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- W2025690303 abstract "The current study aimed to isolate and characterize a chromate-resistant bacterium from tannery effluent, able to reduce Cr(VI) aerobically at high pH and salinity. Environmental contamination by hexavalent chromium, Cr(VI), presents a serious public health problem. Enrichment led to the isolation of 12 bacteria displaying different degrees of chromate reduction. Phenotypic characterization and phylogenetic analysis based on 16S rDNA sequence comparison indicated that the most potent strain belonged to the genus Halomonas. The new strain designated as Halomonas sp. M-Cr was able to reduce 82% of 50 mg L−1 Cr(VI) in 48 h, concomitant with discolouring of yellow colour of the medium and formation of white insoluble precipitate of Cr(III). It exhibited growth up to 3500 mg L−1 Cr(VI), 20% NaCl and showed strong Cr(VI) reduction under alkaline condition, pH 10. Scanning electron microscopy revealed precipitation of chromium hydroxide on bacterial cell surfaces, which showed characteristic peak of chromium in energy-dispersive X-ray analysis. Plackett–Burman design was used to evaluate the influence of related parameters for enhancing Cr(VI) reduction. Glucose, yeast extract and KH2PO4 were confirmed as significant variables in the medium. Data suggest Halomonas sp. M-Cr as a promising candidate for bioremediation of Cr(VI) contaminated effluents particularly in saline and alkaline environments. Up to our knowledge, this is the first report on isolation of haloalkaliphilic Halomonas sp. from tannery effluent." @default.
- W2025690303 created "2016-06-24" @default.
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- W2025690303 creator A5053947390 @default.
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- W2025690303 date "2014-07-04" @default.
- W2025690303 modified "2023-09-24" @default.
- W2025690303 title "Hexavalent chromium reduction by chromate-resistant haloalkaliphilic<i>Halomonas</i>sp. M-Cr newly isolated from tannery effluent" @default.
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- W2025690303 doi "https://doi.org/10.1080/13102818.2014.937092" @default.
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