Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/218950 |
Resumo: | The fungi Aspergillus fumigatus, Hormoconis resinae and Candida silvicola were isolated from the fuel/water interfacial biomass in diesel storage tanks in Brazil. Their corrosive activities on mild steel ASTM A 283-93-C, used in storage tanks for urban diesel, were evaluated after various times of incubation at 30 C in a modified Bushnell– Haas mineral medium (without chlorides) with diesel oil as sole source of carbon. Their ability to degrade diesel oil was evaluated after growth for 30 and 60 days. The fungus Aspergillus fumigatus and the consortium of all three organisms showed the highest production of biomass; A. fumigatus gave the greatest value for steel weight loss and produced the greatest reduction in pH of the aqueous phase. Solid phase microextraction (SPME) showed that the main acid present in the aqueous phase after 60 days incubation with A. fumigatus was propionic acid. Polarization curves indicated that microbial activity influenced the anodic process, probably by the production of corrosive metabolites, and that this was particularly important in the case of A. fumigatus. This fungus preferentially degraded aliphatic hydrocarbons of chain lengths C11AC13 in the diesel, producing 47.7, 37.5 and 51% reductions in C11, C12 and C13, respectively. It produced more degradation than the consortium after 60 days incubation. It is likely that the presence of other species in the consortium inhibited the growth of A. fumigatus, thus resulting in a lower rate of diesel fuel degradation. |
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Bento, Fatima MenezesBeech, Iwona BoguslavaGaylarde, Christine ClaireHidalgo, Gelsa Edith NavarroMuller, Iduvirges Lourdes2021-03-17T04:18:34Z2005http://hdl.handle.net/10183/218950000482093The fungi Aspergillus fumigatus, Hormoconis resinae and Candida silvicola were isolated from the fuel/water interfacial biomass in diesel storage tanks in Brazil. Their corrosive activities on mild steel ASTM A 283-93-C, used in storage tanks for urban diesel, were evaluated after various times of incubation at 30 C in a modified Bushnell– Haas mineral medium (without chlorides) with diesel oil as sole source of carbon. Their ability to degrade diesel oil was evaluated after growth for 30 and 60 days. The fungus Aspergillus fumigatus and the consortium of all three organisms showed the highest production of biomass; A. fumigatus gave the greatest value for steel weight loss and produced the greatest reduction in pH of the aqueous phase. Solid phase microextraction (SPME) showed that the main acid present in the aqueous phase after 60 days incubation with A. fumigatus was propionic acid. Polarization curves indicated that microbial activity influenced the anodic process, probably by the production of corrosive metabolites, and that this was particularly important in the case of A. fumigatus. This fungus preferentially degraded aliphatic hydrocarbons of chain lengths C11AC13 in the diesel, producing 47.7, 37.5 and 51% reductions in C11, C12 and C13, respectively. It produced more degradation than the consortium after 60 days incubation. It is likely that the presence of other species in the consortium inhibited the growth of A. fumigatus, thus resulting in a lower rate of diesel fuel degradation.application/pdfengWorld journal of microbiology and biotechnology. Dordrecht, Holanda. Vol. 21, no. 2 (Mar. 2005), p. 135-142Óleo dieselBiodegradaçãoBiocorrosãoAspergillus fumigatusBiocorrosionBiodegradationDiesel oilMild steelPropionic acidStorage tanksDegradation and corrosive activities of fungi in a diesel-mild steel-aqueous systemEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT000482093.pdf.txt000482093.pdf.txtExtracted Texttext/plain32458http://www.lume.ufrgs.br/bitstream/10183/218950/2/000482093.pdf.txtf1ef926f9eae3f1ac58821ea6a376066MD52ORIGINAL000482093.pdfTexto completo (inglês)application/pdf600022http://www.lume.ufrgs.br/bitstream/10183/218950/1/000482093.pdf4748fd78e8221c44c0eaa68c9ab78be0MD5110183/2189502021-06-26 04:38:16.888146oai:www.lume.ufrgs.br:10183/218950Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-06-26T07:38:16Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
title |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
spellingShingle |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system Bento, Fatima Menezes Óleo diesel Biodegradação Biocorrosão Aspergillus fumigatus Biocorrosion Biodegradation Diesel oil Mild steel Propionic acid Storage tanks |
title_short |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
title_full |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
title_fullStr |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
title_full_unstemmed |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
title_sort |
Degradation and corrosive activities of fungi in a diesel-mild steel-aqueous system |
author |
Bento, Fatima Menezes |
author_facet |
Bento, Fatima Menezes Beech, Iwona Boguslava Gaylarde, Christine Claire Hidalgo, Gelsa Edith Navarro Muller, Iduvirges Lourdes |
author_role |
author |
author2 |
Beech, Iwona Boguslava Gaylarde, Christine Claire Hidalgo, Gelsa Edith Navarro Muller, Iduvirges Lourdes |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Bento, Fatima Menezes Beech, Iwona Boguslava Gaylarde, Christine Claire Hidalgo, Gelsa Edith Navarro Muller, Iduvirges Lourdes |
dc.subject.por.fl_str_mv |
Óleo diesel Biodegradação Biocorrosão |
topic |
Óleo diesel Biodegradação Biocorrosão Aspergillus fumigatus Biocorrosion Biodegradation Diesel oil Mild steel Propionic acid Storage tanks |
dc.subject.eng.fl_str_mv |
Aspergillus fumigatus Biocorrosion Biodegradation Diesel oil Mild steel Propionic acid Storage tanks |
description |
The fungi Aspergillus fumigatus, Hormoconis resinae and Candida silvicola were isolated from the fuel/water interfacial biomass in diesel storage tanks in Brazil. Their corrosive activities on mild steel ASTM A 283-93-C, used in storage tanks for urban diesel, were evaluated after various times of incubation at 30 C in a modified Bushnell– Haas mineral medium (without chlorides) with diesel oil as sole source of carbon. Their ability to degrade diesel oil was evaluated after growth for 30 and 60 days. The fungus Aspergillus fumigatus and the consortium of all three organisms showed the highest production of biomass; A. fumigatus gave the greatest value for steel weight loss and produced the greatest reduction in pH of the aqueous phase. Solid phase microextraction (SPME) showed that the main acid present in the aqueous phase after 60 days incubation with A. fumigatus was propionic acid. Polarization curves indicated that microbial activity influenced the anodic process, probably by the production of corrosive metabolites, and that this was particularly important in the case of A. fumigatus. This fungus preferentially degraded aliphatic hydrocarbons of chain lengths C11AC13 in the diesel, producing 47.7, 37.5 and 51% reductions in C11, C12 and C13, respectively. It produced more degradation than the consortium after 60 days incubation. It is likely that the presence of other species in the consortium inhibited the growth of A. fumigatus, thus resulting in a lower rate of diesel fuel degradation. |
publishDate |
2005 |
dc.date.issued.fl_str_mv |
2005 |
dc.date.accessioned.fl_str_mv |
2021-03-17T04:18:34Z |
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Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/218950 |
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000482093 |
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dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
World journal of microbiology and biotechnology. Dordrecht, Holanda. Vol. 21, no. 2 (Mar. 2005), p. 135-142 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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