Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution

Table 4

Langmuir, Freundlich, and Temkin isotherm constants for Pb (II) uptaken by S-CNs.

Metal	Langmuir equation			Freundlich equation			Temkin equation
	KL	qm	R^2	KF	n	R^2	KT	B	R^2
Pb (II)	0.005	39.566	0.993	35.880	30.950	0.003	69.686	9.850	0.033