Journal of Mining / 2014 / Article / Tab 3

Research Article

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

Table 3

Effect of metal ions on chromate reduction by viable cells of Arthrobacter sp. SUK 1201.

Incubation, hr% Cr(VI) reduced
Metal ions, 100 µM
Control (-Additional metal ions)Cu(II)Ni(II)Co(II)Mn(II)Zn(II)

1246.2 ± 1.881.4 ± 3.244.1 ± 2.653.0 ± 2.054.1 ± 0.648.0 ± 0.4
2460.2 ± 2.6100 ± 0.853.0 ± 1.657.0 ± 0.860.0 ± 1.657.0 ± 1.9
48100 ± 0.6100 ± 0.266.0 ± 2.674.0 ± 1.060.0 ± 0.663.4 ± 2.4

(Cr(VI) reduction was carried out in V. B. broth containing 100 µM Cr(VI). The initial cell density was maintained at cells/mL. Separately sterilized metal solutions were added to V. B. broth at equimolar (100 µM) level of Cr(VI).
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).