Table 3 Kinetic parameters and correlation coefficients of the two kinetic equations on c-MCM-41(40)
Metal ions | q e.exp (mg/g) | First-order kinetic model | Second-order kinetic model | ||||
---|---|---|---|---|---|---|---|
a e,cal (mg/g) | K 1 | R 2 | q e,cal (mg/g) | K 2 | R 2 | ||
Cu2+ | 11.57 | 2 | 0.2758 | 0.6427 | 11.61 | 0.5733 | 0.9975 |
Pb2+ | 18.7 | 5.74 | 0.2401 | 0.8839 | 19.4 | 0.1467 | 0.9998 |
Cd2+ | 9.25 | 1.83 | 0.199 | 0.6231 | 9.44 | 0.291 | 0.9909 |