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https://hdl.handle.net/1822/17313
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Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Franciscon, E. | - |
dc.contributor.author | Zille, Andrea | - |
dc.contributor.author | Fantinatti-Garboggini, F. | - |
dc.contributor.author | Silva, I. S. | - |
dc.contributor.author | Paulo, Artur Cavaco | - |
dc.contributor.author | Durrant, L. R. | - |
dc.date.accessioned | 2012-02-21T17:19:11Z | - |
dc.date.available | 2012-02-21T17:19:11Z | - |
dc.date.issued | 2009 | - |
dc.identifier.issn | 1359-5113 | por |
dc.identifier.uri | https://hdl.handle.net/1822/17313 | - |
dc.description.abstract | Four different azo dyes were decolourized and biodegraded in a sequential microaerophilic–aerobic treatment by a facultative Klebsiella sp. strain VN-31, a bacterium isolated from activated sludge process of the textile industry. Dye decolourization was performed under microaerophilic conditions until no colour was observed (decolourization percentage >94%). The medium was then aerated to promote the biodegradation of the amines produced. The presence of aromatic amine in the microaerophilic stage and its absence in the aerobic stage demonstrate azo bond reduction and an oxidative biodegradation process, respectively. Total Organic Carbon (TOC) reduction for the growth medium plus dyes was ∼50% in the microaerophilic stage and ∼80% in the aerobic stage. The degradation products were also characterized by FT-IR and UV–vis techniques and their toxicity measured using Daphnia magna. The results provide evidence that the successive microaerophilic/aerobic stages, using a single Klebsiella sp. strain VN-31 in the same bioreactor, were able to form aromatic amines by the reductive break down of the azo bond and to oxidize them into non-toxic metabolites. | por |
dc.description.sponsorship | The authors would like to thank the Portuguese Foundation of Science and Technology (FCT) for providing the grant to Andrea Zille (SFRH/BPD/24238/2005) and the Brazilian Foundations for the Coordination of Training Graduated Pessoal of the Ministry of Education (CAPES) and the National Counsel for Technological and Scientific Development (CNPq) for providing the grant to Elisangela Franciscon. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier 1 | por |
dc.rights | openAccess | por |
dc.subject | Azo dyes | por |
dc.subject | Klebsiella sp | por |
dc.subject | Biodegradation | por |
dc.subject | Textile effluents | por |
dc.subject | Aromatic amine | por |
dc.subject | Toxicity | por |
dc.title | Microaerophilic–aerobic sequential decolourization/biodegradation of textile azo dyes by a facultative Klebsiella sp. strain VN-31 | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 446 | por |
oaire.citationEndPage | 452 | por |
oaire.citationIssue | 4 | por |
oaire.citationTitle | Process Biochemistry | por |
oaire.citationVolume | 44 | por |
dc.identifier.doi | 10.1016/j.procbio.2008.12.009 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Process Biochemistry | por |
Aparece nas coleções: | DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2009 Microaerophilic–aerobic sequential decolourization-biodegradation of textile....pdf | Microaerophilic–aerobic sequential decolourization/biodegradation of textile azo dyes by a facultative Klebsiella sp. strain VN-31 | 553,44 kB | Adobe PDF | Ver/Abrir |