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

Table 1

Comparison between pseudo-first-order and second-order kinetic models for chromium (VI) adsorption by IONPs and MIONPs.

Sorbents	First-order		Second-order
	R^2	K1 (min^−1)	R^2	K2 (g mg^−1 min^−1)
IONPs	0.9354	0.0081	0.9642	1.53
MIONPs	0.9996	0.0025	0.9998	3.17