Advances in Physical Chemistry / 2014 / Article / Tab 4 / Research Article
Sorption of Ammonium Ions onto Natural and Modified Egyptian Kaolinites: Kinetic and Equilibrium Studies Table 4 Kinetic constants and correlation coefficients for sorption of ammonium using natural and modified kaolinite sorbents at different initial concentrations.
Sorbents
, (mg·L−1 )
(mg·g−1 ) Pseudo-first-order Pseudo-second-order
Intraparticle diffusion Elovich kinetic model
(mg·g−1 )
(mg·g−1 )
K 100 2.65
6.33 0.9145
2.82 0.9947 2.09 2.48 2.77 0.171 0.9811 200 7.88
10.22 0.8632
8.47 0.9987 4.55 29.30 26.49 0.071 0.9598 500 18.58
21.22 0.9335
18.87 0.9971 12.77 39.24 33.25 0.028 0.9824 AHK 100 4.44 0.0104 18.17 0.9342
4.52 0.9979 1.64 27.38 47.64 0.149 0.9554 200 10.23 0.0239 20.33 0.9424
10.70 0.9997 1.94 80.21 100.08 0.144 0.9514 500 25.65 0.0214 35.56 0.9219
24.56 0.9997 0.676 84.44 234.29 0.138 0.9538 HK 100 4.89
24.17 0.8888
5.04 0.9999 1.49 35.05 196.37 0.160 0.9645 200 9.93
25.10 0.9205
9.52 0.9997 0.407 96.45 172.18 0.142 09656 500 22.76 0.0198 44.8 0.9389
22.98 0.9995 4.58 198.96 302.19 0.069 0.9654 HAK 100 4.75 0.0161 15.1 0.8971
4.87 0.9997 1.80 30.02 65.97 0.161 0.9755 200 9.55 0.0103 14.0 0.8935
9.71 0.9998 2.37 73.69 75.01 0.135 0.9887 500 23.16
64.8 0.8773
23.25 0.9992 3.04 197.28 221.18 0.061 0.9745