Journal of Mining / 2014 / Article / Tab 2

Research Article

Reduction of Hexavalent Chromium by Viable Cells of Chromium Resistant Bacteria Isolated from Chromite Mining Environment

Table 2

Effect of cell density on Cr(VI) reduction by viable cells of Arthrobacter sp. SUK 1201.

Incubation, hr% Cr(VI) reduced
Cell density (cells/mL)

125.40 ± 1.214.1 ± 2.620.0 ± 1.041.2 ± 1.666.0 ± 1.4
2419.0 ± 0.824.0 ± 1.630.0 ± 1.864.2 ± 2.676.0 ± 0.9
4834.0 ± 2.248.1 ± 0.675.0 ± 1.0100 ± 0.6100 ± 0.4

(Cr(VI) reduction was carried out in V. B. broth containing 100 µM Cr(VI) and a cell density ranging from 106–1010 cells/mL. Incubation: 48 h at 25°C under continuous shaking (120 rpm). Residual Cr(VI) was estimated by usual diphenylcarbazide method. Results represent mean of triplicate experiments ± standard error).