Beni-Suef University Journal of Basic and Applied Sciences

Table 7 Parameters of Cu²⁺ adsorption kinetics [104]

From: Fly ash-based geopolymers: an emerging sustainable solution for heavy metal remediation from aqueous medium

Samples	Pseudo-first order			Pseudo-second order
Samples	q_e (mg/g)	k₁ (per min)	R²	q_e (mg/g)	k₂ (g/mg/min)	R²
FA	8.31	0.35	0.952	8.49	0.07	0.994
Na-GP	29.95	0.23	0.930	32.39	0.01	0.990
K-GP	23.97	0.07	0.960	27.29	0.03	0.995
NaSil-GP	34.33	0.55	0.911	35.96	0.03	0.991
KSil-GP	27.67	0.32	0.959	29.5	0.02	0.992

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