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AWWA ACE70651
- Aluminum Phosphate Solubility and Post-Precipitation in the Distribution System
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
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This powerpoint presentation begins by providing a brief overview of aluminum (Al) post-precipitation, and the Lake Michigan utilities' treatment processes for Al. Primary objectives included:mechanisms of formation of Al - PO<sub>4</sub> precipitate;can adjusting blended phosphate corrosioninhibitor stop precipitate from forming;are there other operational parameters that cankeep this precipitate from forming; and,recommendation on remediation. XRD and SEM-EDS data frompipe coupons are presented, along with aluminum solubility in thepresence of phosphate. Includes figures.