Process for treating a gas contaminated by at least one element selected from the group consisting of
heavy metals, organic compounds, and combinations thereof, wherein a
calcium-
phosphate reactant (
reagent) particle comprising
apatite is brought into contact with the contaminated gas at a temperature of at least 30° C. and preferably at most 1100° C. The
metal(s) and / or
organic compound(s) to be removed from the contaminated gas may be selected among the
list of: Al, Ag, As, Ba, Be, Bi, Ce, Co, Cd, Cu, Cr, Fe, Hf, Hg, La, Li, Mg, Mn, Mo, Ni, Pb, Pd, Rb, Sb, Se, Sn, Sr, Th, Ti, U, V, Y, Zn, Zr, VOC, aromatic compounds, PAHs, dioxins, furans, or any mixture thereof. In such process, an alkaline compound particle comprising
sodium bicarbonate,
sodium carbonate,
sodium sesquicarbonate (
trona), quick
lime, hydrated
lime,
lime stone or combinations thereof, may be further brought into contact with the contaminated gas.