Gutierrez Bouzan, Maria Carmen
Total activity: 287
Research group
ENMA - Environmental Engeering
INNOTEX CENTER
Institute
Institute of Textile Research and Indust. Coop. of Terrassa
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gutierrezintexter.upc.edu
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Scientific and technological production
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1 to 50 of 287 results
  • Selection of decolorization methods of reactive dye baths for reuse purposes

     Lopez Grimau, Victor; Gutierrez Bouzan, Maria Carmen
    Date of publication: 2014
    Book chapter

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  • New trends in textile wastewater treatments

     Gutierrez Bouzan, Maria Carmen; Lopez Grimau, Victor; Vilaseca Vallve, M. Mercedes
    Date of publication: 2014
    Book chapter

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    Water scarcity has become an issue worldwide due to various such as rapid population growth and booming industrialization. With growing demand of water resources, the traditional methods of wastewater treatment should be improved to supply a better quality of effluents. The stringent environmental standards imposed by many countries in response to the increase of water consumption are also an important challenge to be faced in the wastewater treatment. Since many years, industrials working in the field of the wet textile processing have implemented different treatments for the wastewater purification. The simplest way to improve the effluents quality is the application of a physic-chemical treatment which can achieve the full color removal, although the organic matter removal is insufficient to accomplish the current regulations. The biological treatment with activated sludge provides a high efficiency of organic matter removal, whereas water decoloration is in general insufficient. In this case, a tertiary treatment to remove color is required. In the recent years, there has been an increasing tendency towards the application of membrane treatments for the removal of organic pollutants in wastewater. In particular, the combination of membrane technology and activated sludge biological plants is nowadays an attractive option for the textile wastewater treatment which enables the reuse of the treated effluents. This chapter includes an overview of the main technologies for the textile wastewater treatment, from the conventional physic-chemical and biological treatment to the more recent membrane bioreactors. Their efficiency and feasibility are discussed as well as the possibility of reuse

  • Electrochemical treatment of industrial wastewater and effluent reuse at laboratory and semi-industrial scale

     Sala Gastón, Mireia; Gutierrez Bouzan, Maria Carmen
    Journal of cleaner production
    Date of publication: 2014-02-15
    Journal article

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    This study is based on the electrochemical decolouration of exhausted dyeing effluents which contain dyes and salts. The treated effluents were reconstituted and reused in a new dyeing process. Initially, synthetic effluents containing one of the reactive dyes Novacron Yellow, Ruby and Deepnight were treated in the laboratory pilot. In all cases, the dye decolouration follows a pseudo-first order reaction. Subsequently, seven industrial effluents which contain mixtures of these dyes were collected in a Spanish mill and treated in the laboratory pilot. Two methods for the electrochemical treatment and further effluent reconstitution and reuse were studied. The first method consisted of an electrochemical treatment followed by an acidification and a stripping step to remove the carbonate ions. In the second method, the acidification was carried out before the electrochemical treatment; subsequently, the generated CO 2 was removed during the decolouration process. Finally, the optimised process was applied in situ in a Spanish mill by means of a semi-industrial pilot plant (400 L). No significant colour differences were appreciated between reference dyeings and the fabrics dyed with the treated exhausted effluents. The reuse of the dyeing effluent achieves the reduction of 70% process water consumption and 60% salt discharge.

  • Determination of indigo dye for its automation during the recovery by membrane process

     Buscio Olivera, Valentina; Gutierrez Bouzan, Maria Carmen; Crespi Rosell, Martin
    IWA Conference on Instrumentation Control and Automation
    Presentation's date: 2013-09-18
    Presentation of work at congresses

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    The textile industry generates a large amount of wastewater characterized by its strong colour due to the residual dyes. The colour cannot be removed by conventional wastewater treatments. The membrane technology is a good alternative to treat these effluents because it allows the recovery of both water and dyes. Nowadays, the indigo dye is one of the most popular textile dyes. It is used in the denim industry. Indigo is insoluble in aqueous solutions, thus it is easily recovered by membrane filtration. In a membrane process is important to know the concentration of indigo dye. The installation of an automatic titration provides a fast and simple method for the process control. In this study, a titration method was validated to control the amount of indigo recovered from the textile effluents. The indigo dye is determined in its leuco form (or reduced soluble form) by redox titration with potassium hexacyanoferrate. This method presents a good reproducibility and repeatability. It is also able to be adapted to the industrial processes. The automatic titrator has been used so far for the determination of the several wastewater parameters. In this work, the statistical study has also shown its suitability for the automatic control of indigo and hydrosulphite in industrial effluents. The same statistical study can be applied to other chemicals to validate a particular method

  • Nuevas tecnologías para la recuperación de colorantes y reutilitzación de efluentes

     Buscio Olivera, Valentina; Gutierrez Bouzan, Maria Carmen; Vilaseca Vallve, M. Mercedes; Crespi Rosell, Martin
    Jornada de la Recerca i la Innovació Tecnològica al Campus de la UPC a Terrassa
    Presentation's date: 2013-06-13
    Presentation of work at congresses

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  • Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment

     Lopez Grimau, Victor; Riera Torres, Miquel Antoni; López Mesas, Montserrat; Gutierrez Bouzan, Maria Carmen
    Coloration technology
    Date of publication: 2013-03-17
    Journal article

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    he presence of aromatic amines in effluent from dyeing processes of the textile industry is an added problem to the high coloration typical of this type of effluent. The main objective of the present work was to eliminate these two problems simultaneously by electrochemical treatment using bath solutions containing three azo dyes. For the analysis of amines, a liquid¿liquid extraction method was developed as an easier and faster alternative to the method described in the standards and widely used in analytical laboratories. Four amines (aniline, o-toluidine, 4-chloroaniline and 4-aminobiphenyl) were detected by GC-MS in the residual azo dye baths. A total amine concentration of between 2.5 and 1 ppm was detected, 4-aminobiphenyl being the main compound. Both residual colour and amines were removed by electrochemical treatment carried out at three current densities (3, 24 and 40 mA/cm2). At 24 mA/cm2, more than 90% of colour removal was achieved, and the total amine concentration was reduced to below 0.15 ppm.

    The presence of aromatic amines in effluent from dyeing processes of the textile industry is an added problem to the high coloration typical of this type of effluent. The main objective of the present work was to eliminate these two problems simultaneously by electrochemical treatment using bath solutions containing three azo dyes. For the analysis of amines, a liquid–liquid extraction method was developed as an easier and faster alternative to the method described in the standards and widely used in analytical laboratories. Four amines (aniline, o-toluidine, 4-chloroaniline and 4-aminobiphenyl) were detected by GC-MS in the residual azo dye baths. A total amine concentration of between 2.5 and 1 ppm was detected, 4-aminobiphenyl being the main compound. Both residual colour and amines were removed by electrochemical treatment carried out at three current densities (3, 24 and 40 mA/cm2). At 24 mA/cm2, more than 90% of colour removal was achieved, and the total amine concentration was reduced to below 0.15 ppm.

  • Continuous reuse of water and electrolyte from decolorized reactive dyebaths

     Lopez Grimau, Victor; Gutierrez Bouzan, Maria Carmen; Valldeperas Morell, Jose; Crespi Rosell, Martin
    Desalination and water treatment
    Date of publication: 2013-03-04
    Journal article

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    In this work, the feasibility of reusing water and salt from reactive dyebaths after electrochemical decolourization was evaluated. Dyeing series of ten reuses with three reactive dyes (Navy Blue Procion H-EXL, Crimson Procion H-EXL and Yellow Procion H-EXL) were carried out (individually and in a trichromie) and color differences and total organic carbon values were measured to study how the successive reuses affect the quality dyeing. The first reuse produced dyeings with low colour differences with respect to a standard dyeing. In the subsequent reuses, colour differences increased until they reached a constant value at the 4th or 5th reuse, following a similar behavior to the organic matter content. At this point, it is determined the percentage of dye increase that allows for continuous dyeing of acceptable quality for the textile industry. To obtain dyeings with acceptable color differences (DE ⁄ CMC (2:1) 6 1) independent of the number of consecutive reuses, a 30% increase in blue dyestuff and 10% for red dyestuff must be added, whereas in the case of yellow dyeing, it was not necessary to increase the dye amount after subsequent reuses. In each dyeing, this process allowed savings of 70% of water and an average of 60% for salt.

  • TRATAMIENTO ELECTROQUIMICO DE COLORANTES Y REUTILIZACION DE EFLUENTES INDUSTRIALES

     Gutierrez Bouzan, Maria Carmen
    Participation in a competitive project

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  • Tractament d'efluents insdustrials mitjançant tècniques de membranes

     Gutierrez Bouzan, Maria Carmen
    Participation in a competitive project

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  • Photocatalysis with titanium dioxide to remove colour of exhausted reactive dyebaths without pH modification

     Visa Calvis, Teresa; Sanchez Jimenez, Margarita; Lopez Grimau, Victor; Navarro, Raquel; Reche, Saray; Gutierrez Bouzan, Maria Carmen
    Desalination and water treatment
    Date of publication: 2012-05-16
    Journal article

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  • Electrochemical decolourisation of cotton dye baths for reuse purposes: a way to reduce salinity of the textile wastewater

     Lopez Grimau, Victor; Gutierrez Bouzan, Maria Carmen; Sala Gastón, Mireia; Crespi Rosell, Martin
    Desalination and water treatment
    Date of publication: 2012-08-07
    Journal article

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    Electrochemical techniques offer many advantages for the treatment of industrial effluents. These processes are clean, operate at room temperature, and in most cases, do not need the addition of reagents (as in the case of reactive dyeing effluents). In particular, the electrochemical treatment of textile effluents is an efficient method to remove colour. In this work, diverse synthetic effluents containing reactive dyes were treated in an electrochemical cell with Ti/PtO x electrodes. The efficiency of the process to remove colour and the use of an additional UV irradiation were evaluated. Once the conditions were established in synthetic effluents, they were applied on two types of exhausted reactive dye baths collected from a cotton mill. Instead of the effluent discharge, another possibility is to reuse the decoloured effluents for a new dyeing process. In this sense, diverse experiments were carried out and conditions for the effluents reuse were established. The reuse of dyeing effluents implies an important reduction of the salt and water consumption as well as a reduction of the salinity of the discharged effluents.

  • Influence of cell design and electrode materials on the decolouration of dyeing effluents

     Sala Gastón, Mireia; Del Río, A.I.; Molina, Javier; Cases Iborra, Francisco Javier; Gutierrez Bouzan, Maria Carmen
    International Journal of Electrochemical Science
    Date of publication: 2012
    Journal article

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    Electrochemical techniques are applied in different textile processes, including wastewater treatment, as they are clean and generally operate at room temperature. In the current work, doped SnO2 electrodes (Ti/SnO2-Sb-Pt) were prepared. They were used as anodes in two electrochemical cells (simple batch mode and batch recirculation mode) to achieve the removal of two reactive azo dyes (Remazol Black 133B and Procion Yellow H-EXL) in synthetic dyeing effluents. With these electrodes, both cells exhibit similar decolouration rates. In addition, the doped SnO2 electrodes are compared with Ti/Pt electrodes in order to establish the influence of electrode material. They were applied to the treatment of four synthetic effluents containing one of the following reactive azo dyes: Remazol Black 133B, Procion Yellow H-EXL, Procion Crimson H-EXL and Procion Navy H-EXL. It was stated that the decolouration is faster with Ti/Pt anodes than with the doped SnO2 ones, but these last electrodes generate lower amount of chloroform during the electrolysis

    Electrochemical techniques are applied in different textile processes, including wastewater treatment, as they are clean and generally operate at room temperature. In the current work, doped SnO2 electrodes (Ti/SnO2-Sb-Pt) were prepared. They were used as anodes in two electrochemical cells (simple batch mode and batch recirculation mode) to achieve the removal of two reactive azo dyes (Remazol Black 133B and Procion Yellow H-EXL) in synthetic dyeing effluents. With these electrodes, both cells exhibit similar decolouration rates. In addition, the doped SnO2 electrodes are compared with Ti/Pt electrodes in order to establish the influence of electrode material. They were applied to the treatment of four synthetic effluents containing one of the following reactive azo dyes: Remazol Black 133B, Procion Yellow H-EXL, Procion Crimson H-EXL and Procion Navy H-EXL. It was stated that the decolouration is faster with Ti/Pt anodes than with the doped SnO2 ones, but these last electrodes generate lower amount of chloroform during the electrolysis

  • Aplicació de Tècniques Electroquímiques i Fotoelectroquímiques per la Degradació de Compostos Poc Biodegradables en Efluents Industrials Tèxtils  Open access

     Sala Gastón, Mireia
    Defense's date: 2012-07-19
    Department of Textile and Paper Engineering, Universitat Politècnica de Catalunya
    Theses

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    Industrial effluents and their further reuse have shown an increasing interest. The current PhD Thesis is based on obtaining a new system for the treatment of textile effluents. The aim of this study is to remove colour and to degrade the hydrolysed reactive dyes as well as to achieve an effluent able to be reused in a new dyeing process. A total of 10 reactive dyes with different constitution are studied: chromophore group (azo and phtalocyanine), reactive group (chlorotriazine and vinilsulphone) and number of reactive groups (mono, bi and trireactive). Their behaviour respect to the decolouration and degradation is evaluated with several combinations of electrochemistry (EC) and ultraviolet irradiation (UV): EC alone, EC treatment with simultaneous UV (UVEC) and finally EC treatment with further UV (EC+UV). The electrochemical and photoelectrochemical treatment have demonstrated to be an efficient method in all the studied cases, achieving decolourations higher than 90%. All the studied dyes have similar behaviour except for the phtalocyanine which has lower kinetic decolourations rates than the azo group dyes. According to the different treatments studied, the optimised method is the one which starts with the EC treatment until 80% decolouration, followed by the UV irradiation in order to degrade the organohalogenated compounds generated during the electrolysis, which concentration is lower than 1ppm in all cases. In addition, different intensities are also studied (2A, 5A and 10A). The treatment performed at 10A is the most efficient due to the high rate of oxidants generation which enhances the dyes degradation. Different combinations of alkalis and electrolytes (NaOH with Na2SO4, and Na2CO3 with NaCl) are evaluated. In all the studied cases, high decolouration rates are obtained and the reuse is feasible when the residual alkali is removed before starting the new dyeing. Also, two kinds of anodes are studied (Ti/Pt and Ti/SnO2-Sb-Pt). In the presence of chloride, the first ones are the most efficient in effluents decolouration, showing kinetic rates around 4.5 times higher than the obtained with the second ones. However, in despite of a certain instability of Ti/SnO2-Sb-Pt anodes, they generate 2 to 7 times lower amounts of organic volatile compounds than the Ti/Pt anodes. On the other hand, different cell designs are used (¿Simple Batch Cell¿, ¿Recirculation Batch Cell¿ and the semi-industrial design). The two first ones, which only difference is the stirring mode, produce similar effluents decolouration. In addition, the results obtained with the semi-industrial pilot are in accordance with the laboratory designs. As a final part of the Thesis, different industrial baths which contain reactive dyes are treated. By one hand, the exhausted dyeing effluents and by the other hand the first washing effluents which contain surfactants. The main goal is to know the influence of the surfactant in the effluents decolouration.¿¿ The presence of the surfactant does not avoid the dyes degradation, although its decolouration kinetic rates decreased due to the higher degradable character of the surfactant.

    Actualment, el consum d’aigua destinat a l’ús industrial és molt elevat. Tenint en compte l’escassetat de l’aigua i la seva contaminació, augmenta cada cop més l’interès en desenvolupar nous mètodes destinats al tractament d’efluents industrials que permetin la seva reutilització. La present Tesi Doctoral està basada en l’obtenció d’un nou sistema de tractament d’efluents tèxtils que permet decolorar i degradar els colorants reactius hidrolitzats, a més d’aconseguir un efluent tractat capaç de ser reutilitzat en un nou procés de tintura. S’han estudiat un total de 10 colorants reactius amb diferent constitució, tant respecte als grups cromòfors (azo i ftalocianina), com al tipus de grup reactiu (clorotriazina i vinilsulfona) o al nombre de grups reactius (mono, bi i trifuncionals). S’ha avaluat el comportament, en front la decoloració i la degradació, d’aquest tipus de colorants amb varies combinacions d’electroquímica (EC) i radiació ultraviolada (UV): tractament EC únicament, tractament EC simultani al UV (UVEC), i finalment tractament EC amb posterior radiació UV (EC+UV). L’aplicació dels tractaments electroquímic i fotoelectroquímic ha demostrat ser eficient en tots els casos, obtenint decoloracions superiors al 90%. Tots els colorants es comporten de manera similar, excepte els que contenen el grup cromòfor ftalocianina que mostra cinètiques de decoloració inferiors a les del grup cromòfor azo. Dels diferents tractaments assajats, el mètode òptim és el que s’inicia amb el tractament EC fins assolir un 80% de decoloració i a partir d’aquest punt, s’aplica la radiació UV per tal d’eliminar els compostos organohalogenats generats durant el tractament electroquímic en concentracions inferiors a 1ppm. També s’ha estudiat la influencia de la intensitat de treball (2A, 5A i 10A). La intensitat de 10A esdevé la més eficient, ja que genera més compostos oxidants que afavoreixen la degradació dels colorants. S’ha avaluat l’efecte de diferents combinacions d‘àlcali i d’electròlit (NaOH amb Na2SO4, i Na2CO3 amb NaCl). En tots els casos s’han obtingut elevades decoloracions i la reutilització és factible sempre i quan s’elimini tot l’àlcali residual abans de procedir a la nova tintura amb l’efluent tractat. A més, s’han estudiat dos tipus d’ànodes (Ti/Pt i Ti/SnO2-Sb-Pt). En presència de clorurs, els primers són els més eficients en la decoloració dels efluents, donant constants cinètiques de l’ordre de 4.5 vegades superiors. Els segons, encara que pateixen una certa inestabilitat, són els que generen menors quantitats de compostos orgànics volàtils, disminuint la seva concentració entre 2-7 vegades. D’altra banda, s’han emprat diferents dissenys de cel·les electroquímiques (“Simple Batch Cell”, “Recirculation Batch Cell” i la cel·la de disseny semi-industrial). Les dos primeres, que es diferencien en el sistema d’agitació, mostren decoloracions similars. A més, amb la cel·la de disseny semi-industrial s’obtenen resultats concordants amb els dissenys de laboratori.

    Actualmente, el consumo de agua destinado al uso industrial es muy elevado. Teniendo en cuenta la escasez del agua y su contaminación, está aumentando cada vez más el interés por desarrollar nuevos métodos destinados al tratamiento de efluentes industriales que permitan a la vez la reutilización del agua. La presente Tesis Doctoral se basa en la obtención de un nuevo sistema de tratamiento de efluentes textiles que permite decolorar y degradar los colorantes reactivos hidrolizados, además de conseguir un efluente capaz de ser reutilizado en un nuevo proceso de tintura. Se han estudiado un total de 10 colorantes reactivos de diferente constitución, tanto en lo que respecta a los grupos cromóforos (azo y ftalocianina), como al tipo de grupo reactivo (clorotriazina y vinilsulfona) o al número de grupos reactivos (mono, bi y trifuncionales). Se ha evaluado el comportamiento de este tipo de colorantes respecto a la decoloración y la degradación mediante diferentes combinaciones de electroquímica (EC) y radiación ultravioleta (UV): tratamiento EC únicamente, tratamiento EC simultáneo al UV (UVEC) y finalmente, tratamiento EC con posterior radiación UV (EC+UV). La aplicación del tratamiento electroquímico y fotoelectroquímico ha demostrado ser eficiente en todos los casos, obteniéndose decoloraciones superiores al 90%. Todos los colorantes se comportan de manera similar, a excepción de los que contienen el grupo cromóforo ftalocianina cuyas constantes cinéticas de decoloración son inferiores a las del grupo cromóforo azo. Respecto a los diferentes tratamientos ensayados, el método óptimo es el que se inicia con el tratamiento EC hasta llegar al 80% de decoloración, punto a partir del cual se aplica la radiación UV a fin de eliminar los compuestos organoclorados generados durante el tratamiento electroquímico en concentraciones inferiores a 1ppm. También se ha estudiado la influencia de la intensidad de trabajo (2A, 5A y 10A). La intensidad de 10A es la más eficiente, ya que se generan proporcionalmente más compuestos oxidantes que favorecen la degradación de los colorantes. Se ha evaluado el efecto de diferentes combinaciones de álcali y electrolito (NaOH con Na2SO4 y Na2CO3 con NaCl). En todos los casos se han obtenido elevadas decoloraciones y la reutilización es factible siempre que se elimine todo el álcali residual antes de proceder a una nueva tintura con el efluente tratado. Además, se han estudiado dos tipos de ánodos (Ti/Pt y Ti/SnO2-Sb- Pt). En presencia de cloruros, los primeros son los más eficientes respeto a la decoloración de los efluentes, dando constantes cinéticas del orden de 4.5 veces superiores. Los segundos, aunque sufren una cierta inestabilidad, son los que generan menores cantidades de compuestos orgánicos volátiles, disminuyendo su concentración entre 2-7 veces. Por otra parte, se han utilizado distintos diseños de celdas electroquímicas (“Simple Batch Cell”, “Recirculation Batch Cell” y la celda de diseño semi-industrial). Las dos primeras, que se diferencian en el modo de agitación, muestran decoloraciones similares. Además, con la celda semi-industrial se obtienen resultados concordantes con los obtenidos mediante los diseños de laboratorio.

  • Determinar la causa de la rotura del tejido

     Carrillo Navarrete, Fernando; Cayuela Marin, Diana; Gutierrez Bouzan, Maria Carmen
    Date: 2012-06-04
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  • Grado de blanco tanto base, como óptico. Resistencia a la tracción

     Cayuela Marin, Diana; Tornero Garcia, Jose Antonio; Carrillo Navarrete, Fernando; Gutierrez Bouzan, Maria Carmen
    Date: 2012-02-17
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  • Grado de blanco base como óptico. Resistencia a la tracción

     Cayuela Marin, Diana; Tornero Garcia, Jose Antonio; Carrillo Navarrete, Fernando; Gutierrez Bouzan, Maria Carmen
    Date: 2012-02-09
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  • Grado de blanco tanto base, como óptico. Resistencia a la tracción en seco y en mojado

     Cayuela Marin, Diana; Tornero Garcia, Jose Antonio; Carrillo Navarrete, Fernando; Gutierrez Bouzan, Maria Carmen
    Date: 2012-07-23
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  • Determinar diversos parámetros de una muestra

     Gutierrez Bouzan, Maria Carmen
    Date: 2012-07-05
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  • Alcalinidad, cloro, tensioactivos aniónicos, pH, agua oxigenada

     Cayuela Marin, Diana; Gutierrez Bouzan, Maria Carmen
    Date: 2012-07-25
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  • Comparación de las dos muestras por microscopía

     Cayuela Marin, Diana; Gutierrez Bouzan, Maria Carmen
    Date: 2012-04-19
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  • Grado de blanco tanto base, como óptico, resistencia a la tracción

     Cayuela Marin, Diana; Tornero Garcia, Jose Antonio; Carrillo Navarrete, Fernando; Gutierrez Bouzan, Maria Carmen
    Date: 2012-03-19
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  • Grado de blanco tanto base, como óptico. Resistencia a la tracción en seco y en mojado

     Cayuela Marin, Diana; Tornero Garcia, Jose Antonio; Carrillo Navarrete, Fernando; Gutierrez Bouzan, Maria Carmen
    Date: 2012-07-11
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  • Free and releasable formaldehyde content

     Gutierrez Bouzan, Maria Carmen
    Date: 2012-10-05
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  • Determinar incrustación inorgánica

     Gutierrez Bouzan, Maria Carmen
    Date: 2012-10-05
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  • Determinar incrustación inorgánica

     Gutierrez Bouzan, Maria Carmen
    Date: 2012-10-05
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  • Determinación manganeso

     Gutierrez Bouzan, Maria Carmen; Riva Juan, Maria Carmen
    Date: 2012-07-27
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  • Informe técnico sobre la bondad del proceso de lavado

     Carrillo Navarrete, Fernando; Cayuela Marin, Diana; Gutierrez Bouzan, Maria Carmen; Tornero Garcia, Jose Antonio
    Date: 2012-06-13
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  • Determinación de aminas aromáticas

     Gutierrez Bouzan, Maria Carmen
    Date: 2012-04-25
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  • Determinación de incrustaciones inorgánicas

     Gutierrez Bouzan, Maria Carmen
    Date: 2012-11-12
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  • Optimisation of the electrochemical and UV combined treatment to remove colour and organic halogenated compounds of textile effluents

     Riera Torres, Miquel Antoni; Gutierrez Bouzan, Maria Carmen
    Separation and purification technology
    Date of publication: 2012-09-19
    Journal article

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    Different electrochemical oxidation and UV irradiation treatment conditions were studied to improve the removal of colour and organic halogenated compounds of textile effluents wastewater so as to minimize their environmental impact. Synthetic dyeing effluents containing a reactive dye (CI Reactive Black 5, Procion Crimson H-EXL, Procion Navy H-EXL, Procion Yellow H-EXL and Procion Blue H-EXL) and Na2SO4 as dyeing electrolyte were studied. Ti/Pt oxides electrodes at different current densities (3, 6,12,24 and 40 mA/cm2) and three UV irradiation lamps (6 and 9W; 254, 360 and 365 nm maximum emission) were used. Results showed that total colour and organic halogenated compounds removal were achieved by UV irradiation after electrochemical treatment. A clear influence of current density and the type of UV lamp on colour removal was found, being the submerged lamps into the dye solution the most efficient. Kinetic constants of the UV irradiation step were calculated

  • Access to the full text
    Electrochemical techniques in textile processes and wastewater treatment  Open access

     Sala Gastón, Mireia; Gutierrez Bouzan, Maria Carmen
    International journal of photoenergy
    Date of publication: 2012
    Journal article

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    The textile industry uses the electrochemical techniques both in textile processes (such as manufacturing fibers, dyeing processes, and decolorizing fabrics) and in wastewaters treatments (color removal). Electrochemical reduction reactions are mostly used in sulfur and vat dyeing, but in some cases, they are applied to effluents discoloration. However, the main applications of electrochemical treatments in the textile sector are based on oxidation reactions. Most of electrochemical oxidation processes involve indirect reactions which imply the generation of hypochlorite or hydroxyl radical in situ. These electrogenerated species are able to bleach indigo-dyed denim fabrics and to degrade dyes in wastewater in order to achieve the effluent color removal. The aim of this paper is to review the electrochemical techniques applied to textile industry. In particular, they are an efficient method to remove color of textile effluents. The reuse of the discolored effluent is possible, which implies an important saving of salt and water (i.e., by means of the “UVEC Cell”)

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     Lopez Grimau, Victor; Gutierrez Bouzan, Maria Carmen; Valldeperas Morell, Jose; Crespi Rosell, Martin
    Coloration technology
    Date of publication: 2012-02-01
    Journal article

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     Pepio Viñals, Montserrat; Gutierrez Bouzan, Maria Carmen
    Industrial & engineering chemistry research
    Date of publication: 2011-08
    Journal article

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     Gutierrez Bouzan, Maria Carmen; Lopez Grimau, Victor; Crespi Rosell, Martin; Valldeperas Morell, Jose
    Revista de química e industria textil
    Date of publication: 2011-01-01
    Journal article

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     Cayuela Marin, Diana; Tornero Garcia, Jose Antonio; Gutierrez Bouzan, Maria Carmen; Prieto Fuentes, M. Remedios
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    Date: 2011-10-27
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