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Table 5

Isotherm parameters obtained from the Langmuir model and Freundlich model of Cd(II) and Pb(II) on AMA-5 at different temperatures

Metal ionT (K)Langmuir model
Freundlich model
Qm (mg/g)kL (L/mg)R2kF (mg/g (L/mg)1/n)nR2
Cd(II) 288 232.56 0.1401 0.9986 57.9743 3.4388 0.7666 
298 243.90 0.1653 0.9973 71.1863 3.7875 0.6715 
308 250.00 0.2381 0.9981 81.9574 4.1667 0.7278 
318 263.16 0.3220 0.9975 97.7292 4.6147 0.8715 
Pb(II) 288 277.28 0.3186 0.9978 99.2955 4.4883 0.8831 
298 285.71 0.4023 0.9989 101.1495 4.2662 0.8481 
308 294.18 0.5574 0.9984 122.9650 4.9092 0.9163 
318 303.03 0.7333 0.9985 140.1341 5.3967 0.9122 
Metal ionT (K)Langmuir model
Freundlich model
Qm (mg/g)kL (L/mg)R2kF (mg/g (L/mg)1/n)nR2
Cd(II) 288 232.56 0.1401 0.9986 57.9743 3.4388 0.7666 
298 243.90 0.1653 0.9973 71.1863 3.7875 0.6715 
308 250.00 0.2381 0.9981 81.9574 4.1667 0.7278 
318 263.16 0.3220 0.9975 97.7292 4.6147 0.8715 
Pb(II) 288 277.28 0.3186 0.9978 99.2955 4.4883 0.8831 
298 285.71 0.4023 0.9989 101.1495 4.2662 0.8481 
308 294.18 0.5574 0.9984 122.9650 4.9092 0.9163 
318 303.03 0.7333 0.9985 140.1341 5.3967 0.9122 
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