Activated Alumina Balls have a high surface area to weight ratio, which makes them effective in adsorbing moisture and other impurities from gases and liquids. They can also be used for the purification of drinking water, removal of fluoride and arsenic from water, and as catalyst support in various chemical reactions. The activation process of alumina involves heating it to a high temperature and then rapidly cooling it to create a network of tiny pores and channels throughout the material. This increases its surface area and makes it more reactive, allowing it to adsorb and retain impurities more effectively.