Font Vallès, Joaquim
Total activity: 80
Research group
AMCH - Analysi of materials in Cultural Heritage
School
Escola d'Enginyeria d'Igualada
E-mail
joaquim.font-valleseei.upc.edu
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Scientific and technological production
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1 to 50 of 80 results
  • Characterization of the volatile organic compounds by hs-spme-cg-ms in the leather sector

     Cuadros Domènech, Rosa Maria; Olle Otero, Luis; Bacardit Dalmases, Anna; Font Vallès, Joaquim
    Journal of the American Leather Chemists Association
    Vol. 108, num. 11, p. 420-427
    Date of publication: 2013-11
    Journal article

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  • Alternative Fungicides for the Leather Industry: Application in Various Processes.

     Cuadros Domènech, Sara; Manresa Presas, Mª Angels; Font Vallès, Joaquim; Puig Vidal, Rita; Marsal Monge, Agustí
    Journal of the Society of Leather Technologists and Chemists
    Vol. 96, p. 225-233
    Date of publication: 2013
    Journal article

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    Increasingly stringent environmental legislation and indispensable use of fungicides in the tanning industry obliges tanners to adapt their processes to alternative technologies with lower environmental impact, including the search for new fungicide systems that comply with those rules. The fungicidal capacities of alternative compounds diiodomethyl p-tolylsulfone (DIMPTS), 3-iodo- 2-propynyl N-butylcarbamate (IPBC) and thiabendazole / 2-thiazol-4-yl-1H-benzo imidazole(TBZ) were compared to those of conventional fungicides, 2-(thiocyanomethylthio)-1,3-benzothiazole (TCMTB)and the mixture of phenolic compounds). This fungicidal capacity was evaluated against different strains of fungi in different processes. Fungicides were applied in the chrome tanning process, fatliquoring of hides tanned with vegetable extracts and a preservative pickling process. Further studies consisted of a microbiological control samples inoculated with fungi common in tannery, determination of the fungicide content on the skin, and a toxicity study of process wastewater. The results obtained in an earlier work and the higher antifungal capacity of DIMPTS and IPBC in the different processes, supported the possibility of using them in the leather sector. The skins produced using alternative fungicides showed no stains or other defects, and in relation to the environmental impact, toxicity from wastewater was lower in the case of the alternative products against those commonly used

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    Determination of fungicides in residual tanning floats using solid phase micro extraction  Open access

     Font Vallès, Joaquim; Reyes Reyes, Maria; Cuadros, Sara; Bacardit Dalmases, Anna; Olle Otero, Luis; Marsal Monge, Agustín
    Journal of the American Leather Chemists Association
    Vol. 108, num. 2, p. 41-47
    Date of publication: 2013-02-04
    Journal article

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    Solid-phase microextraction (SPME) was optimized for extraction of the leather preservative agents 2-(thiocyanomethylthio)-benzothiazole (TCMTB), 4-chloro-3-methylphenol (PCMC), 2-phenylphenol (OPP), 2-Octyl-3(2H)-isothiazolone (OIT), 2-mercaptobenzothiazol (MBT) and 3-iodo-2-propynyl-butylcarbamate (IPBC) in spent tanning floats. Determination was carried out by high performance liquid chromatography (HPLC) with photo diode array detection (PDA). The following parameters were studied to achieve the maximum efficiency in extraction: fiber type, adsorption conditions (extraction time, ionic strength, temperature) and desorption parameters (time, temperature and composition of the desorption solvent). Results indicate that SPME using a 60um polydimethylsiloxane/divinylbenzene (PDMS/DVB) fiber is appropriate for the extraction of these types of compounds. Recoveries ranged from 82% to 116% with RSDs between +-8% and +-12% and limits of detection below 1 mg/L except for IPBC. The optimized procedure was successfully applied for the determination of leather preservatives in eleven residual tanning floats taken from different companies. This method enables us to determine quantitatively the fungicides contained in th residual floats. Consequently, it will constitute a very useful tool to improve the preservative uptake in leather manufacturing processes

  • Study of the effect of temperature, relative humidity and UV radiation on chrome-tanned leather ageing

     Bacardit Dalmases, Anna; Jorba, Montse; Font Vallès, Joaquim; Olle Otero, Luis
    Journal of the American Leather Chemists Association
    Vol. 107, num. 6, p. 179-185
    Date of publication: 2012-06-01
    Journal article

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    Since leather is strongly affected by three main environmental parameters: temperature, relative humidity and UV radiation, this piece of research focuses on the effect that these three factors have on chrome-tanned leather ageing. Chrome tanned leathers were exposed to weathering effects in a climatic chamber in order to identify the most important variables affecting this weathering process and also to check for any possible interactions. Both a multilevel centralized factorial experimental design and an analysis of variance (ANOVA) were used as statistical tools for estimating the effects of the parameters

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    Use of water-based carbonyl-functional polymers on a cross-linker-free high performance leather finishing  Open access

     Olle Otero, Luis; Urteaga, Eva; Font Vallès, Joaquim; Labastida, Luis; Bacardit Dalmases, Anna
    Afinidad: revista de química teórica y aplicada
    Vol. LXVIII, num. 551, p. 15-19
    Date of publication: 2012-01-01
    Journal article

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    The present paper aims to study a new high-performance coating formulation while avoiding the use of cross-linkers. By using acrylic polymers with carbonyl functional groups, the negative environmental effects of the finishing process can be minimized. These new polymers can give very good physical properties without losing the inherent properties of flexibility and elasticity needed in upholstery leather

  • Comparison of weathering variables on chrome-tanned and wet-white leather ageing

     Olle Otero, Luis; Jorba, Montse; Castell, Joan Carles; Font Vallès, Joaquim; Bacardit Dalmases, Anna
    Journal of the Society of Leather Technologists and Chemists
    Vol. 96, num. 1, p. 11-15
    Date of publication: 2012-02-08
    Journal article

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    Leather is a natural material that can be used in different environments and often under aggressive environmental conditions that may cause premature ageing. The most important factors influencing the degradation of leather are temperature, relative humidity and UV radiation. Leathers with chrome tannage and wet-white leathers were exposed to weathering effects using a climatic chamber in order to identify the most important variables affecting this weathering process and to check for interactions. Both a multilevel centralized factorial experimental design and an analysis of variance (ANOVA) have been employed as statistical tools for estimating the effects of the parameters

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    Determinación de TCMTB y otros fungicidas en piel  Open access

     Reyes Farrera, María R.; Font Vallès, Joaquim; Bacardit Dalmases, Anna; Marsal Monge, Agustín
    Congreso Asociación Química Española de la Industria del Cuero
    p. 24-43
    Presentation's date: 2012-05-17
    Presentation of work at congresses

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    La norma ISO 13365:2011 desarrolla un método analítico para la determinación del contenido de los agentes conservantes 2-(tiocianometiltio)-benzotiazol (TCMTB), 4-cloro-3-metilfenol (PCMC), 2-fenilfenol (OPP) y 2-octil-3(2H)-isotiazolona (OIT) en cuero por cromatografía líquida. La determinación simultanea de los fungicidas TCMTB, PCMC, OPP, OIT, y también de 2-mercaptobenzothiazol (MBT) y 3-yodo-2-propinil-butilo (IPBC) en muestras de piel se llevó a cabo mediante cromatografía líquida (HPLC) con detector ultravioleta de fotodiodos (PDA). La preparación de la muestra y el proceso de extracción se realizaron siguiendo la norma ISO 13365. La fase móvil consistió en agua con un 0.1% de ácido fórmico (A) y acetonitrilo con un 0.1% de ácido fórmico (B). En la detección cromatográfica se introdujo un pequeño cambio en relación con la norma. Se utilizó un detector de fotodiodos en lugar de un detector de longitud de onda fija para mejorar la fiabilidad de las identificaciones y la sensibilidad de la cuantificación. Se ha comprobado que el 2,4,6-triclorofenol (TCP) y el pentaclorofenol (PCP) no interfieren en la determinación. Las fortificaciones de 30 y 300 mg/kg en cuero produjeron unas recuperaciones medias de TCMTB del 94% y 99%, respectivamente. Las recuperaciones de los otros fungicidas fueron similares. Los fungicidas investigados se determinaron en 40 muestras de cueros del mercado. En el 90% de las muestras se encontraron residuos de TCMTB. En resumen, la nueva norma ISO 13365:2011 proporciona un método rápido y fiable, no sólo para la determinación de las cuatro moléculas incluidas en el ámbito de aplicación de la norma, sino también para otros fungicidas como el IPBC y el MBT

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    Curtición vegetal con extracto de semilla de uva  Open access

     Ramon Arcal, Salvador; Bacardit Dalmases, Anna; Font Vallès, Joaquim; Olle Otero, Luis
    Congreso Asociación Química Española de la Industria del Cuero
    p. 1-23
    Presentation's date: 2012-05-17
    Presentation of work at congresses

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    El objetivo de este trabajo es estudiar la viabilidad de usar el extracto de semilla de uva procedente de subproductos de la industria vinícola, como fuente sostenible y renovable de taninos para curtir pieles vacunas al vegetal, frente a los extractos vegetales convencionales de quebracho, mimosa, castaño, gambier, o tara que provienen de arboles cultivados en zonas geográficas concretas. La substitución parcial en el proceso industrial de las tenerías de alguno de los extractos habituales por el de semilla de uva, contribuiría al esfuerzo por preservar la deforestación del planeta. Primero se comparan las características físicas de la piel vacuna curtida con un extracto único, para fabricar vaquetilla vegetal natural. Se evalúa el artículo obtenido y se controlan las resistencias a la tracción y al desgarro, alargamiento a la rotura, grueso, solidez a la luz, color y absorción de agua. También se realiza una cromatografía líquida de cada uno de los taninos usados. A continuación se realiza un “coupage” de extracto de semilla de uva con otros extractos comerciales para conseguir una vaquetilla con mejores prestaciones y se compara con productos comerciales presentes en el mercado de la marroquinería de alta calidad

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    Nuevas aplicaciones de la cromatografía iónica en el sector de curtidos  Open access

     Perez Quiñones, Carmen; Bacardit Dalmases, Anna; Olle Otero, Luis; Reyes Ferrera, Mª Reyes; Font Vallès, Joaquim
    Congreso Asociación Química Española de la Industria del Cuero
    p. 44-60
    Presentation's date: 2012-05-17
    Presentation of work at congresses

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    La industria de curtidos utiliza gran variedad de productos químicos en las diferentes etapas del proceso de curtición. Una parte de estos productos son absorbidos por las pieles, mientras que el resto pasan a las aguas residuales contribuyendo algunos de ellos al aumento de la salinidad. Muchos de estos productos químicos presentan un componente aniónico. En el contexto del control de calidad, los laboratorios del sector de curtidos tienen la necesidad de analizar especies aniónicas en diferentes muestras, tales como productos químicos, aguas residuales, baños de diferentes etapas y piel piquelada, curtida y acabada. En otros sectores, la tendencia actual en el análisis de aniones es el uso de técnicas sensibles y rápidas, como la cromatografía líquida de alta resolución. En este estudio se desarrollan métodos cromatográficos innovadores, con detección ultravioleta indirecta y directa, para la determinación simultánea de los principales aniones de interés en la industria de curtidos (cloruro, sulfato, nitrato, acetato, formiato, fosfato, nitrato, fluoruro y bromuro). Estos métodos se aplican a diferentes muestras. Se optimiza un método con cromatografía iónica y detección indirecta. La separación se realiza utilizando biftalato potásico como fase móvil. También se presenta un nuevo método cromatográfico simple, con detección ultravioleta directa y sulfato sódico como eluyente

  • Study of the weathering variables on chrome-tanned leather ageing

     Bacardit Dalmases, Anna; Jorba, Montse; Castell, Joan Carles; Font Vallès, Joaquim; Olle Otero, Luis
    IULTCS Congress
    p. 1-8
    Presentation's date: 2011-09-28
    Presentation of work at congresses

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    Since upholstery leather is considered a very high-tech product, a long service life is expected by the costumer. However, this type of leather can undergo extreme environmental conditions that may cause premature ageing. This work deals with the study of the effect of temperature, relative humidity, and UV radiation on leather ageing. Leathers with chrome tannage were exposed to weathering effects using a climatic chamber in order to identify the most important variables affecting this weathering process and to check for interactions. Both a multilevel centralized factorial experimental design and an analysis of variance (ANOVA) have been employed as statistical tools for estimating the effects of the parameters.

  • Use of LCA for environmental evaluation of end-of-pipe processess: a case study on tannery sludge treatment

     Kiliç, Eylem; Baquero Armans, Grau; Puig Vidal, Rita; Font Vallès, Joaquim; Colak, Selime; Gürler, Deniz
    LCA Case Studies Symposium SETAC-Europe
    p. 132-133
    Presentation's date: 2011-05-01
    Presentation of work at congresses

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  • Comparison of the effect of the tropical test on both chrome-tanned and wet-white upholstery leather

     Olle Otero, Luis; Jorba Rafart, Montse; Font Vallès, Joaquim; Bacardit Dalmases, Anna
    Journal of the Society of Leather Technologists and Chemists
    Vol. 95, num. 3, p. 109-115
    Date of publication: 2011
    Journal article

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    Automotive upholstery leather can undergo extreme environmental conditions that may cause premature ageing. Leather is strongly affected by three main environmental parameters: temperature,relative humidity and UV radiation. UV radiation causes colour change, fading, surface erosion, loss of gloss, etc. Increasing the levels of UV radiation represents a primary accelerating factor for leather ageing. Temperature produces thermal oxidation degradations, subsequent reaction rates and acceleration of other weathering reactions. Relative humidity acts as a chemical reagent in many hydrolytic weathering reactions and as a physical stressor of leather. Additionally, when relative humidity is over 65% leather is susceptible to mould attack. The aim of this work is to compare the effect of the tropical environment exposure on both chrometanned and wet-white upholstery leather.

  • Chromium recovery from tannery sludge with saponin and oxidative remediation

     Kiliç, Eylem; Font Vallès, Joaquim; Puig Vidal, Rita; Colak, Selime; Celik, Deniz
    Journal of hazardous materials
    Vol. 185, num. 1, p. 456-462
    DOI: 10.1016/j.jhazmat.2010.09.054
    Date of publication: 2011-01-15
    Journal article

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  • Biodegradation of leather tanned with inorganic salts

     Bacardit Dalmases, Anna; Jorba Montse, Montse; Font Vallès, Joaquim; Shendrik, Alexander; Olle Otero, Luis
    Journal of the Society of Leather Technologists and Chemists
    Vol. 95, num. 2, p. 63-67
    Date of publication: 2011-04-14
    Journal article

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    This paper aims to evaluate the physical, chemical and biological processes associated with the deterioration of leather tanned with inorganic salts. The samples of leather were exposed during eight months to outdoor weathering, and then their properties were evaluated. The results indicate that biodegration starts with dehydration, a partial scission of the protein chain of the collagen, detanning and a loss of oils due to volatilization and/or decomposition.

  • Biodegradation of wet-white leather

     Olle Otero, Luis; Jorba Rafart, Montse; Font Vallès, Joaquim; Shendrik, Alexander; Bacardit Dalmases, Anna
    Journal of the Society of Leather Technologists and Chemists
    Vol. 95, num. 3, p. 116-120
    Date of publication: 2011
    Journal article

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    This paper deals with the study of the physical, chemical and biological processes associated with the deterioration of wet-white leather. The samples of leather were exposed for eight months to outdoor weathering and then their properties were subsequently evaluated. The results indicate that resistance and dimensional stability of wet-white (THPS-syntan) leather is higher than that of chrometanned leather. The comparative work with chrome leather was described earlier.

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    Use of water-based carbonyl-functional polymers on a cross-linker-free highperformance leather finish  Open access

     Olle Otero, Luis; Urteaga, Eva; Font Vallès, Joaquim; Labastida, Luis; Bacardit Dalmases, Anna
    Afinidad: revista de química teórica y aplicada
    Vol. 68, num. 551, p. 15-19
    Date of publication: 2011-02
    Journal article

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    The present paper aims to study a new high-performance coating formulation while avoiding the use of cross-linkers. By using acrylic polymers with carbonyl functional groups, the negative environmental effects of the finishing process can be minimized. These new polymers can give very good physical properties without losing the inherent properties of flexibility and elasticity needed in upholstery leather

  • Environmental optimization of chromium recovery from tannery sludge using a life cycle assessment approach

     Kiliç, Eylem; Puig Vidal, Rita; Baquero Armans, Grau; Font Vallès, Joaquim; Colak, Selime; Gürler, Deniz
    Journal of hazardous materials
    Vol. 192, num. 1, p. 393-401
    DOI: 10.1016/j.jhazmat.2011.05.040
    Date of publication: 2011
    Journal article

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  • Alternative fungicides: comparisons with conventional chemicals

     Cuadros, Sara; Manresa, Mª Àngels; Font Vallès, Joaquim; Bautista, M. Elena; Maldonado, Fernando; Marsal Monge, Agustín
    Journal of the Society of Leather Technologists and Chemists
    Vol. 95, num. 6, p. 263-269
    Date of publication: 2011
    Journal article

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  • Determination of TCMTB and other fungicides in leather

     Font Vallès, Joaquim; Reyes, Maria; Cuadros, sara; Bacardit Dalmases, Anna; Marsal Monge, Agustín
    Journal of the American Leather Chemists Association
    Vol. 106, num. 11, p. 341-348
    DOI: 10.1117/1.3050421
    Date of publication: 2011-11-02
    Journal article

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  • Tecnologías limpias en tenería: aplicación de nuevos compuestos fungicidas medioambientalmente sostenibles

     Font Vallès, Joaquim; Marsal Monge, Agustín; Olle Otero, Luis; Puig Vidal, Rita; Bacardit Dalmases, Anna
    Competitive project

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  • Study of the effect of temperature, relative humidity and UV radiation on leather aging

     Bacardit Dalmases, Anna; Cobos, Mireia; Font Vallès, Joaquim; Jorge Sanchez, Juan; Olle Otero, Luis
    American Leather Chemists Association
    p. 8
    Presentation's date: 2010-06-11
    Presentation of work at congresses

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    Comparación del envejecimiento debido a la exposición a un ambiente tropical artificial y exposición directa a la intemperie  Open access

     Olle Otero, Luis; Cobos, Mireia; Font Vallès, Joaquim; Bacardit Dalmases, Anna
    Congreso de la Asociación Química Española de la Industria del Cuero
    p. 167-183
    Presentation's date: 2010-05-08
    Presentation of work at congresses

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    El cuero para tapicería de automóvil puede ser sometido a condiciones ambientales extremas produciendo su envejecimiento prematuro. Los factores más importantes en la degradación del cuero durante su exposición ambiental son la temperatura, la humedad relativa y la radiación UV. La radiación UV causa cambios de color, desteñidos, erosión de la superficie, pérdida de brillo, etc. El incremento de la radiación UV representa el primer factor acelerador del envejecimiento. La temperatura produce degradaciones oxidativas con posteriores reacciones que aceleran otras reacciones de envejecimiento. La humedad relativa actúa como un reactivo químico en diversas reacciones hidrolíticas de degradación y como acelerador de la pérdida de propiedades físicas del cuero. Adicionalmente, cuando la humedad realtiva es superior a 65% el cuero puede ser atacado por hongos. El objectivo de este trebajo es estudiar el efecto de la exposición de un cuero wet-white para tapicería a un ambiente tropical artificial y compararlo con los efectos obtenidos debido a una exposición directa a la intemperie. Mediante el incremento de los niveles de los tres factores críticos que producen el envejecimiento prematuro del cuero se podrá profundizar mejor en el estudio de los mecanismos de degradación del mismo.

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    Estudio del envejecimiento de la piel debido a la exposición directa a la intemperie  Open access

     Bacardit Dalmases, Anna; Cobos, Mireia; Font Vallès, Joaquim; Olle Otero, Luis
    Congreso de la Asociación Química Española de la Industria del Cuero
    p. 147-165
    Presentation's date: 2010-05-08
    Presentation of work at congresses

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    Un cuero para tapicería se considera un producto de alta tecnología que se puede utilizar en diversos sectores: mobiliario, automoción, aviación y naval. Sin embargo, para cada uno de estos sectores se exgen diferentes especificaciones de calidad. En el caso de tapicería para automóvil, la piel puede ser sometida a comdiciones ambientales agresivas que pueden provocar su envejecimiento prematuro. Aunque se han llevado a cabo distintos estudios sobre el deterioro de la piel, la mayor parte de éstos se han centrado en piel vegetal proveniente de los Museos y Centros de Conservación de la Piel. También se han realitzado trabajos sobre el envejecimiento de la piel sobre piel curtida al cromo, pero éstos se desarrollaron utilizando métodos de envejecimiento acelerado. No obstante, estudios realizados en otros sectores, como pueden ser el de plásticos y/o textiles, no han hallado ninguna correlación significativa entre los diferentes ensayos de laboratorio de envejecimiento acelerado y la exposición directa a la intemperie. El objectivo de este trebajo es estudiar el efecto de la exposición directa a la intemperie sobre dos tipos de piel para tapicería: piel curtida al cromo y piel curtida wet-white. La comparación de las propiedades analizadas en los dos tipos de piel muestran que mientras en la piel curtida al cromo, la pérdida de propiedades debida al envejecimiento se produce a los 40 días de exposición ambiental, en la piel curtida wet-white, la degradación empieza entre los 80-120 días.

  • Contribució a la reducció de l'ús de compostos orgànics volàtils (COVs) en el sector adober

     Cuadros Domènech, Rosa Maria
    Department of Engineering Design, Universitat Politècnica de Catalunya
    Theses

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  • Comparison of IUP 16 and microscopic hot table methods for shrinkage temperature determination

     Font Vallès, Joaquim; Espejo, Jenifer; Cuadros, Sara; Reyes, Maria Reyes; Bacardit Dalmases, Anna; Buti Papiol, Salvador
    Journal of the Society of Leather Technologists and Chemists
    Vol. 94, num. 2, p. 59-64
    Date of publication: 2010-04-15
    Journal article

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    In the leather industry, shrinkage temperature (Ts) is determined by the IUP 16 method. However, only microanalytical techniques like the Microscopic Hot Table (MHT) method are appropriate for the Ts of leather objects of historial value. No more than 0.1-0.4mg of sample is needed for the test. The precision and accuracy of the MHT method were investigated taking the official IUP 16 method as a reference. It was concluded that the Ts determined by both methods are in good agreement. The MHT method is precise and sensitive enough to state that small changes of 1.3ºC detected in Ts are statistically significant. The method was successfully applied to determine the Ts of several artefacts of the Leather Museum of Igualada.

  • Study of the effect of temperature, relative humidity and UV radiation on wet-white leather ageing

     Bacardit Dalmases, Anna; Cobos, Mireia; Font Vallès, Joaquim; Jorge Sanchez, Juan; Olle Otero, Luis
    Journal of the American Leather Chemists Association
    Vol. 105, num. 10, p. 334-341
    Date of publication: 2010-10-01
    Journal article

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    Since upholstery leather is considered a very high-tech product, a long service life is expected by the costumer. However, this type of leather can undergo extreme environmental conditions that may cause premature ageing. This work deals with the study of the effect of temperature, relative humidity, and UV radiation on leather ageing. Leathers with wet-white tannage were exposed to weathering effects using a climatic chamber in order to identify the most important variables affecting this weathering process and to check for interactions. Both a multilevel centralized factorial experimental design and an analysis of variance (ANOVA) have been employed as statistical tools for estimating the effects of the parameters.

  • Determination of dimethylfumarate in leather and footwear by solid-phase micro extraction and gas chromatography-mass spectrometry

     Cuadros Domènech, Rosa Maria; Font Vallès, Joaquim; Reyes Reyes, Maria; Olle Otero, Luis; Marsal Monge, Agustín
    Journal of the American Leather Chemists Association
    Vol. 105, num. 12, p. 395-400
    Date of publication: 2010-12-01
    Journal article

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    In the last two years, Europe has experienced a rise in skin allery and dermatitis due to goods and Asian provenance that have been treacted with dimethylfumarate (DMFU). Accordingly,laboratories in the leather and foodwear sectors have been obliged to develop analytical methods to determine the presence of this substance given de absence of an official method. The ban on DMFU as laid down in Decision 2009/251 of the European Union establishes a maximun concentration of DMFU in products of 0.1 mg/Kg. A simple nom-destructive rapid method based on manual headspace solid-phase micro extraction (HS-SPME) and gas cromatography-mass spectrometry (GC-MS)is proposed to detect DMFU in leather and footwear. Thereafter, the samples which DMFU is detected are analysed by solid-liquid extraction (SLE) with acetone after which DMFU is quantitatively determined by GC-MS. The quantitative method in validated in terms of linearity, precision, sensivity and recovery; demostrating its reliability. Quantification of this performed used naphthalene-D8 as internal standard. The detection limits are 0.005 mg/Kg and 0.03 mg/Kg for the HS-SPME-GC-MS and SLE-GC-MS methods, respectively. Given that these limits are bellow the maximun limit of 0.1 mg/Kg imposed by the European Union, the proposed methods are suitable for determining DMFU content in real samples.

  • SMOS: The Challenging Sea Surface Salinity Measurement From Space

     Font Vallès, Joaquim; Camps Carmona, Adriano Jose; Borges, Andrés; Martín Neira, Manuel; Boutin, J.; Reul, Nicolas; Kerr, Yann H.; Hahne, Achim; Mecklenburg, Susanne
    Proceedings of the IEEE
    Vol. 98, num. 5, p. 649-665
    DOI: 10.1109/JPROC.2009.2033096
    Date of publication: 2010-05
    Journal article

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  • Recovery of proteins from wastewater of tannery beamhouse operations: influence on the main pollution parameters

     Marsal Vinade, Albert; Hernandez García, Emilio; Cuadros, Sara; Puig Vidal, Rita; Bautista, E.; Font Vallès, Joaquim
    Water science and technology
    Vol. 62, num. 3, p. 658-666
    Date of publication: 2010
    Journal article

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  • La pell

     Bacardit Dalmases, Anna; Canyelles, Núria; Font Vallès, Joaquim; Puig Vidal, Rita; Font, Esther
    Date of publication: 2010-04-01
    Book

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  • Estudi analític del residu sòlid trobat a l'interior d'una àmfora ibèrica

     Font Vallès, Joaquim; Enrich, Joan
    Date of publication: 2009
    Book chapter

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  • Millores en el control del procés de fabricació de ciment mitjançant calibració basada en el mètode de mínims quadrats clàssics

     Riba Ruiz, Jordi Roger; Font Vallès, Joaquim; Rodriguez, Daniel; Puig Vidal, Rita
    Afinidad: revista de química teórica y aplicada
    Vol. 66, num. 543, p. 358-364
    Date of publication: 2009
    Journal article

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  • Recovery of organic nitrogen from beamhouse wastewater in a hair recovery process

     Rius Carrasco, Antoni; Marsal Monge, Agustín; Bautista, E.; Cuadros, Sara; Reyes Reyes, Maria; Font Vallès, Joaquim
    Journal of the Society of Leather Technologists and Chemists
    Vol. 93, num. 5, p. 176-182
    Date of publication: 2009
    Journal article

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    In the leather industry, in addition to the extrinsic contamination attributable to chemical products not absorbed by the hides, there is intrinsic contamination produced by the hides themselves. From each 100kg of raw material, 15kg of solubilised protein will end up in wastewater in the early stages of the process of transforming hides into leather. These proteins contain nearly 18% of nitrogen. In this study it is proposed to recover organic nitrogen from the proteins present in the effluents of the beamhouse operations of hides and the subsequent revalorization of the protein fraction obtained. This work seeks to characterize (the chemical oxygen demand (COD), total nitrogen, ammonium nitrogen, total soluble nitrogen, particulate nitrogen, organic nitrogen and protein) the wastewaters, individually or in groups, of the various beamhouse operations (soaking, unhairing-liming, washing, conditioning, deliming, bating, washing and pickling) with hair recovery. The studies are presented of the determination of the pH value (adjusted by means of buffers of acetic acid/sodium acetate) at which the greatest precipitate of the protein fraction is produced. In addition, the following tests were performed to characterize these precipitates: determination of the quantitative composition of the main components of the protein fraction (humidity, proteins, free amino acids, fats and other matter soluble in dichloromethane and ash); heavy metals content, calcium, magnesium, potassium and sodium and the composition in total amino acids with prior acid hydrolysis of the protein fraction with 6N hydrochloric acid.

  • Improving the control of the cement making process by applying multivariate classical least squares calibration

     Riba Ruiz, Jordi Roger; Font Vallès, Joaquim; Rodriguez, Daniel; Puig Vidal, Rita
    Afinidad: revista de química teórica y aplicada
    Vol. 66, num. 543, p. 358-364
    Date of publication: 2009-10
    Journal article

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  • Waste water reutilization in the leather industry using membrane technology

     Roig, Joan; Font Vallès, Joaquim; Marginet, Xavier; Jorba, M.; Olle Otero, Luis; Bacardit Dalmases, Anna; Puig Vidal, Rita
    Journal of the American Leather Chemists Association
    Vol. 104, num. 4, p. 139-148
    Date of publication: 2009
    Journal article

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  • Minimisation of volatile organics in a metallic foil patent finish for uppers and leather goods

     Olle Otero, Luis; Bacardit Dalmases, Anna; Font Vallès, Joaquim; Cuadros Domènech, Rosa Maria; Cobos, M
    Journal of the Society of Leather Technologists and Chemists
    Vol. 93, num. 3, p. 97-102
    Date of publication: 2009-06
    Journal article

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  • Reutilización de agua regenerada en la producción de cuero

     Roig, Joan; Font Vallès, Joaquim; Marginet, Xavier; Jorba, M.; Olle Otero, Luis; Puig Vidal, Rita; Elías Castells, Xavier; Puigdengoles, Josep M.
    57 Congreso de la Asociación Química Española de la Industria del Cuero
    p. 45-60
    Presentation's date: 2008-04
    Presentation of work at congresses

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  • Inter-laboratory study on formaldehyde determination by HPLC

     Font Vallès, Joaquim; Viera, Susanna; Cuadros, Sara; Rius Carrasco, Antoni; Reyes Reyes, Maria; Verdú, Emilio; Jorba, Montse; Juárez, Miguel-Angel; Marsal Monge, Agustín
    Journal of the American Leather Chemists Association
    Vol. 103, num. 3, p. 53-61
    Date of publication: 2008
    Journal article

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  • Recuperación del nitrógeno orgánico presente en los baños de ribera. Parte I.

     Marsal Monge, Agustín; Cuadros, Sara; Reyes Reyes, Maria; Rius Carrasco, Antoni; Font Vallès, Joaquim
    Latin American Congress of the IULTCS
    Presentation's date: 2008-10
    Presentation of work at congresses

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  • Determinació de la DQO pel mètode del Reflux Tancat

     Font Vallès, Joaquim
    Date of publication: 2007-11
    Book chapter

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  • Recuperació del Crom: Filtre de Premsa

     Cuadros Domènech, Rosa Maria; Lalueza Baro, Joana; Font Vallès, Joaquim
    Date of publication: 2007-11
    Book chapter

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  • Sequential injection analysis with second-order treatment for the determination of dyes in the exhaustion process of tanning effluents

     Gómez, Verónica; Font Vallès, Joaquim; Callao, Maria Pilar
    Talanta
    Vol. 71, num. 3, p. 1393-1398
    Date of publication: 2007-02-28
    Journal article

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    A sequential injection (SI)-DAD spectrophotometric method to control the exhaustion of dyes in a mixture of three dyes from a tanning industry process has been developed. It is based on an interdiffusion process of the sample and reagents which leads to a gradual fall in pH through the channel to the detector recording a data matrix. The aim of this paper is to develop a second-order calibration model that is unaffected by interferents by applying multivariate curve resolution with alternating least squares (MCR-ALS). We obtained a linear calibration in the 5–30 mg l−1 range with a correlation coefficient of 0.999 for each dye with detection limits of 2.6, 3.9 and 2.1 mg l−1 for Acid Red, Acid Brown and Acid Orange, respectively. The simultaneous determination of the three dyes from tanning samples showed a satisfactory precision for the three analytes. The method has been validated comparing the concentration of some spiked samples with the expected concentration using a t-paired test. When we used this method to study the exhaustion of dyes, we found that there were several stages in this process. These data may be the key to optimising the exhaustion process.

  • Fourier transform infrared spectroscopy as a suitable technique in the study of the materials used in waterproofing of archaeological amphorae

     Font Vallès, Joaquim; Salvado Cabre, Nativitat; Buti Papiol, Salvador; Enrich, J
    Analytica chimica acta
    Vol. 598, num. 1, p. 119-127
    Date of publication: 2007-08
    Journal article

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  • Sequestering of chromium (III) from tanning effluents by means of biotechnology methodologies

     Lalueza Baro, Joana; Rius Carrasco, Antoni; Olle Otero, Luis; Puig Vidal, Rita; Font Vallès, Joaquim; Martí Badia, Maria Elena; Amils, R; Rodríguez, N
    II IULTCS Eurocongress (International Union of Leather Technologists and Chemists Societies)
    p. 51
    Presentation's date: 2006-05-26
    Presentation of work at congresses

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  • A public database for pollution prevention technologies in the tanning sector

     Rius Carrasco, Antoni; Soler Solé, Jaume; Puig Vidal, Rita; Font Vallès, Joaquim; Olle Otero, Luis
    IULTCS Eurocongress
    p. 50
    Presentation's date: 2006-05-25
    Presentation of work at congresses

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  • Access to the full text
    Libro de calidad para la producción de piel y cuero libre de Cromo(VI)  Open access

     Font Vallès, Joaquim; Marsal Monge, Agustín; Aparicio, Enrique; Sánchez, Daniel; Ribera, Antoni
    Asociación Química Española de la Industria del Cuero
    p. 19-29
    Presentation's date: 2006-05-06
    Presentation of work at congresses

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  • Prevention of chromium(VI) formation by improving the tannery processes

     Font Vallès, Joaquim; Rius Carrasco, Antoni; Marsal Monge, Agustín; Hauber, Christiane; Tommaselli, Michelle
    Eurocongress of the International Union of Leather Technicians and Chemists Societies (IULTCS)
    Presentation's date: 2006-05
    Presentation of work at congresses

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    This work has been funded by the European Commission through the Chrom6less Project (CRAFT -1999-71638). The objectives of the project were: - Establishment of the analytical methodology which provided reproducible results that may be free of interferences. - Identification of the factors that facilitated or impeded the transformation of Cr(III) to Cr(VI). - Establishment of the best conditions that allowed the production of chromium(VI) free leather, even during the life of the product, in contact with environmental agents such as light or heat. The following partners participated in the project: Inpelsa, Dercosa, Proquip, Igualada Leather Technology School, CID-CSIC and Miguel Hernandez University, from Spain, Gmelich, Knoll Sitzleder, and Lederinstitut Gerberschule Reutlingen from Germany, and Conceria Il Cigno, Calzaturificio Accademia and Stazione Experimentale from Italy. Hundreds of samples have been analysed during the project. In order to study the influence of several factors in chromium (VI) formation, a lot of skins/hides have been produced. Several leather articles (hides for clothing, footwear, upholstery, leather goods and furniture upholstery and skins for suede and double face)) have been manufactured free from Cr (VI). The main results obtained were: - The new analytical method CEN/TS 14495 has been validated. - Protective measures for the prevention of chromium (VI) formation have been identified. - New formulations for several hides/skins have been developed. - A handbook for the production of chromium (VI)-free leather has been published. The main conclusions of the project were: - The Chrom6less Project has shown that most of the skins/leathers did not contain hexavalent chromium. - It is now possible to confidently determine the Cr(VI) content in all kinds of leather regardless of their colour. - The application of protective measures developed in the Project allows leather to resist the effect of ageing without the formation of Cr(VI).

  • Chromium(III) recovery from tanning effluents using biotechnology methodologies

     Puig Vidal, Rita; Amils, R; Rodríguez, N; Lalueza Baro, Joana; Rius Carrasco, Antoni; Olle Otero, Luis; Font Vallès, Joaquim
    XXVIII IULTCS Congress
    p. 144-145
    Presentation's date: 2005-03
    Presentation of work at congresses

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  • Salinity reduction in the production of nappa skins by using agents with non-swelling capacity in pickling/tanning

     Marsal Monge, Agustín; Rius Carrasco, Antoni; Cot Cosp, Jaume; Lalueza Baro, Joana; Ramón, Palop; Font Vallès, Joaquim
    Journal of the Society of Leather Technologists and Chemists
    Vol. 89, num. 6, p. 232-236
    Date of publication: 2005
    Journal article

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