Novel Nano-Fe₂O₃-Co₃O₄ Modified Dolomite and Its Use as Highly Efficient Catalyst in the Ozonation of Ammonium Solution

Table 1

Element composition (wt%) of dolomite (raw ores), activated dolomite, Fe₂O₃/dolomite, and Fe₂O₃-Co₃O₄/dolomite samples.

Sample	Dolomite (raw ores) (% weight)	Activated dolomite (% weight)	Fe2O3/dolomite (% weight)	Fe2O3-Co3O4/dolomite
				% weight	% atomic percentage
O	61.50	57.98	51.15	44.19	58.47
Mg	11.55	11.98	9.91	10.24	9.03
Ca	16.89	19.96	16.89	4.59	2.43
C	10.06	10.09	12.67	10.74	18.95
Cl	—	—	0.35	0.37	0.22
Fe	—	—	9.59	10.06	3.63
Co	—	—	—	20.27	7.27
Total	100	100	100	100	100