Adsorption of Chromium Ions from Aqueous Solutions by Synthesized Nanoparticles

Table 2

Cr removal for different concentrations and temperatures.

		Concentration			Temperature
Models	Parameters	50 ppm	100 ppm	150 ppm	30°C	40°C	50°C
Pseudo first order		0.85	0.96	0.97	0.97	0.95	0.95
		0.02	0.026	0.02	0.03	0.03	0.04
		1.61	1.85	1.89	1.91	2.07	2.09
					0.99	0.98	0.99
Pseudo second order		0.86	0.99
		0.02	0.016	0.01	0.03	0.02	0.02
		3.51	0.43	0.37	0.44	0.46	0.42
Fractional power	^2	0.99	0.95	0.99	0.95	0.93	0.95
		0.86	0.46	0.86	0.46	0.49	0.45
		0.94	1.85	2.11	1.85	1.71	1.74
Intraparticle diffusion	R^2	0.72	0.85	0.94	0.85	0.81	0.83
		0.46	0.33	0.46	0.33	0.34	0.32
Elovich		0.55	0.97	0.98	0.97	0.96	0.96