Contact time (h)

Initial concentration (mg)

Dose (gm)

pH

Removal efficiency (%)

Desirability

4.5

50

0.1

4.04

61.77

0.996

4.32

50

0.1

3.98

61.38

0.989

4.5

54.11

0.1

4.02

60.33

0.972