What is the maximum acid solubility percentage allowed for filter sand after treatment?

The maximum acid solubility percentage allowed for filter sand after treatment is established to ensure the quality and effectiveness of the sand in filtration processes. When sand is treated, especially for use in water treatment facilities, it is crucial that the filter media maintains its integrity and does not dissolve excessively in acidic conditions, which could compromise the filtration system's efficiency and the overall water quality.

A maximum acid solubility of 50% is considered acceptable, as it indicates that the filter sand retains sufficient robustness and does not degrade significantly under acidic conditions. This allows for effective filtration while ensuring the sand can withstand the operational environment it will encounter.

Understanding the acid solubility of filter sand is vital in the context of water treatment as it ensures that contaminants are effectively removed from water sources, and that the filtration media itself does not introduce unwanted impurities into the treated water. Thus, setting a standard of 50% helps maintain both the structural integrity of the sand and the quality of the treated water.