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Table 2

Adsorption kinetic constants under different concentrations

Concentration (mg·L−1)Pseudo-first-order
Pseudo-second-order
Bangham
qe,exp (mg·g−1)
qe (mg·g−1)k1 (min−1)R2qe (mg·g−1)k2 (g·mg−1·min−1)R2k0αR2
20 4.14 0.0744 0.8826 7.08 0.0645 0.9992 0.0255 0.1918 0.9273 6.94 
30 5.11 0.0791 0.9068 10.04 0.0640 0.9996 0.0276 0.1543 0.9071 9.89 
40 8.62 0.0753 0.9598 12.87 0.0283 0.9990 0.0174 0.2411 0.8770 12.53 
60 11.11 0.0736 0.9615 17.42 0.0223 0.9991 0.0183 0.1880 0.9402 17.00 
80 11.10 0.0559 0.9638 20.08 0.0171 0.9992 0.0139 0.2016 0.9011 19.60 
100 16.75 0.0625 0.9678 22.42 0.0098 0.9977 0.0087 0.2671 0.9275 21.53 
120 11.40 0.0614 0.9540 23.31 0.0192 0.9995 0.0120 0.1580 0.9000 22.84 
140 11.11 0.0430 0.9110 23.75 0.0144 0.9989 0.0103 0.1499 0.9469 23.28 
Concentration (mg·L−1)Pseudo-first-order
Pseudo-second-order
Bangham
qe,exp (mg·g−1)
qe (mg·g−1)k1 (min−1)R2qe (mg·g−1)k2 (g·mg−1·min−1)R2k0αR2
20 4.14 0.0744 0.8826 7.08 0.0645 0.9992 0.0255 0.1918 0.9273 6.94 
30 5.11 0.0791 0.9068 10.04 0.0640 0.9996 0.0276 0.1543 0.9071 9.89 
40 8.62 0.0753 0.9598 12.87 0.0283 0.9990 0.0174 0.2411 0.8770 12.53 
60 11.11 0.0736 0.9615 17.42 0.0223 0.9991 0.0183 0.1880 0.9402 17.00 
80 11.10 0.0559 0.9638 20.08 0.0171 0.9992 0.0139 0.2016 0.9011 19.60 
100 16.75 0.0625 0.9678 22.42 0.0098 0.9977 0.0087 0.2671 0.9275 21.53 
120 11.40 0.0614 0.9540 23.31 0.0192 0.9995 0.0120 0.1580 0.9000 22.84 
140 11.11 0.0430 0.9110 23.75 0.0144 0.9989 0.0103 0.1499 0.9469 23.28 
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