what is carbonate alkalinity
One source of alkalinity is calcium carbonate (CaCO 3), which is dissolved in water flowing through geology that has limestone and/or marble. Limestone is a sedimentary rock formed by the compaction of fossilized coral, shells and bones.he ability to resist changes in pH by neutralizing acids or bases is called buffering. Alkalinity is important to aquatic organisms because it protects them against rapid changes in pH. Alkalinity is especially important in areas where acid rain is a problem.