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PHOSPHATE CHEMICALS FOR BUILDING POTABLE WATER TREATMENT
Citation:
Schock*, M R. AND D A. Lytle*. PHOSPHATE CHEMICALS FOR BUILDING POTABLE WATER TREATMENT. Presented at Supplemental Treatment of Potable Water in Building Systems, National Association of Corrosion Engineers Corrosion/2001, Technical Information Exchange 156X, Houston, TX, 3/13/2001.
Description:
Buildings can contribute significant quantities of trace metal contamination to drinking water, particularly lead, copper and zinc. Discolored water may also result in corroded galvanized and steel plumbing and after prolonged stagnation times. To protect human health as well as to make the water aesthetically satisfactory, a variety of phosphate chemicals can be added as POE treatment. This presentation will cover: 1) Diagnostic sampling to ascertain the source of the problem(s), 2) The relationship of solubility of regulated metals to phosphate concentrations and other water quality parameters, 3) The stagnation profiles under different water chemistry conditions, 4) The types of chemicals available for metal control and basis for their selection, 5) Necessary supplemental treatment to assure effectiveness of the inhibitor program.