Table 4.

Kinetics parameters for adsorption of AB40 on Fe₃O₄, PANI and PANI/Fe₃O₄ composite with Elovich model and intra-particle diffusion model.

	Elovich Model			Intra Particle Diffusion Model
Adsorbents	α (mg g−1min−1)	β (g mg−1)	R2	kd (g mg−1min−1/2)	C (mg g−1)	R2
Fe3O4	131.9	0.258	0.911	0.556	32.45	0.864
PANI	439.8	0.637	0.929	1.257	61.89	0.916
PANI/ Fe3O4	378.7	0.267	0.707	0.847	53.47	0.917