Fixed-Bed Adsorption of an Azo Dye (Methyl Orange) onto Chemically and Thermally Regenerated Activated Carbons

Table 5

Bohart–Adams’ adsorption parameters for different concentrations and the Nelson–Yoon’s model for the different filling heights.

Model Bohart–Adams	Materials	Co (mg·L^−1)	Kab (mL·mg^−1·min^−1)	No (mg·L^−1)
F = 1.5 mL·min^−1; D = 9 mm	CA	5	0.00032	10,976.72	0.95
	CAR400		0.00076	6,722.89	0.82
	CAR700		0.00032	10,980.64	0.93
	CAR900		0.00040	7,608.99	0.80
	CA	10	0.00015	22,586.77	0.65
	CAR400		0.00006	23,765.20	0.87
	CAR700		0.00012	22,801.53	0.66
	CAR900		0.00011	27,242.98	0.75
Model Nelson–Yoon	Materials	Z (mm)	KYN (min^−1)	τ (min)
Co = 10 mg·L^−1; F = 1.5 mL·min^−1	CA	2.5	0.0052	14.05	0.60
	CAR400		0.0052	−327.59	0.75
	CAR700		0.0089	−16.15	0.81
	CAR900		0.0102	59.20	0.84
	CA	5	0.0105	74.38	0.83
	CAR400		0.0031	−311.77	0.68
	CAR700		0.0070	−1.05	0.87
	CAR900		0.0108	58.83	0.82