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Changes in the microbial community during bioremediation of gasoline-contaminated soil
Leal, Aline Jaime; Rodrigues, Edmo Montes; Leal, Patrícia Lopes; Júlio, Aline Daniela Lopes; Fernandes, Rita de Cássia Rocha; Borges, Arnaldo Chaer; Tótola, Marcos Rogério.
Afiliação
  • Leal, Aline Jaime; Instituto Federal Sul-rio-grandense. Bagé. Brazil
  • Rodrigues, Edmo Montes; Universidade Federal de Viçosa. Departamento de Microbiologia. Laboratório de Biotecnologia Ambiental e Biodiversidade. Viçosa. Brazil
  • Leal, Patrícia Lopes; Universidade Federal de Viçosa. Departamento de Microbiologia. Laboratório de Biotecnologia Ambiental e Biodiversidade. Viçosa. Brazil
  • Júlio, Aline Daniela Lopes; Universidade Federal de Viçosa. Departamento de Microbiologia. Laboratório de Biotecnologia Ambiental e Biodiversidade. Viçosa. Brazil
  • Fernandes, Rita de Cássia Rocha; Universidade Federal de Viçosa. Departamento de Microbiologia. Laboratório de Biotecnologia Ambiental e Biodiversidade. Viçosa. Brazil
  • Borges, Arnaldo Chaer; Universidade Federal de Viçosa. Departamento de Microbiologia. Laboratório de Biotecnologia Ambiental e Biodiversidade. Viçosa. Brazil
  • Tótola, Marcos Rogério; Universidade Federal de Viçosa. Departamento de Microbiologia. Laboratório de Biotecnologia Ambiental e Biodiversidade. Viçosa. Brazil
Braz. J. Microbiol. ; 48(2): 342-351, abr.-jun. 2017. graf, tab
Article em En | VETINDEX | ID: vti-17545
Biblioteca responsável: BR68.1
Localização: BR68.1
ABSTRACT
We aimed to verify the changes in the microbial community during bioremediation of gasoline-contaminated soil. Microbial inoculants were produced from successive additions of gasoline to municipal solid waste compost (MSWC) previously fertilized with nitrogen-phosphorous. To obtain Inoculant A, fertilized MSWC was amended with gasoline every 3 days during 18 days. Inoculant B received the same application, but at every 6 days. Inoculant C included MSWC fertilized with NP, but no gasoline. The inoculants were applied to gasoline-contaminated soil at 10, 30, or 50 g/kg. Mineralization of gasoline hydrocarbons in soil was evaluated by respirometric analysis. The viability of the inoculants was evaluated after 103 days of storage under refrigeration or room temperature. The relative proportions of microbial groups in the inoculants and soil were evaluated by FAME. The dose of 50 g/kg of inoculants A and B led to the largest CO2 emission from soil. CO2 emissions in treatments with inoculant C were inversely proportional to the dose of inoculant. Heterotrophic bacterial counts were greater in soil treated with inoculants A and B. The application of inoculants decreased the proportion of actinobacteria and increased of Gram-negative bacteria. Decline in the density of heterotrophic bacteria in inoculants occurred after storage. This reduction was bigger in inoculants stored at room temperature. The application of stored inoculants in gasoline-contaminated soil resulted in a CO2 emission twice bigger than that observed in uninoculated soil. We concluded that MSWC is an effective material for the production of microbial inoculants for the bioremediation of gasoline-contaminated soil.(AU)
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Texto completo: 1 Base de dados: VETINDEX Assunto principal: Solo / Microbiologia do Solo / Gasolina Idioma: En Revista: Braz. J. Microbiol. Ano de publicação: 2017 Tipo de documento: Article
Texto completo
Adicionar na Minha BVS
Imprimir
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Texto completo: 1 Base de dados: VETINDEX Assunto principal: Solo / Microbiologia do Solo / Gasolina Idioma: En Revista: Braz. J. Microbiol. Ano de publicação: 2017 Tipo de documento: Article