Sonoassisted Microbial Reduction of Chromium

Kathiravan, Mathur Nadarajan; Karthick, R.; Muthu, Naggapan; Muthukumar, Karuppan; Velan, M.

doi:10.1007/s12010-009-8716-7

Cited by 43 publications

(18 citation statements)

References 31 publications

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“…Microbes with higher resistance or tolerance to Cr(VI) are the potential candidate for detoxification of Cr(VI). A wide array of bacteria belonging to several genera Aceinetobacter, Serratia, Bacillus, Pantoea, Pseudomonas, Staphylococcus, Cellulomonas, Achromobacter, Micrococcus, Escherichia, Ochrobactrum, isolated from chromium contaminated sites, have shown biotransformation especially reduction of Cr(VI) to relatively nontoxic Cr(III) (Mishra et al, 2010;Kathiravan et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Exploration of NPK Activity Showing Chromium Resistant Bacteria from Sukinda Mining Area

Pattnaik¹,

Dash²,

Samantaray³

2017

Int.J.Curr.Microbiol.App.Sci

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Section: Introductionmentioning

confidence: 99%

Exploration of NPK Activity Showing Chromium Resistant Bacteria from Sukinda Mining Area

Pattnaik¹,

Dash²,

Samantaray³

2017

Int.J.Curr.Microbiol.App.Sci

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“…Widely reported Cr(VI) reducing microorganisms in the literature include Bacillus sp. [8][9][10], Pannonibacter phragmitetus [11], Ochrobactrum sp. [12], Arthrobacter rhombi [13], Leucobactor sp.…”

Section: Introductionmentioning

confidence: 99%

Ex situ bioremediation of Cr(VI) contaminated soil by Bacillus sp.: Batch and continuous studies

Kathiravan

Karthick

Muthukumar

2011

Chemical Engineering Journal

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109

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“…Metal-resistant microorganisms are often presented in contaminated soils [50][51][52][53][54][55]. These bacteria are already well adapted to the local environment and they will likely have a competitive advantage over allochthonous strains if introduced for bioremediation.…”

Section: Discussionmentioning

confidence: 99%

“…Both ChrR and NfsA are cytoplasmic proteins and strain LZ-01 may have a similar mechanism for the reduction of these metals. Desulfovibrio desulfuricans G20 is also known to tolerate Cr(VI), U(VI) and As(V) with a common mechanism for both Cr(VI) and U(VI) reduction [36,49].Metal-resistant microorganisms are often presented in contaminated soils [50][51][52][53][54][55]. These bacteria are already well adapted to the local environment and they will likely have a competitive advantage over allochthonous strains if introduced for bioremediation.…”

mentioning

confidence: 99%

A Novel Subspecies of Staphylococcus aureus from Sediments of Lanzhou Reach of the Yellow River Aerobically Reduces Hexavalent Chromium

Zhang¹,

Krumholz²,

Yu³

et al. 2013

J Bioremed Biodeg

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Background: Lanzhou reach of the Yellow River is contaminated by heavy metals including chromium perennially. The microbial community within the sediment is very active. Yet the study on the bacteria in this distinctive microbial community is still scarce.Results: LZ-01, a Gram-positive hexavalent chromium-reducing bacterium was isolated from the soil sample collected at a petrochemical corporation wastewater discharge site of Lanzhou reach. It was able to aerobically reduce 94.5% of 0.4 mM Cr (VI) to Cr(III) in 120 hours. Cd (II) and NaN 3 treatment both repressed Cr(VI) reduction in LZ-01 and Cr(III) precipitates were detected both on the cell membrane and in the cytoplasm by Transmission Electron Microscopy (TEM) imaging. LZ-01 also demonstrated resistance to 4 mM As (V) and 9 mM U (VI). LZ-01 was closely related to Staphylococcus aureus revealed by 16S rRNA sequence analysis. Comparison of cellular fatty acid components and Vitek phenotype identification provided further evidences that LZ-01 is a novel subspecies of S. aureus. Conclusions:A chromate-reducing bacterium LZ-01 identified as a novel subspecies of S. aureus was isolated from Lanzhou reach of the Yellow River. Cd (II) and NaN 3 treatment and TEM images suggested that Cr(VI) was reduced not only intracellularly but also on the cell membrane. All the results indicate that the isolate has a great potential for bioremediation of Cr (VI)-contaminated environment. Staphylococcus aureus is a facultative Gram-positive coccus-shaped bacterium [27] that is best known for its ability to cause a range of illnesses [27,28]. Several recent studies report that S. aureus is involved in environmental metal remediation [4,29] and S. epidermidis which is closely related to S. aureus is able to anaerobically reduce Cr(VI) to Cr (III) [11]. However, there is no direct evidence that S. aureus can reduce Cr(VI). In this study, we screened the Lanzhou reach river bank soil for Cr(VI) reducers and isolated a novel subspecies of S. aureus strain LZ-01, which reduces Cr(VI) to Cr(III) aerobically. 16S rRNA sequencing and fatty lipids profiling showed that strain LZ-01 is closely related to S. aureus. Comparison of Vitek phenotype identification showed that there were 7 different reactions out of 64 between LZ-01 and type strains of Staphylococcus aureus. LZ-01 reduces Cr(VI) in a highly efficient manner suggesting that it may be useful for Cr(VI) reduction studies in Lanzhou reach. Journal of Bior emediation & Biodegradation Materials and Methods Soil sample collectionThe sampling site was 60 kilometers west of central Lanzhou city and adjacent to the upper reach of the Yellow River. The actual location was close to a petrochemical corporation waste water discharge site. The latitude and longitude of the sampling site is 36°06'N 103°39'E, (Figure 1). The pH of soils at the sampling site ranged from 5.0 to 6.0 with temperature around 18°C at the time of collection. The soil samples were collected from 15 cm below surface horizon and stored in sterile aluminum boxes a...

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Sonoassisted Microbial Reduction of Chromium

Cited by 43 publications

References 31 publications

Exploration of NPK Activity Showing Chromium Resistant Bacteria from Sukinda Mining Area

Exploration of NPK Activity Showing Chromium Resistant Bacteria from Sukinda Mining Area

Ex situ bioremediation of Cr(VI) contaminated soil by Bacillus sp.: Batch and continuous studies

A Novel Subspecies of Staphylococcus aureus from Sediments of Lanzhou Reach of the Yellow River Aerobically Reduces Hexavalent Chromium

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