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Öğe Adsorptive removal of textile dyes from aqueous solutions by dead fungal biomass(Wiley, 2006) Asma, D; Kahraman, S; Cing, S; Yesilada, ODead fungal biomass prepared from Phanerochaete chrysosporium and Funalia trogii was tested for their efficiency in removal of textile dyes. The effects of contact time, initial dye concentration, amount of dead biomass and agitation rate on dye removal have been determined. Removal of all dyes required a very short time (60 min). Experimental results show that, P. chrysosporium was more effective than F. trogii. An increase in the amount of dead biomass positively affected of the dye removal. The removal efficiency of different amount of biomass was in order 1g > 0.5 > 0.2 > 0.1 The highest removal was obtained at 150-200 rpm. Slightly lower removing activities were found at lower agitation rates. This study showed that it was possible to remove textile dyes by dead biomass of P. chrysosporium.Öğe Astrazon Red dye decolorization by growing cells and pellets of Funalia trogii(Wiley, 2004) Cing, S; Yesilada, OThe dye decolorization activity of fungal pellets has been compared with another method based on the decolorization of dye by growing cells. The pellet method was more advantageous than the growing cell method. The growing cells of F. trogii decolorized 21% of the dye in distilled water medium and 16% in stock basal medium in 24 h. On the other hand, Funalia trogii pellets rapidly decolorized the Astrazon Red dye, mono-azo textile dye, in 24 h, without any visual sorption of any dye to the pellets. The effect of various supplements on longevity of decolorization by free pellets was also tested. Glucose and cheese whey supplementation improved dye decolorization performance of the pellets and remained high and stable for 10 days. We also tested the dye decolorization ability of pellets immobilized on activated carbon. These pellets showed the stable dye decolorization activity during the repeated batch experiments. The study revealed that dye decolorization by pellets is more effective method than the growing cell method.Öğe Decolorization of textile dyeing wastewater by Phanerochaete chrysosporium(Folia Microbiologica, 2003) Cing, S; Asma, D; Apohan, E; Yesilada, OThe potential use of fungal pellets for decolorization of the textile dyeing wastewater was evaluated. The live pellets of the fungus Phanerochaete chrysosporium were found to remove more than 95% of the color of this wastewater within 1 d. The dye-removal capacity was a function of time and was proportional to the agitation rate; the optimum temperature was 30 degreesC. Both live and dead pellets were further examined in a repeated-batch mode for 5 d. The decolorization performance of live pellets remained high and stable for 5 d and they showed twice to thrice higher decolorization capacity than dead pellets.Öğe Decolorization of textile dyes by fungal pellets(Elsevier Sci Ltd, 2003) Yesilada, O; Asma, D; Cing, SDecolorization of various dyes by pellets of white rot fungi was studied. All fungal pellets used could remove more than 75% of the color of these dyes in 24 h. Effect of various conditions such as initial pH, concentration of dye, amount of pellet, temperature and agitation on Astrazone blue dye decolorization activity of Funalia trogii was tested and the longevity of this decolorization activity under optimum conditions was investigated in repeated-batch mode. An increase in the amount of pellet positively affected the longevity of the decolorization activity while a decrease in dye decolorization capability of pellets occurred with increasing dye concentration in repeated-batch mode. Spectrophotometric and microscopic examinations of F trogii pellets showed that the process involved decolorization through microbial metabolism but not biosorption. The effect of glucose concentration and cheese whey on longevity of decolorization activity was also tested. The percentage of decolorization at a dye concentration of 264 mg/l remained high after 10 days operation especially in culture media with cheese whey. This study showed that white rot fungal pellets could effectively be used as an alternative to the traditional physicochemical process. (C) 2002 Elsevier Science Ltd. All rights reserved.Öğe Decolourisation of the textile dye astrazon red FBL by Funalia trogii pellets(Elsevier Sci Ltd, 2002) Yesilada, O; Cing, S; Asma, DThe effects of various conditions such as initial pH, dye concentrations, amount of pellet, temperature and agitation on decolourising activity of Funalia trogii were investigated. These, except initial pH, were all found to be important for dye decolourising activity of F. trogii. The decolourisation of the dye involved adsorption of the dye compound by fungal pellets at the initial stage, followed by the decolourisation through microbial metabolism. Heat-killed pellets were also tested for their ability to decolourise Astrazon Red dye. These pellets adsorbed the dye and 55% decolourisation was obtained in 24 h. But at the second cycle there was only 24% decolourisation. Our observation showed that Astrazon Red dye decolourisation by heat-killed pellets was mainly due to biosorption. The longevity of the decolourisation activity of F. trogii pellets was also investigated in repeated batch mode. Variations in the amount of pellet increased % decolourisation and stability of pellets. (C) 2001 Elsevier Science Ltd. All rights reserved.
