Colloids and Surfaces A: Physicochemical and Engineering Aspects

g r a p h i c a l a b s t r a c t a b s t r a c t Natural dolomite was calcined at different temperatures in the range 873-1373 K and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and N2 adsorp- tion/desorption isotherm. The calcination temperature had considerable effect on the surface chemical composition, crystallinity, and basicity of CO2 gas sorption of each component in the calcined products. The sorption isotherm of both in low and high concentrations of fluoride (F-) was investigated for selected calcination products. The sample calcined at 973 K was found to show the highest sorption density for F -