Waste-Tire-Derived Activated Carbon as Efficient Adsorbent of P-Nitrophenol from Wastewater

Table 7

The parameter of the Langmuir, Freundlich, and Sips model isotherm for PNP adsorption on 650-2.

Langmuir		Freundlich		Sips
Parameters		Parameters		Parameters
qm (mg g^−1)	197.18	KF (mg g^−1)	172.2	qm (mg g^−1)	163.9
KL (L mg^−1)	0.008	n	0.96	Ks (L g^−1)	0.003
R^2	0.995	R^2	0.994	n	2.12
χ^2	0.008	χ^2	0.009	R^2	0.997
				χ^2	0.0001