Table 1.

Parameters of the Langmuir, Freundlich, and Dubinin–Radushkevich isotherms for the adsorption of HM and NM ions onto DTC-g-PE-DA@GB@PU and PE-DA@GB@PU, respectively, at 25 °C.

Isotherms	Isotherm Constants	Heavy Metal Ions			Noble Metal Ions
		Cu2+	Pb2+	Cd2+	Pd2+	Pt4+	Au3+
Langmuir	Fmax (mg g−1)	41.2	113.9	57.1	285.7	185.2	384.6
	K (L mg−1)	0.02915	0.3776	0.1726	0.0986	0.1192	0.2524
	R 2	0.9164	0.9935	0.9971	0.9985	0.9988	0.9997
	RL	0.2554–0.6317	0.0145–0.1169	0.0461–0.2246	0.0125–0.9103	0.0138–0.8935	0.0049–0.7985
Freundlich	Kf (mg g−1) (L mg−1)1/n	2.816	44.17	15.57	37.025	32.946	58.844
	n	1.823	4.200	3.207	2.682	3.095	2.597
	R 2	0.9431	0.9891	0.9635	0.9653	0.9614	0.9102
Dubinin–Radushkevich	FD-R (mg g−1)	30.6	98.2	45.6	128.14	101.64	195.43
	E	0.082	0.780	0.728	2.946	3.402	2.884
	R 2	0.9832	0.7024	0.8152	0.6336	0.7531	0.7947