Table 2.

Kinetic constants of SCC adsorption on H. communis sponge skeletons at different dye concentrations (100, 200 and 300 mg/L; pH = 7; 0.1 M NaCl).

Kinetic Models	Parameters	Initial Dye Concentration
		100 (mg/L)	200 (mg/L)	300 (mg/L)
Pseudo-First Order	qe,exp (mg/g)	24.84	49.73	74.57
	qe,cal (mg/g)	0.17	14.62	12.80
	k1 (1/min)	0.006	0.084	0.076
	r2	0.003	0.327	0.404
Pseudo-Second Order	qe,cal (mg/g)	24.87	49.83	75.85
	k2 (g/mg·min)	0.102	0.010	0.009
	r2	0.999	0.997	0.999
	h	63.07	24.80	50.94