Removal of Heavy Metals from Drinking Water by Magnetic Carbon Nanostructures Prepared from Biomass

Table 2

Langmuir adsorption constants for heavy metals on nanostructures from watermelon waste.

Heavy metals	Langmuir constants			Freundlich constants
	Arsenic	32894		0.025	0.929237		0.9040	859.25	0.9810
Chromium	21012	0.021	0.9274	1.0944	277.86	0.9617
Copper	38258	0.0078	0.8194	1.004	261.25	0.9834
Lead	29837	0.0312	0.8267	0.9156	905.87	0.9910
Zinc	18654	0.0307	0.8192	1.1910	292.96	0.9709