Kinetics of chromium (VI) reduction by a type strain Shewanella alga under different growth conditions

Guha, Hillol; Jayachandran, Krish; Maurrasse, F. J.

doi:10.1016/s0269-7491(01)00108-7

Cited by 99 publications

(46 citation statements)

References 25 publications

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“…CFU were enumerated after a 24-h incubation at 30°C. The Cr(VI) concentration was determined using a previously reported colorimetric method (33). A 1.6-ml outlet sample was filtered through a 0.22-m syringe filter and mixed with 0.2 ml of 0.5 g/liter s-diphenylcarbazide in 10% methanol-12.5 mM H 2 SO 4 followed by OD 540 measurement after a 20-min incubation.…”

Section: Methodsmentioning

confidence: 99%

Disruption of Putrescine Biosynthesis in Shewanella oneidensis Enhances Biofilm Cohesiveness and Performance in Cr(VI) Immobilization

Ding

Peng

et al. 2014

Appl Environ Microbiol

109

159

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Although biofilm-based bioprocesses have been increasingly used in various applications, the long-term robust and efficient biofilm performance remains one of the main bottlenecks. In this study, we demonstrated that biofilm cohesiveness and performance of Shewanella oneidensis can be enhanced through disrupting putrescine biosynthesis. Through random transposon mutagenesis library screening, one hyperadherent mutant strain, CP2-1-S1, exhibiting an enhanced capability in biofilm formation, was obtained. Comparative analysis of the performance of biofilms formed by S. oneidensis MR-1 wild type (WT) and CP2-1-S1 in removing dichromate (Cr 2 O 7 2؊ ), i.e., Cr(VI), from the aqueous phase showed that, compared with the WT biofilms, CP2-1-S1 biofilms displayed a substantially lower rate of cell detachment upon exposure to Cr(VI), suggesting a higher cohesiveness of the mutant biofilms. In addition, the amount of Cr(III) immobilized by CP2-1-S1 biofilms was much larger, indicating an enhanced performance in Cr(VI) bioremediation. We further showed that speF, a putrescine biosynthesis gene, was disrupted in CP2-1-S1 and that the biofilm phenotypes could be restored by both genetic and chemical complementations. Our results also demonstrated an important role of putrescine in mediating matrix disassembly in S. oneidensis biofilms.

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Section: Methodsmentioning

confidence: 99%

Disruption of Putrescine Biosynthesis in Shewanella oneidensis Enhances Biofilm Cohesiveness and Performance in Cr(VI) Immobilization

Ding

Peng

et al. 2014

Appl Environ Microbiol

109

159

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“…Numerous studies have demonstrated a reduction of toxic Cr(VI) to non-toxic Cr(III) by various types of bacteria under both aerobic and anaerobic conditions (Guha et al 2001b). In all these studies Cr(VI) was the electron acceptor.…”

Section: Transport and Redox Reactionsmentioning

confidence: 99%

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides. 3. Influence of Chemical Speciation and Bioavailability on Contaminants Immobilization/Mobilization Bio-processes

Hullebusch

Lens

Tabak

2005

Rev Environ Sci Biotechnol

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The biotransformation of metals is an exciting, developing strategy to treat metal contamination, especially in environments that are not accessible to other remediation technologies. However, our ability to benefit from these strategies hinges on our ability to monitor these transformations in the environment. That's why remediation of contaminated sediments and soil requires detailed in situ characterization of the speciation of the toxic substances and their transformations with respect to time and spatial distribution. The present paper gives an overview of the literature regarding research performed in the laboratory as well as in the field.

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“…[11] Enterobacter aerogenes, [12] Enterobacter cloacae, [13][14][15][16] Microbacterium, [17] Desulfovibrio, [18] Escherichia coli, [19] Shewanella alga, [20] Bacillus sp. [8] and several other bacterial species.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of hexavalent chromium (VI) by a soil-borne bacterium,Enterobacter cloacaeB2-DHA

Rahman

Nahar

Nawani³

et al. 2015

Journal of Environmental Science and Health, Part A

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Bioremediation of hexavalent chromium (VI) by a soil borne bacterium, Enterobacter cloacae B2-DHA. Journal of Environmental Science and Health. Part A: Toxic/Hazardous Substances andEnvironmental Engineering, 50 (11) AbstractChromium and chromium containing compounds are discharged into the nature as waste from anthropogenic activities, such as industries, agriculture, forest farming, mining and metallurgy. Continued disposal of these compounds to the environment leads to development of various lethal diseases in both humans and animals. In this paper, we report a soil borne bacterium, B2-DHA that can be used as a vehicle to effectively remove chromium from the contaminated sources. B2-DHA is resistant to chromium with a MIC value of 1000 µg/mL has the potential to reduce chromium significantly to safe levels from the contaminated environments and suggest the potential use of this bacterium in reducing human exposure to chromium, hence avoiding poisoning.

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Kinetics of chromium (VI) reduction by a type strain Shewanella alga under different growth conditions

Cited by 99 publications

References 25 publications

Disruption of Putrescine Biosynthesis in Shewanella oneidensis Enhances Biofilm Cohesiveness and Performance in Cr(VI) Immobilization

Disruption of Putrescine Biosynthesis in Shewanella oneidensis Enhances Biofilm Cohesiveness and Performance in Cr(VI) Immobilization

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides. 3. Influence of Chemical Speciation and Bioavailability on Contaminants Immobilization/Mobilization Bio-processes

Bioremediation of hexavalent chromium (VI) by a soil-borne bacterium,Enterobacter cloacaeB2-DHA

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