2.9 Effect of Contact Time
The batch experiments were carried out to study the effect of activated carbon and fly
ash on various concentrations of acid magenta dye (20–60 mg/L) under different
exposure period (30–150 min). Results showed that the adsorption capacity of
activated carbon and fly ash increased rapidly with increasing contact time for the
first 120 min (Fig. 1a, b). The 120 min was considered as the optimum exposure
0
10
20
30
40
50
60
70
80
90
100
30
60
90
120
150
Dye removal (%)
Exposure Ɵme (minutes)
20mg/l
40 mg/l
60 mg/l
0
10
20
30
40
50
60
70
80
90
100
30
60
90
120
150
Dye removal (%)
Exposure Ɵme (minutes)
20mg/l
40 mg/l
60 mg/l
Fig. 1 (a) Adsorption of acid magenta dye by activated carbon at different exposure period. (b)
Adsorption of acid magenta dye by fly ash at different exposure period
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R. T. Kapoor