Table 1: Comparison of the adsorption constant for MB and CR.

Dyes (mg/L)   (mg/g) Langmuir isothermFreundlich isotherm
(mg/g)b (1/mg) 1/n

MB1.000.231.531.250.990.78 0.940.83
2.000.56
3.000.87
4.001.17
5.001.18

CR3.000.121.15 0.330.980.39 0.130.82
5.000.34
7.000.59
9.000.74
11.000.75