Reduction of Cr(VI) by indigenous bacteria in Cr-contaminated sediment under aerobic condition

Lee, S.E.; Lee, J.-U.; Chon, Hyo‐Taek; Lee, J.S.

doi:10.1016/j.gexplo.2007.04.005

Cited by 23 publications

(7 citation statements)

References 12 publications

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“…Enriched cultures of indigenous bacteria isolated from a stream sediment contaminated by a pigment manufacturing industry reduced 31% of the 250 lM Cr(VI), which is equivalent to the exchangeable Cr(VI) concentration in the sediment. The removal efficiency was increased with external supply of electron donor in the form of glucose, lactate or acetate (Lee et al 2008).…”

Section: Bacterial Cr(vi) Reductionmentioning

confidence: 99%

Remediation of chromium contaminants using bacteria

Kanmani¹,

Aravind²,

Preston

2011

Int. J. Environ. Sci. Technol.

125

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Chromium contaminants emanating from industrial activities pose a significant threat to human's wellbeing. Chromium (III) and Chromium (VI) are the forms in which they are commonly encountered, of which the trivalent form is relatively benign. Hence, biological reduction of hexavalent chromium has been widely explored by researchers, yielding fruitful outcomes, opening up exciting avenues and also throwing up new challenges. This article attempts to review this area of research. Microbes, especially bacteria capable of Chromium (VI) reduction, belonging to a heterogeneous group have been isolated from contaminated sites. They exhibit plasmid-mediated chromate resistance and the reduction is enzymatically mediated. Reduction studies have been carried out with free and immobilized enzymes as well as whole cells. Experiments have been carried out in specifically designed bioreactors operated in batch and continuous modes. Although significant progress has been made, much needs to be done for its successful in situ application as the organism may not withstand the Chromium concentration or may be impeded by the presence of other toxicants. With molecular engineering, it may be possible to derive strains with improved performance even under stressful field conditions.

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Section: Bacterial Cr(vi) Reductionmentioning

confidence: 99%

Remediation of chromium contaminants using bacteria

Kanmani¹,

Aravind²,

Preston

2011

Int. J. Environ. Sci. Technol.

125

View full text Add to dashboard Cite

show abstract

“…Glucose has been used as a substrate to produce electron donor (e.g. NADH) to conduct chromate reduction in many studies [28,29]. As the affinity of glucose is higher than that of AO7 to the chromate reductase of B. casei, glucose is preferred by the bacterium as for producing electron donor when both glucose and AO7 are available.…”

Section: Explanation Of the Unexpected Resultsmentioning

confidence: 99%

Simultaneous chromate reduction and azo dye decolourization by Brevibacterium casei: Azo dye as electron donor for chromate reduction

Cai

Wong

et al. 2010

Journal of Hazardous Materials

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“…6(a). Cr(VI) concentrations in wells located on the downstream side (in wells [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] are shown in Fig. 6(b).…”

Section: Two Injection Wellsmentioning

confidence: 99%

“…Several studies have been conducted on biotransformation of Cr(VI) to Cr(III) under various environmental conditions [7][8][9][10][11][12][13][14]. Many earlier studies on the fate and transport of Cr(VI) in aquifers focussed on understanding the interplay between the advection, dispersion, adsorption and geo-chemical processes [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%