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Strategies for the bioremediation of azo dyes containing wastewaters

Detalhes bibliográficos
Autor(a) principal: Pereira, Luciana
Data de Publicação: 2010
Outros Autores: Pereira, Raquel, Alves, M. M.
Idioma: eng
Título da fonte: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Texto Completo: http://hdl.handle.net/1822/27365
Resumo: Publicado em "Book of abstracts of the 2nd Meeting of the Institute for Biotechnololgy and Bioengineering"
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spelling Strategies for the bioremediation of azo dyes containing wastewatersPublicado em "Book of abstracts of the 2nd Meeting of the Institute for Biotechnololgy and Bioengineering"Azo dyes are an important class of wastewater pollutants resulted especially from textile industry. Biological treatment based on the anaerobic azo bound reductive cleavage, followed by a second step for the transformation of the resulted aromatic amines, seems promising. In our studies, the surface chemistry of a commercial activated carbon (AC) was selectively modified by chemical oxidation and thermal treatments and tested as a natural redox mediator on chemical and biological anaerobic azo dye reduction [1]. Batch experiments with 0.1 g L−1AC demonstrated an increase of the first-order rates, up to 9-fold, as compared with assays without AC. Thermal treated samples gave better results due to their positively charged surface, favouring electrostatic attraction between the carbon and the anionic dyes tested. The low amount of AC used and the positive results demonstrated, constitutes a significant breakthrough in the field of redox mediated processes which will certainly open new perspectives for wastewater treatment processes. In order to investigate the fate of aromatic amines, two UASB reactors were operated under denitrifying conditions: R1 contained nitrate and R2 a nitrate and nitrite mixture as terminal electron acceptors [2]. The R1 results demonstrated that aniline could be degraded under denitrifying conditions while sulfanilic acid remains. The presence of nitrite in the influent of R2, caused a chemical reaction that led to immediate disappearance of both aromatic amines and the formation of an intense yellow solution. Based on the HPLC-MS analysis, the structures of possible products were proposed. Denitrification activity tests suggest some detoxification.Universidade do Minho. Centro de Engenharia Biológica (CEB)Departamento de Engenharia Biológica da Universidade do MinhoUniversidade do MinhoPereira, LucianaPereira, RaquelAlves, M. M.20102010-01-01T00:00:00Zconference objectinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/1822/27365eng978-972-97810-6-3info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2024-05-11T04:08:39Zoai:repositorium.sdum.uminho.pt:1822/27365Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T14:40:44.931988Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Strategies for the bioremediation of azo dyes containing wastewaters
title Strategies for the bioremediation of azo dyes containing wastewaters
spellingShingle Strategies for the bioremediation of azo dyes containing wastewaters
Pereira, Luciana
title_short Strategies for the bioremediation of azo dyes containing wastewaters
title_full Strategies for the bioremediation of azo dyes containing wastewaters
title_fullStr Strategies for the bioremediation of azo dyes containing wastewaters
title_full_unstemmed Strategies for the bioremediation of azo dyes containing wastewaters
title_sort Strategies for the bioremediation of azo dyes containing wastewaters
author Pereira, Luciana
author_facet Pereira, Luciana
Pereira, Raquel
Alves, M. M.
author_role author
author2 Pereira, Raquel
Alves, M. M.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Pereira, Luciana
Pereira, Raquel
Alves, M. M.
description Publicado em "Book of abstracts of the 2nd Meeting of the Institute for Biotechnololgy and Bioengineering"
publishDate 2010
dc.date.none.fl_str_mv 2010
2010-01-01T00:00:00Z
dc.type.driver.fl_str_mv conference object
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/27365
url http://hdl.handle.net/1822/27365
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 978-972-97810-6-3
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade do Minho. Centro de Engenharia Biológica (CEB)
Departamento de Engenharia Biológica da Universidade do Minho
publisher.none.fl_str_mv Universidade do Minho. Centro de Engenharia Biológica (CEB)
Departamento de Engenharia Biológica da Universidade do Minho
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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