Ozonation of Indigo Carmine Enhanced by Fe/Pimenta dioica L. Merrill Particles

Table 2

Characteristics of catalytic materials.

	MPS	MPS/Fe
Specific surface area (m^2g^−1)	2.40	4.58
Cumulative pore volume (cm^3 (STP) g^−1)	0.55	1.05
Mean pore diameter (nm)	4.45	6.61
Total pore volume () = 0.990 (cm^3g^−1)
Carbon	54.61%	17.29%
Oxygen	42.84%	59.65%
Sodium	0.57%	20.76%
Calcium	1.99%	0.58%
Iron	0%	1.72%