Potential of Bacterial Isolates from a Stream in Manaus-Amazon to Bioremediate Chromium-Contaminated Environments

Water, Air, and Soil Pollution
Ydrielly Veras TelesJosé Odair Pereira

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 ...Continue Reading

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Citations

Jan 21, 2019·Journal of Applied Microbiology·C J Solís-González, H Loza-Tavera
Jan 8, 2021·Environmental Science and Pollution Research International·Yucai LyuYaoping Zhang
Mar 11, 2021·Environmental Science and Pollution Research International·Jia Chen, Yongqiang Tian

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Methods Mentioned

BETA
PCR

Software Mentioned

BLASTn
BLASTn ( Basic Local Alignment Search Tool )
BioNJ
OriginPro

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