Abstract: A cement-based composition which comprises a mixture of a hyrdratable, cement-based composition and a compound comprising a metallic cationic species, the compound being in particulate form, the particles of the particulate compound having a lipid coating.

Abstract: The present paper proposes the production process of an inorganic medium, particulate, regeneratable, and able to remove contaminants by catalytic oxidation or reduction, as well as heavy metals removal by absorption from superficial, subterranean or dirty waters. The specific material is constituted by a composite of porous inorganic particles, on which surface it occurs the deposition of gamma dioxide manganese or epsilon manganese, the product showing a great selectivity and a high capacity, and may be produced into different granulometries, porosities and densities, and may also be produced specifically to meet different requirements of separators projects.