Decolorization of the metal textile dye Lanaset Grey G by immobilized white-rot fungi.
In this paper we studied the ability of four Tunisian-isolated fungi (i.e. Coriolopsis gallica, Bjerkandera adusta, Trametes versicolor and Trametes trogii) immobilized into Ca-alginate beads to decolorize the metal textile dye Lanaset Grey G (LG). The effect of different operational conditions, such as initial dye concentration, temperature, pH, beads/medium ratio and agitation, on dye decolorization by the immobilized fungi was investigated. Maximal decolorization percentages of 88.7%, 89.3%, 82.1% and 81.3% for C. gallica, B. adusta, T. versicolor and T. trogii were attained, respectively, when operating at an initial LG concentration of 150 mg/L, pH values of 5.0-6.0, temperatures of 40-45 °C and a beads/medium ratio of 20% (w/v) in static conditions after 72 h of incubation. Subsequently, the re-usability of the immobilized fungi was evaluated. After three decolorization cycles, the decolorization percentage of free cell cultures dropped to values below 36%, while decolorization percentages of about 75%, 70%, 60% and 68% were obtained by the immobilized cultures of C. gallica, B. adusta, T. versicolor and T. trogii, respectively.
['Daâssi|Dalel|D|', 'Mechichi|Tahar|T|', 'Nasri|Moncef|M|', 'Rodriguez-Couto|Susana|S|']
D000464:Alginates D001673:Biodegradation, Environmental D002857:Chromium D003035:Cobalt D004396:Coloring Agents D055453:Coriolaceae D020723:Glucuronic Acid D006603:Hexuronic Acids D055454:Trametes D014416:Tunisia D014874:Water Pollutants, Chemical
Metal textile dye Immobilization White-rot fungi Alginate Biodegradation