Use of surface-reacted natural calcium carbonate for purifying water

摘要

Disclosed is a process for the purification of water, wherein surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted natural calcium carbonate and having a pH of greater 5 than 6.0, measured at 20 degrees C, is added to the water to be purified, wherein the surface-reacted natural calcium carbonate is the reaction product of a natural calcium carbonate with carbon dioxide and one or more acids.