Biosorption of Congo Red Dye from Aqueous Solution Using Adsorbent Prepared from Vangueria infausta Fruit Pericarp

Table 3

Pseudo-first- and pseudo-second-order and intraparticle diffusion kinetic parameters for adsorption of CR by treated VIFP (pH 2, 0.7 g VIFP, contact time of 30-210 min, and initial CR concentration of 10 mg/L).

(exp.) (mg/g)	Pseudo-first-order kinetics				Pseudo-second-order kinetics				Intraparticle diffusion
	(min^-1)	(cal.) (mg/g)		±SD	g/mg/min)	(cal.) (mg/g)		±SD	(mg/gmin^0.5)		±SD
0.710	0.014	0.168	0.9605	0.104	0.390	0.706	0.9997	0.035		0.979	0.009