A. niger

 

A. parasiticus

 

No cells

 

Active

 

Inactive

 

Active

 

Inactive

 

49.27±0.24

 

16.72 ± 1.25
(66.1%)

 

40.44 ± 0.97
(17.9%)

 

22.83 ± 1.03
(53.7%)

 

41.30 ± 1.13
(16.2%)
Values are presented as Means ± S. D of triplicate determinations.
Mean values are statistically different (P< 0.05).
Figures in parentheses represent percentage Cr(VI) removal.
Table 1: Residual concentration of Cr(VI) (mg/l) in solution after 72 hours of incubation at 300C in Vogel’s mineral salt medium spiked with Cr(VI) at initial concentration of 50mg/l