Document Detail

Treatment of a Textile Effluent from Dyeing with Cochineal Extracts using Trametes versicolor Fungus.
MedLine Citation:
PMID:  21552764     Owner:  NLM     Status:  In-Data-Review    
Trametes versicolor (Tv) fungus can degrade synthetic dyes that contain azo groups, anthraquinone, triphenylmethane polymers, and heterocyclic groups. However, no references have been found related to the degradation of natural dyes, such as the carminic acid that is contained in the cochineal extract. Experiments to determine the decolorization of the effluent used in the cotton dyeing process with cochineal extract by means of Tv fungus were done. Treatments to determine decolorization in the presence or absence of Kirk's medium, glucose, and fungus, with an addition of 50% (v v-1) of nonsterilized effluent were performed. Physicochemical characterization was performed at the start and end of the treatment. Degradation kinetics were determined. A direct relationship was found between the dry weight of fungi, pH, and the decolorization system, with higher decolorization at lower pH levels (pH ~4.3). High decolorization (81% ± 0.09; 88% ± 0.17; and 99% ± 0.04) for three of the eight treatments (Kirk's medium without glucose, Kirk's medium with glucose, and without medium with glucose, respectively) was found. Toxicity tests determined an increase in the initial effluent toxicity (7.33 TU) compared with the final treatment (47.73 TU) in a period of 11 days. For this system, a degradation sequence of the carminic acid structure present in the effluent by the Tv fungus is suggested, in which it is seen that metabolites still containing aromatic structures are generated.
Gabriela Arroyo-Figueroa; Graciela M L Ruiz-Aguilar; Leticia López-Martínez; Guillermo González-Sánchez; Germán Cuevas-Rodríguez; Refugio Rodríguez-Vázquez
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Publication Detail:
Type:  Journal Article     Date:  2011-05-05
Journal Detail:
Title:  TheScientificWorldJournal     Volume:  11     ISSN:  1537-744X     ISO Abbreviation:  ScientificWorldJournal     Publication Date:  2011  
Date Detail:
Created Date:  2011-05-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101131163     Medline TA:  ScientificWorldJournal     Country:  England    
Other Details:
Languages:  eng     Pagination:  1005-16     Citation Subset:  IM    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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