When using salt for regeneration of ion exchange resin, what is the typical dosage range?

In the process of regenerating ion exchange resin, the correct typical dosage range for salt is crucial for effective operation. The correct choice indicates that the common dosage is between 6 to 12 pounds per cubic foot of resin. This range is specifically optimized to effectively replace the sodium ions on the resin with calcium or magnesium ions that have been captured during the water softening process.

Using this dosage ensures that the resin can be fully regenerated, restoring its capacity to soften water efficiently. A dosage within this range balances efficiency and cost, allowing for sufficient regeneration without wastage of salt. Lower dosages may not effectively regenerate the resin, while higher dosages could lead to unnecessary salt usage and increased operational costs. Thus, this dosage range is widely accepted in industry applications for maintaining optimal performance of ion exchange systems in water treatment.