Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater

Table 2

Isotherms studies and their parameters.

Isotherms		FNS		PNS
		Pb(II)	Cr(VI)	Pb(II)	Cr(VI)
Langmuir	(mgg^-1)	19.99	10.21	12.06	15.11
	(Lmg^-1)	6.6301	0.0412	1.0751	0.0642
		0.9031	0.9973	0.9355	0.9952
Freundlich		22.783	48.654	19.791	4.425
	(mg^(1-n) L^n g^-1)	0.730	6.589	0.684	1.322
		0.9961	0.893	0.9975	0.8869
Experimental () (mg/g)		29.80	7.80	29.47	15.74