Decolorization of the metal textile dye Lanaset Grey G by immobilized white-rot fungi.
Identifieur interne : 000035 ( PubMed/Checkpoint ); précédent : 000034; suivant : 000036Decolorization of the metal textile dye Lanaset Grey G by immobilized white-rot fungi.
Auteurs : Dalel Daâssi [Tunisie] ; Tahar Mechichi ; Moncef Nasri ; Susana Rodriguez-CoutoSource :
- Journal of environmental management [ 1095-8630 ] ; 2013.
Descripteurs français
- KwdFr :
- MESH :
- Wicri :
- geographic : Tunisie.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Alginates, Glucuronic Acid, Hexuronic Acids.
- chemical , metabolism : Chromium, Cobalt, Coloring Agents, Water Pollutants, Chemical.
- geographic : Tunisia.
- metabolism : Coriolaceae, Trametes.
- Biodegradation, Environmental.
Abstract
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.
DOI: 10.1016/j.jenvman.2013.07.026
PubMed: 23978620
Affiliations:
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pubmed:23978620Le document en format XML
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<front><div type="abstract" xml:lang="en">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.</div>
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