Parameters of the Langmuir isotherm for the adsorption of OII, MB, and Pb²⁺ on GO and PRGO.

		GO	PRGO-1	PRGO-2	PRGO-3
OII	q max (mg g−1)	8.4	16.8	22.6	32.5
	K L (L mg−1)	7.5 × 10−2	1.1 × 10−1	1.3 × 10−1	2.1 × 10−1
	R 2	0.971	0.975	0.965	0.982
MB	q max (mg g−1)	429	415	380	386
	K L (L mg−1)	0.28	0.26	0.27	0.23
	R 2	0.988	0.993	0.997	0.993
Pb2+	q max (mg g−1)	431	459	444	446
	K L (L mg−1)	0.5 × 10−1	4.2 × 10−1	4.0 × 10−1	4.3 × 10−1
	R 2	0.995	0.980	0.985	0.979