Azoicos de las Aguas Residuales Industriales Utilizando el Biopolímero Quitosan

     Sastre Requena, Ana Maria
    XVII Congreso Español de Toxicología
    Presentation's date: 2007-09-26
    Presentation of work at congresses

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  • Extraction and Permeation studies of Cd(II) using Cyanex 923

     Rathore, N S; Leopold, A; Fortuny Sanroma, Agustin; Coll Ausio, Maria Teresa; Pabby, A K; Sastre Requena, Ana Maria
    10th International Conference on Environmental Science and Tecnology
    Presentation of work at congresses

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  • Selective extraction of palladium(II) from hydrochloric acid solutions with pyridinecarboxamides and ACORGA CLX 50

     Regel Rosocka, Magdalena; Wisniewski, M; Borowiak, A; Cieszynska, A; Sastre Requena, Ana Maria
    Separation and purification technology
    Date of publication: 2007-01
    Journal article

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  • Au(I) extraction by LIX-79/n-heptane using pseudo-emulsion-based hollow fiber strip dispersion (PEHFSD) technique

     Sonawane, Jagannath V.; Kumar, A; Sastre Requena, Ana Maria
    Journal of membrane science
    Date of publication: 2007-08
    Journal article

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