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

Table 2

Crystalline phases from diffractograms.

2θ (degree)	dhkl (Å)	Crystalline phases
20.98	4.23	Quartz (SiO2) and graphite (C)
26.84	3.32	Quartz (SiO2) and carbon (C)
29.38	3.04	Calcite (CaCO3) and chaoite (C)
36.02	2.49	Magnesite (MgCO3) and carbon (C)
36.79	2.44	Moissanite (SiC)
39.78	2.26	Moissanite (SiC) and chaoite (C)
47.63	1.90	Calcite (CaCO3)
50.83	1.80	Quartz (SiO2) and graphite (C)
60.12	1.53	Calcite (CaCO3) and moissanite (SiC)
68.64	1.36	Magnesite (MgCO3)