Sl.No

Bacterial strain

Time interval in
hours

Cr (VI) Absorbance at
OD 382nm

1

P1

3

0.46

 

 

6

0.62

 

 

9

0.72

 

 

12

0.78

 

 

24

0.90

 

 

48

1.00

2

P2

3

0.42

 

 

6

0.60

 

 

9

0.68

 

 

12

0.74

 

 

24

0.88

 

 

48

0.98

3

P3

3

0.56

 

 

6

0.62

 

 

9

0.74

 

 

12

0.80

 

 

24

0.94

 

 

48

1.00

4

P4

3

0.60

 

 

6

0.78

 

 

9

0.82

 

 

12

0.90

 

 

24

0.96

 

 

48

1.00

Table 7b: Cr (VI) reduction by 4 bacterial isolates grown in LB broth supplemented 2ppm Cr (VI).