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Assessment of the Total Organic Carbon and Conductivity in Consecutive Dyeings with Reactive Dyestuffs Using Treated Effluent by UV/H202 Photocatalysis

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Journal of Chemistry and Chemical Engineering 2014年第2期8卷 139-144页

作者： Leite Adilson da SilvaI Barco Luiz Trindade Nelson Barros Araujo Mauricio de Campos Rosa Jorge Marcos Tambourgi Elias Basile Santana José Carlos Curvelo Chemical textile post graduation Department College of Technology SENAI Antoine Skaf $6o Paulo 03008-020 Brazil textile and fashion post graduation program S6o Paulo University S6o Paulo 03828-000 Brazil College of Chemical Engineering State University of Campinas Campinas 13083-852 Brazil Production Engineering post graduation program Nove de Julho University Sao Paulo 05001-100 Brazil

The paper was monitored the conductivity （g.L＂l of NaCI）, the absorbances values （Abs） and the amount of TOC （total organic carbon）, before and after five consecutive dyeings made with reuse water, obtained from treated effluent by UV/H202 photocatalysis. All rates of decolorization were above 92%, the removal of total organic carbon was above 89% in all treatments and the economy of NaCI was from 3.10 in the first recipe, 3.17 in the second, 3.49 in the third, 3.79 in the fourth and 4.05 in the fifth recipe. The five dyeings compared with same dyeings made with deionized water presented a color deviation （AE＊） below 1. The conventional dyeings would consume 80 L/kg against 40 L/kg used in the dyeing process proposed in this study, representing a great economy of water, with no discharge of effluents.

关键词： Conductivity reactive dyestuffs reuse of water photocatalysis textile effluent.

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Ecological Costs Applied in the Bleaching of Cotton： A Study for an Optimized Process

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Journal of Chemistry and Chemical Engineering 2013年第7期7卷 633-636页

作者： Rosa Jorge Marcos Tambourgi Elias Basile Santana Jose Carlo Curvelo Carmo Renee Simoes Argolo Arafjo Mauricio de Campos College of Chemistry Engineering State University of Campinas Sao Paulo 03008-020 Brazil post graduation Department College of Technology Antoine Skaf Sao Paulo 03008-202 Brazil Production Engineering post graduation program Nine o f July University Sao Paulo 5001-100 Brazil textile and fashion post graduation program Sao Paulo University S6o Paulo 03828-000 Brazil

The aim of this paper was to study three variables in hydrogen peroxide bleaching of cotton fabrics： the amount of hydrogen peroxide （H2O2）, peroxide stabilizer （Na2SiO3） and the process temperature. The factorial planning of two levels and three factors was done in order to obtain an optimized recipe for subsequent comparison with commons recipes used in industry. Were evaluated the brightness （DL）, energy consumption （dQ）, H2O2 residual （Rox）, processing time and ecological costs.

关键词： Cotton bleaching factorial planning ecological costs.

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