Supercritical CO₂ Assisted Synthesis of EDTA-Fe₃O₄ Nanocomposite with High Adsorption Capacity for Hexavalent Chromium

Table 2

Langmuir, Freundlich and Temkin isotherm model constant for adsorption of chromium (VI).

Sorbents	Langmuir model			Freundlich model			Temkin model
	b (Lmg^−1)	R^2		(mgg^−1)	n	R^2	b (J/moL)	R^2
IONPs	0.0023	0.9032	0.456	6.986	1.92	0.9752	0.056	0.9201
MIONPs	0.0039	0.9312	0.339	3.184	1.38	0.9809	0.0013	0.9694