Adsorption Characteristics and Electrochemical Behaviors of Methyl Blue onto Magnetic Mg_xCo_yZn_(1-x-y)Fe₂O₄ Nanoparticles

Table 1

Fitted kinetics parameters for adsorptions of MB in aqueous solution onto Mg_0.4Co_0.5Zn_0.1Fe₂O₄ nanoparticles at room temperature.

Kinetics models	Equations	Parameters	Initial concentration of MB (mg·L^-1)
			1900	2000	2100	2200
Pseudo-first-order model			754.9470	792.9734	832.3179	871.1886
			0.4740	0.48560	0.4208	0.2963
			0.7752	0.6888	0.7231	0.7961
Pseudo-second-order model			756.3431	794.3882	835.0674	880.4483
			0.0125	0.0126	0.0064	0.0018
			0.9927	0.9911	0.9964	0.9966
Intraparticle diffusion model			749.7993	787.7387	822.2724	837.7911
			0.5401	0.5546	1.0581	3.4625
			0.6983	0.7482	0.7158	0.6591

(mg·g^-1) and (mg·g^-1) were the amounts of MB adsorbed at equilibrium and at any time (), respectively; (min^-1), (mg·g^-1·min^-1), and (mg·g^-1·min^-1) were the adsorption rate constants for the corresponding model; was the constants of the intraparticle diffusion model.