Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Table 1

Kinetic parameters for the adsorption of benzene/toluene by CuO-NPs for different concentrations at pH = 7.

, mg/L	Pseudo-first-order			Pseudo-second-order			Intraparticle diffusion
	(1/min)	(mg/g)		(g/mg/min)	, mg/g		(g/mg/min^0.5)	(mg/g)
Benzene
10	0.0235	1056	0.8629	1.5511	0.0543	0.9441	1.3165	1.4322	0.9262
50	0.0398	38.66	0.6156	0.1912	0.0108	0.9922	6.876	13.179	0.871
100	0.0465	164.35	0.9476	0.0955	0.0055	0.9823	12.151	37.5	0.9407
200	0.0515	224.08	0.9149	0.0246	0.0029	0.9971	18.694	136.61	0.9061
Toluene
10	0.021	9.39	0.8922	1.5549	0.063	0.9342	0.9983	2.7892	0.9055
50	0.037	40.07	0.8834	0.1322	0.0123	0.9975	5.251	23.492	0.8835
100	0.0453	109.51	0.9077	0.0709	0.006	0.9926	10.097	51.504	0.9335
200	0.0499	165.67	0.9003	0.024	0.0031	0.9926	15.521	146.66	0.8969