60
A. Geethakarthi
Fig. 17 Adsorption capacity of SC600 on Reactive Red 2 to reach equilibrium time at 120 rpm,
30°C and pH = 7.0
Fig. 18 Adsorption capacity of SC300 on Reactive Red 31 to reach equilibrium time at 120 rpm,
30°C and pH = 7.0
5.2.2 Effect of Contact Time and Initial Dye Concentration
on Adsorption Kinetics
The influence of initial dye concentration on adsorption of RR31 and RR2 onto
CAC, SC600 and SC300 was investigated in the concentration range of 10–60 mg/L
at pH = 7.0, temperature 30 °C and an adsorbent dosage of 1 g/100 mL. When the
initial dye concentration increased from 10 mg/L to 60 mg/L, the amount of dye
adsorbed increased from 9.36 mg/g to 34.58 mg/g for CAC on RR31, 6.44 mg/g to
50.64 mg/g for CAC on RR2, 8.51 mg/g to 34.27 mg/g for SC600 on RR31, 9.48 mg/g
to 43.20 mg/g for SC600 on RR2, 8.48 mg/g to 41.88 mg/g for SC300 on RR31 and
A. Geethakarthi
Fig. 17 Adsorption capacity of SC600 on Reactive Red 2 to reach equilibrium time at 120 rpm,
30°C and pH = 7.0
Fig. 18 Adsorption capacity of SC300 on Reactive Red 31 to reach equilibrium time at 120 rpm,
30°C and pH = 7.0
5.2.2 Effect of Contact Time and Initial Dye Concentration
on Adsorption Kinetics
The influence of initial dye concentration on adsorption of RR31 and RR2 onto
CAC, SC600 and SC300 was investigated in the concentration range of 10–60 mg/L
at pH = 7.0, temperature 30 °C and an adsorbent dosage of 1 g/100 mL. When the
initial dye concentration increased from 10 mg/L to 60 mg/L, the amount of dye
adsorbed increased from 9.36 mg/g to 34.58 mg/g for CAC on RR31, 6.44 mg/g to
50.64 mg/g for CAC on RR2, 8.51 mg/g to 34.27 mg/g for SC600 on RR31, 9.48 mg/g
to 43.20 mg/g for SC600 on RR2, 8.48 mg/g to 41.88 mg/g for SC300 on RR31 and