Method for preparing a hybrid ion-exchange material, the method comprising: a. providing powder or granules of a porous active carbon support that have been preliminary dried to evacuate physically adsorbed water from the pores; b. spraying an aqueous solution of aluminum-containing mixed oxide precursor onto the granules or powder of porous active carbon support in amount sufficient to fill open pores of the support up to 90% of their volume, wherein within the solution of aluminum-containing mixed oxide precursor, a water soluble compound that includes aluminum sulfate, aluminum chloride, aluminum nitrate, or combinations thereof, and a polyvalent metal compound including water soluble nitrates, chlorides, sulfates of titanium, zirconium, tin, cerium, lanthanum, iron, manganese, or combinations thereof is used, wherein the alumina content in the solution of aluminum-containing mixed oxide precursor is from about 20 wt% up to about 80 wt%; c. drying the hence impregnated active carbon support until removal of 40% to 60% of the water added; d. contacting granules or powder of impregnated active carbon support with a solution of a base reagent at a pH level sufficient to neutralize acidic aluminum-containing mixed oxide precursor in the support pores with the formation of nano-sized hydrous mixed oxide of the elements in the pores, wherein the solution of a base reagent is chosen from alkali hydroxides, ammonium hydroxide, alkali carbonates, ammonium carbonate, and combinations thereof; e. washing the hybrid ion-exchange material with water to remove occluded electrolytes; and f. drying the hybrid ion-exchange material via a Loss on Drying method until the hybrid ion-exchange material has an LOD less than 10%. a. providing powder or granules of a porous active carbon support that have been preliminary dried to evacuate physically adsorbed water from the pores; b. spraying an aqueous solution of aluminum-containing mixed oxide precursor onto the granules or powder of porous active carbon support in amount sufficient to fill open pores of the support up to 90% of their volume, wherein within the solution of aluminum-containing mixed oxide precursor, a water soluble compound that includes aluminum sulfate, aluminum chloride, aluminum nitrate, or combinations thereof, and a polyvalent metal compound including water soluble nitrates, chlorides, sulfates of titanium, zirconium, tin, cerium, lanthanum, iron, manganese, or combinations thereof is used, wherein the alumina content in the solution of aluminum-containing mixed oxide precursor is from about 20 wt% up to about 80 wt%; wherein within the solution of aluminum-containing mixed oxide precursor, a water soluble compound that includes aluminum sulfate, aluminum chloride, aluminum nitrate, or combinations thereof, and a polyvalent metal compound including water soluble nitrates, chlorides, sulfates of titanium, zirconium, tin, cerium, lanthanum, iron, manganese, or combinations thereof is used, wherein the alumina content in the solution of aluminum-containing mixed oxide precursor is from about 20 wt% up to about 80 wt%; c. drying the hence impregnated active carbon support until removal of 40% to 60% of the water added; d. contacting granules or powder of impregnated active carbon support with a solution of a base reagent at a pH level sufficient to neutralize acidic aluminum-containing mixed oxide precursor in the support pores with the formation of nano-sized hydrous mixed oxide of the elements in the pores, wherein the solution of a base reagent is chosen from alkali hydroxides, ammonium hydroxide, alkali carbonates, ammonium carbonate, and combinations thereof; e. washing the hybrid ion-exchange material with water to remove occluded electrolytes; and f. drying the hybrid ion-exchange material via a Loss on Drying method until the hybrid ion-exchange material has an LOD less than 10%.