Table 3.

PSO model parameters and activation energy (Ea) for the adsorption of Cr(VI), AB-225, AV-109, and AG-40 onto MgAl-LDH@SiO₂ at 25, 35, and 45 °C.

	T (°C)	qe (mg g−1)	k2 (g (mg min)−1)	R2	Ea (KJ mol−1)
Cr(VI)	25 °C	90.01 ± 2.61	0.00179 ± 0.0001	0.998
	35 °C	91.60 ± 2.62	0.00202 ± 0.0002	0.998	9.13
	45 °C	93.26 ± 2.87	0.00226 ± 0.0001	0.999
AB-225	25 °C	254.5 ± 10.4	0.00120 ± 0.0002	0.999
	35 °C	252.8 ± 9.09	0.00150 ± 0.0001	0.999	18.4
	45 °C	251.4 ± 8.96	0.00192 ± 0.0002	0.999
AV-109	25 °C	232.5 ± 7.86	0.00117 ± 0.0001	0.988
	35 °C	232.9 ± 8.32	0.00126 ± 0.0001	0.998	6.18
	45 °C	233.3 ± 8.51	0.00137 ± 0.0001	0.998
AG-40	25 °C	468.5 ± 6.15	0.00129 ± 0.0001	0.999
	35 °C	469.9 ± 6.06	0.00134 ± 0.0001	0.999	5.61
	45 °C	470.4 ± 5.91	0.00149 ± 0.0001	0.999