Biomass concentration (g/l) in Cr(VI) treated cultures
Biomass concentration (g/l) in Cr(VI)-free medium after initial exposure to Cr(VI)
A. niger
A. parasiticus
A. niger
A. parasiticus
0
a3.344 ± 0.010
a2.982 ± 0.013
a3.311 ± 0.050
a2.926 ± 0.024
5
a3.332 ± 0.030
a2.352 ± 0.017
a3.246 ± 0.048
a2.900 ± 0.037
10
b2.520 ± 0.023
b1.303 ± 0.034
a3.331 ± 0.025
a2.856 ± 0.028
15
c1.330 ± 0.018
b1.000 ± 0.016
a3.229 ± 0.031
a2.853 ± 0.045
20
c1.200 ± 0.015
c0.180 ± 0.015
a3.297 ± 0.023
b2.740 ± 0.023
Values are presented as Mean ± S.D. of four determinations.
Mean values with different superscripts along a column are significantly different (P < 0.05).
Table 5: Biomass concentrations of A. niger and A. parasiticus regenerated from hexavalent chromium treated cultures in a chromium-free medium.
