Azo dyes degradation and mutagenicity evaluation with a combination of microbiological and oxidative discoloration treatments

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dc.contributor.authorRodrigues de Almeida, Erica Janaina
dc.contributor.authorChristofoletti Mazzeo, Dânia Elisa [UNESP]
dc.contributor.authorDeroldo Sommaggio, Lais Roberta [UNESP]
dc.contributor.authorMarin-Morales, Maria Aparecida [UNESP]
dc.contributor.authorRodrigues de Andrade, Adalgisa [UNESP]
dc.contributor.authorCorso, Carlos Renato [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-06T17:19:53Z
dc.date.available2019-10-06T17:19:53Z
dc.date.issued2019-11-15
dc.description.abstractThis work evaluated the degradation of the Acid Blue 161 and Procion Red MX-5B dyes in a binary solution by the filamentous fungus Aspergillus terreus and the yeast Saccharomyces cerevisiae in systems with and without electrochemical oxidation as the pretreatment process. UV–Vis spectrophotometry, high-performance liquid chromatography with (HPLC), Fourier transform infrared (FT-IR) spectroscopy and Salmonella/microsome assay (Ames test) were applied towards the degradation analysis of the dyes. Adsorption tests with white clay immobilized on alginate were also conducted after the discoloration treatments to remove intermediate metabolites formed during the degradation of the dye molecules. The discoloration treatments led to the complete color removal of the solutions in all the systems tested. The clay demonstrated affinity for the metabolites formed after discoloration treatments, the removal rates were variable, but the all systems has proved efficient. The Salmonella/microsome assay (Ames test) with strains TA98 and TA100 in the absence and presence of exogenous metabolism (S9 microsomal system, Moltox) revealed that the initial molecules and by-products of the metabolism of the dyes were direct mutagens. The electrochemical/A. terreus/clay system was able to discolor the solutions and transform the direct mutagens into non-mutagenic compounds in addition to reducing the mutagenic potency of the pro-mutagens to the Salmonella strain TA100/S9, which demonstrates the high efficiency of this system with regard to discoloring and degrading azo dye molecules and their by-products. Therefore, this study showed that although not having standard treatment system for this type of pollutant, the combination of treatments can be considered promising. The use of electrochemical oxidation along with microbiological treatment may lead to the degradation and mineralization of these compounds, reducing or eliminating the environmental impact caused by the improper disposal of these dyes in aquatic environments.en
dc.description.affiliationDepartamento de Química Faculdade de Filosofia Ciências e Letras de Ribeirão Preto Universidade de São Paulo
dc.description.affiliationDepartamento de Bioquímica e Microbiologia Instituto de Biociências Universidade Estadual de São Paulo (Unesp), Av. 24-A, 1515
dc.description.affiliationDepartamento de Biologia Instituto de Biociências Universidade Estadual de São Paulo (Unesp), Av. 24-A, 1515
dc.description.affiliationUnesp National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry, P.O. Box 355
dc.description.affiliationUnespDepartamento de Bioquímica e Microbiologia Instituto de Biociências Universidade Estadual de São Paulo (Unesp), Av. 24-A, 1515
dc.description.affiliationUnespDepartamento de Biologia Instituto de Biociências Universidade Estadual de São Paulo (Unesp), Av. 24-A, 1515
dc.description.affiliationUnespUnesp National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry, P.O. Box 355
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)
dc.description.sponsorshipUniversidade Estadual Paulista
dc.description.sponsorshipIdFAPESP: 2013/25535-4
dc.description.sponsorshipIdFAPESP: 2014/50945-4
dc.description.sponsorshipIdCNPq: INCT 465571/2014-0
dc.identifierhttp://dx.doi.org/10.1016/j.ecoenv.2019.109484
dc.identifier.citationEcotoxicology and Environmental Safety, v. 183.
dc.identifier.doi10.1016/j.ecoenv.2019.109484
dc.identifier.issn1090-2414
dc.identifier.issn0147-6513
dc.identifier.scopus2-s2.0-85071997680
dc.identifier.urihttp://hdl.handle.net/11449/190638
dc.language.isoeng
dc.relation.ispartofEcotoxicology and Environmental Safety
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAzo dyes
dc.subjectElectrochemical treatments
dc.subjectMicrobiological treatments
dc.subjectSalmonella/microsome assay
dc.subjectWastewater treatment
dc.titleAzo dyes degradation and mutagenicity evaluation with a combination of microbiological and oxidative discoloration treatmentsen
dc.typeArtigo

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