With the development of the textile industry, there has been a demand for dye removal from contam... more With the development of the textile industry, there has been a demand for dye removal from contaminated effluents. In recent years, attention has been directed toward various natural solid materials that are capable of removing pollutants from contaminated water at low cost. One such material is sugarcane bagasse. The aim of the present study was to evaluate adsorption of the dye Acid Violet Alizarin N with different concentrations of sugarcane bagasse and granulometry in agitated systems at different pH. The most promising data (achieved with pH 2.5) was analyzed with both Freundlich and Langmuir isotherms equations. The model that better fits dye adsorption interaction into sugarcane bagasse is Freundlich equation, and thus the multilayer model. Moreover, a smaller bagasse granulometry led to greater dye adsorption. The best treatment was achieved with a granulometry value lower than 0.21 mm at pH 2.50, in which the total removal was estimated at a concentration of 16.25 mg mL−1. Hence, sugarcane bagasse proves to be very attractive for dye removal from textile effluents.
Resumo: Águas residuais de uma indústria de temperos liofilização foi eletrolítica para aumentar ... more Resumo: Águas residuais de uma indústria de temperos liofilização foi eletrolítica para aumentar a sua biodegradabilidade. Eletrodos de aço inoxidável foram usadas em 9, 09 A/m², para até 80 min. PH, condutividade, bioquímica (DBO) e química demandas (COD) ...
Journal of Industrial Microbiology & Biotechnology, 2008
The aim of the present work was to observe microbial decolorization and biodegradation of the Dir... more The aim of the present work was to observe microbial decolorization and biodegradation of the Direct Violet 51 azo dye by Candida albicans isolated from industrial effluents and study the metabolites formed after degradation. C. albicans was used in the removal of the dye in order to further biosorption and biodegradation at different pH values in aqueous solutions. A comparative study of biodegradation analysis was carried out using UV-vis and FTIR spectroscopy, which revealed significant changes in peak positions when compared to the dye spectrum. Theses changes in dye structure appeared after 72 h at pH 2.50; after 240 h at pH 4.50; and after 280 h at pH 6.50, indicating the different by-products formed during the biodegradation process. Hence, the yeast C. albicans was able to remove the color substance, demonstrating a potential enzymatic capacity to modify the chemical structure of pigments found in industrial effluents.
Brazilian Archives of Biology and Technology, 2010
Page 1. Braz. Arch. Biol. Technol. v.53 n.2: pp. 473-480, Mar/Apr 2010 473 Vol.53, n. 2: pp. 473-... more Page 1. Braz. Arch. Biol. Technol. v.53 n.2: pp. 473-480, Mar/Apr 2010 473 Vol.53, n. 2: pp. 473-480, March-April 2010 ISSN 1516-8913 Printed in Brazil BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY ANINTERNATIONALJOURNA L ...
With the development of the textile industry, there has been a demand for dye removal from contam... more With the development of the textile industry, there has been a demand for dye removal from contaminated effluents. In recent years, attention has been directed toward various natural solid materials that are capable of removing pollutants from contaminated water at low cost. One such material is sugarcane bagasse. The aim of the present study was to evaluate adsorption of the dye Acid Violet Alizarin N with different concentrations of sugarcane bagasse and granulometry in agitated systems at different pH. The most promising data (achieved with pH 2.5) was analyzed with both Freundlich and Langmuir isotherms equations. The model that better fits dye adsorption interaction into sugarcane bagasse is Freundlich equation, and thus the multilayer model. Moreover, a smaller bagasse granulometry led to greater dye adsorption. The best treatment was achieved with a granulometry value lower than 0.21 mm at pH 2.50, in which the total removal was estimated at a concentration of 16.25 mg mL−1. Hence, sugarcane bagasse proves to be very attractive for dye removal from textile effluents.
Resumo: Águas residuais de uma indústria de temperos liofilização foi eletrolítica para aumentar ... more Resumo: Águas residuais de uma indústria de temperos liofilização foi eletrolítica para aumentar a sua biodegradabilidade. Eletrodos de aço inoxidável foram usadas em 9, 09 A/m², para até 80 min. PH, condutividade, bioquímica (DBO) e química demandas (COD) ...
Journal of Industrial Microbiology & Biotechnology, 2008
The aim of the present work was to observe microbial decolorization and biodegradation of the Dir... more The aim of the present work was to observe microbial decolorization and biodegradation of the Direct Violet 51 azo dye by Candida albicans isolated from industrial effluents and study the metabolites formed after degradation. C. albicans was used in the removal of the dye in order to further biosorption and biodegradation at different pH values in aqueous solutions. A comparative study of biodegradation analysis was carried out using UV-vis and FTIR spectroscopy, which revealed significant changes in peak positions when compared to the dye spectrum. Theses changes in dye structure appeared after 72 h at pH 2.50; after 240 h at pH 4.50; and after 280 h at pH 6.50, indicating the different by-products formed during the biodegradation process. Hence, the yeast C. albicans was able to remove the color substance, demonstrating a potential enzymatic capacity to modify the chemical structure of pigments found in industrial effluents.
Brazilian Archives of Biology and Technology, 2010
Page 1. Braz. Arch. Biol. Technol. v.53 n.2: pp. 473-480, Mar/Apr 2010 473 Vol.53, n. 2: pp. 473-... more Page 1. Braz. Arch. Biol. Technol. v.53 n.2: pp. 473-480, Mar/Apr 2010 473 Vol.53, n. 2: pp. 473-480, March-April 2010 ISSN 1516-8913 Printed in Brazil BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY ANINTERNATIONALJOURNA L ...
Uploads
Papers