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Table 3

Kinetic parameters of cations adsorbed onto composite adsorbent at different adsorbent amounts

Cationqe exp. (mg/g)Pseudo-first-order kinetic model
Pseudo-second-order kinetic model
qe cal. (mg/g)k1 (1/min)R2qe cal. (mg/g)k2 (g/mg min)R2
Zn2+ 2.58 1.24 0.076 0.86 2.78 0.083 0.997 
Ni2+ 1.5 1.67 0.048 0.932 2.12 0.017 0.973 
Cationqe exp. (mg/g)Pseudo-first-order kinetic model
Pseudo-second-order kinetic model
qe cal. (mg/g)k1 (1/min)R2qe cal. (mg/g)k2 (g/mg min)R2
Zn2+ 2.58 1.24 0.076 0.86 2.78 0.083 0.997 
Ni2+ 1.5 1.67 0.048 0.932 2.12 0.017 0.973 
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