Changes in the microbial community during bioremediation of gasoline-contaminated soil

dc.creatorLeal, Aline Jaime
dc.creatorRodrigues, Edmo Montes
dc.creatorLeal, Patrícia Lopes
dc.creatorJúlio, Aline Daniela Lopes
dc.creatorFernandes, Rita de Cássia Rocha
dc.creatorBorges, Arnaldo Chaer
dc.creatorTótola, Marcos Rogério
dc.date2017-10-26T16:02:35Z
dc.date2017-10-26T16:02:35Z
dc.date2016-12-19
dc.date.accessioned2023-09-27T21:03:02Z
dc.date.available2023-09-27T21:03:02Z
dc.identifier15178382
dc.identifierhttps://doi.org/10.1016/j.bjm.2016.10.018
dc.identifierhttp://www.locus.ufv.br/handle/123456789/12460
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8953561
dc.descriptionWe 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 N–P, 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.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherBrazilian Journal of Microbiology
dc.relationVolume 48, Issue 2, Pages 342-351, April–June 2017
dc.rightsOpen Access
dc.subjectBioremediation
dc.subjectGasoline degradation
dc.subjectSoil contamination
dc.subjectMicrobial inoculants
dc.subjectInoculant storage
dc.titleChanges in the microbial community during bioremediation of gasoline-contaminated soil
dc.typeArtigo


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