Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/15614
Título: Potential of Bacterial Isolates from a Stream in Manaus-Amazon to Bioremediate Chromium-Contaminated Environments
Autor: Teles, Ydrielly Veras
Castro, Lorena Mota de
Junior, Ézio Sargentini
do Nascimento, Aryana Pinheiro
Silva, Henrique Alves da
Costa, Rebeca Silveira
do Nascimento Souza, Rayane Delmontes
Mota, Adolfo José da
Pereira, José Odair
Palavras-chave: Bacteria
Bacteriology
Biodegradation
Bioremediation
Biotechnology
Effluents
River Pollution
Water Quality
Amazonian Stream
Bacterial Isolates
Bioremediation Potentials
Contaminated Environment
Diphenylcarbazide Methods
Hexavalent Chromium
Industrial Area
Vagococcus Sp
Chromium Compounds
Chromium
Diphenylcarbazide
Bacterium
Biodegradation
Bioremediation
Chromium
Industrial District
Isolated Population
Stream
Acidovorax
Acinetobacter
Alicycliphilus
Bacillus
Bacterium Isolate
Bioremediation
Comamonas
Concentration (parameters)
Controlled Study
Effluent
Enterobacter
Gene Sequence
Incubation Time
Limit Of Quantitation
Micrococcus
Nonhuman
Proteobacteria
Proteus
Serratia
Vagococcus
Water Pollution
Water Quality
Amazonas
Manaus
Bacteria (microorganisms)
Vagococcus
Data do documento: 2018
Revista: Water, Air, and Soil Pollution
Encontra-se em: Volume 229, Número 8
Abstract: Igarapé do Quarenta (IgQ), a stream located in the Manaus-AM, BR, has directly experienced the impacts of urban expansion over the last five decades, which contributed for its contamination. As an affluent of Rio Negro, IgQ also affects the water quality of this important river that bathes Manaus. However, the stress caused by the prolonged exposition to chemical agents may have selected microorganisms that exhibit great bioremediation potential. In the present study, bacteria isolated from four distinct sites of the IgQ were identified, and their potential to degrade hexavalent chromium (Cr(VI)) was investigated using the s-diphenylcarbazide method. Among the investigated isolates, 14 exhibited resistance against Cr(VI) at a concentration of 300 mg/L and eight isolates reduced over 50% (53.5–97.4%) chromium ratios after 72 h of incubation. Those isolates were identified by gene sequencing and classified in 10 genera (Acidovorax sp., Acinetobacter sp., Alicycliphilus sp., Bacillus sp., Comamonas sp., Enterobacter sp., Micrococcus sp., Proteus sp., Serratia sp., and Vagococcus sp.). Under control conditions, the isolate of Vagococcus sp. genus, in only 24 h of incubation, reduced 96.8% of the rate of Cr(VI) added to the culture medium at the concentration of 10 mg/L. Obtained results indicate that the Vagococcus sp. exhibits a great potential to be used in the bioremediation of areas contaminated with chromium. The mechanisms of action of microorganisms should be investigated for more specific applications in the decontamination of effluents and direct use of its by-products to bioremediate polluted environments. © 2018, The Author(s).
DOI: 10.1007/s11270-018-3903-1
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