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https://hdl.handle.net/1822/44364
Título: | Potential of the filamentous fungus Aspergillus niger AN 400 to degrade Atrazine in wastewaters |
Autor(es): | Silva, G. Barbosa, B. C. A. Rodrigues, K. Aquino, M. Pereira, Luciana |
Palavras-chave: | Allium test Aspergillus niger Atrazine Biodegradation Glucose Substrate competition kinetics |
Data: | 2017 |
Editora: | Elsevier B.V. |
Revista: | Biocatalysis and Agricultural Biotechnology |
Citação: | Silva, G.; Barbosa, B. C. A.; Rodrigues, K.; Aquino, M.; Pereira, Luciana, Potential of the filamentous fungus Aspergillus niger AN 400 to degrade Atrazine in wastewaters. Biocatalysis and Agricultural Biotechnology, 9, 162-167, 2017 |
Resumo(s): | This research aims to evaluate the ability of the fungal specie Aspergillus niger AN 400 to metabolize atrazine (ATZ) in model wastewaters, as most of the research with this worldwide used herbicide is focused on bacteria and on soil bioremediation. Firstly, the tolerance of A. niger for ATZ was evaluated in petri dishes. A. niger growth in all the tested ATZ concentrations, up to 30 mg L1. Biodegradation of ATZ was then conducted in batch reactors of 3 L, with dispersed fungal biomass. Reactors were operated for 8 days at different conditions: without glucose (RG0) and glucose at concentrations of 0.5; 1.0; 2.0; 3.0; 4.0 and 5.0 g L1 - RG0.5; RG1; RG2; RG3; RG4 and RG5, respectively. Control (RC) includes a reactor in the absence of fungal spores. The highest ATZ removal, 72%, occurred in RG3. At higher glucose concentration, substrate competition kinetics may be the responsible for the decrease of biodegradation rate constants. Only 50% of Chemical Oxygen Demand (COD) removal was obtained due to the presence of methanol used to dissolve ATZ, which has contributed for most of the COD in reactors. Detoxification of the ATZ solution by the biological treatment was observed by the Allium test. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/44364 |
DOI: | 10.1016/j.bcab.2016.12.013 |
ISSN: | 1878-8181 |
Versão da editora: | https://www.journals.elsevier.com/biocatalysis-and-agricultural-biotechnology |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_46523_1.pdf | 606,86 kB | Adobe PDF | Ver/Abrir |