Table 5.

Estimated kinetic parameters for the first-order rate kinetic model at different copper concentrations.

Initial Concentration of Cu Ion (ppm)	R2	K1 (min−1)	qe (cal.) (mg/g)	qe (exp.) (mg/g)
100	0.93	0.025	0.616	0.86
500	0.95	0.032	3.194	4.52
750	0.95	0.041	3.758	6.667
1000	0.94	0.021	4.559	8.05
2000	0.99	0.03	7.798	8.333
3000	0.98	0.037	7.53	6.667
4000	0.97	0.03	7.464	8
5000	0.95	0.037	7.716	6.663