Reduction of Chromium(VI) by Locally Isolated Pseudomonas sp. C-171

A strain of Pseudomonas sp. C-171 capable of tolerating hexavalent chromium (Cr +6 ) up to 2000 ppm as potassium dichromate was isolated from domestic sewage. The Cr +6 reduction was checked by growing the isolated strain in a medium containing potassium dichromate as Cr +6 source. The rate of growth of Pseudomonas sp. C-171 decreased with the increase in Cr +6 concentration of the medium. The maximum rate of chromium reduction was observed during the log phase of bacterium growth. The reduction of hexavalent chromium was inoculum concentration dependent. The accumulation of chromium hydroxide around the bacterial cells and slight elongation of cells were observed.

[1]  K. Chakraborty,et al.  Purification and Biochemical Characterization , 2008 .

[2]  W. Smith.  Hexavalent Chromium Reduction and Precipitation by Sulphate-reducing Bacterial Biofilms , 2001 .

[3]  Mujeeb-ur-Rahman,et al.  Removal of Hexavalent chromium by a consortium of bacteria isolated from domestic sewage , 2000 .

[4]  J. N. Petersen,et al.  Kinetics of Chromium Reduction by Mixed Cultures During Growth Phase , 2000 .

[5]  A. Shakoori,et al.  Hexavalent chromium reduction by a dichromate-resistant gram-positive bacterium isolated from effluents of tanneries , 2000, Applied Microbiology and Biotechnology.

[6]  T. Beveridge,et al.  Reduction of Cr(VI) by a Consortium of Sulfate-Reducing Bacteria (SRB III) , 1994, Applied and environmental microbiology.

[7]  Liu Fude,et al.  Microbial Removal and Recovery of Chromium (VI)From Electroplating Wastewater , 1993 .

[8]  S. Silver,et al.  Chromium reduction in Pseudomonas putida , 1990, Applied and environmental microbiology.

[9]  K. Toda,et al.  Membrane-associated chromate reductase activity from Enterobacter cloacae , 1990, Journal of bacteriology.

[10]  H. Ohtake,et al.  Cloning, nucleotide sequence, and expression of the chromate resistance determinant of Pseudomonas aeruginosa plasmid pUM505 , 1990, Journal of bacteriology.

[11]  H. Ohtake,et al.  Bacterial Reduction of Hexavalent Chromium: Kinetic Aspects of Chromate Reduction by Enterobacter cloacae HO1 , 1990 .

[12]  Tsukasa Mori,et al.  Isolation and Characterization of an Enterobacter cloacae Strain That Reduces Hexavalent Chromium under Anaerobic Conditions , 1989, Applied and environmental microbiology.

[13]  R. Barra,et al.  Purification and biochemical characterization of tellurite-reducing activities from Thermus thermophilus HB8 , 1988, Journal of bacteriology.

[14]  K. Nealson,et al.  Bacterial Manganese Reduction and Growth with Manganese Oxide as the Sole Electron Acceptor , 1988, Science.

[15]  S. Silver,et al.  Bacterial resistance and detoxification of heavy metals , 1984 .

[16]  H. Horitsu,et al.  Comparison of Characteristics of Hexavalent Chromium-tolerant Bacterium, Pseudomonas ambigua G-1, and Its Hexavalent Chromium-sensitive Mutant , 1983 .

[17]  A M Chakrabarty,et al.  Chromate resistance plasmid in Pseudomonas fluorescens , 1983, Journal of bacteriology.

[18]  K. Hunter,et al.  Reduction of chromium(VI) by bacterially produced hydrogen sulphide in a marine environment , 1981 .

[19]  S. Silver,et al.  Microbial transformations of metals. , 1978, Annual review of microbiology.

[20]  R. E. Buchanan,et al.  Bergey's Manual of Determinative Bacteriology. , 1975 .

[21]  H. H. Williams,et al.  Detection of Selenium Deposits in Escherichia coli by Electron Microscopy , 1974, Journal of bacteriology.

[22]  P. Urone.  Stability of Colorimetric Reagent for Chromium, s-Diphenylcarbazide, in Various Solvents , 1955 .

[23]  S. T. Cowan.  Bergey's Manual of Determinative Bacteriology , 1948, Nature.