Langmuir and Freundlich isotherm parameters for the adsorption of Cr(vi) ions by f-HNTs.

Sample	Metal ion	Langmuir parameters				Freundlich parameters
		R 2	Q o	b	R L	R 2	K f	n
H1	Cr(vi)	0.99555	83.195	0.12245	0.4495	0.87353	13.187	2.238
H2	Cr(vi)	0.99239	64.977	0.3158	0.2405	0.92666	16.215	2.633
H3	Cr(vi)	0.98942	46.404	0.0480	0.6754	0.858	5.303	2.293
H4	Cr(vi)	0.96799	30.618	0.0555	0.643	0.70891	5.019	2.828