Benzene Removal by Iron Oxide Nanoparticles Decorated Carbon Nanotubes

Table 2

Isotherm models parameters for benzene adsorbed on raw and iron oxide nanoparticles impregnated CNTs (pH: 6, temperature: 298 K, and initial concentration: 1–200 mg/L).

Model	Parameters	⁢Adsorbents
		Raw CNTs	CNTs − iron oxide
Langmuir	(L/mg)	0.0031	0.0014
	(mg/g)	517.27	987.58
		0.992	0.994
		0.969	0.986
Freundlich	(L/mg)	3.027	1.926
		1.264	1.119
		0.989	0.993
Dubinin-Radushkevich (D-R)	(mg/g)	207.21	248.45
	(mole^2/kJ^2)	671.45	1136.23
	(kJ/mole)	0.027	0.021
		0.993	0.994