Calcium in Water

Calcium in water is the major cause of calcium water hardness and is usually in the range of 5 - 500 mg/l, as CaCO3 . Calcium is also the fifth most abundant dissolved ion in water, furthermore, Calcium is derived from nearly all rocks, but the greatest concentrations come from limestone and gypsum. Calcium in water occurs when water percolates through limestone or other soluble carbonate rocks; it partially dissolves the rock and then forms calcium hard water. Calcium ions in water are the principal cations in most natural waters. Calcium reduction is required in treating cooling tower makeup. Complete removal is required in metal finishing, textile operations, and boiler feed applications.

Calcium Water Treatment -Calcium in water, as with all water hardness, can be removed with a simple sodium form cation exchanger (water softener). Reverse Osmosis Water System will remove 95 - 98 % of the calcium in the water. Electrodialysis and Ultrafiltration also will remove calcium from water. Calcium removal from water can also be done with the hydrogen form cation exchanger portion of a deionizer system.