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NEW INSIGHTS INTO LEAD CORROSION CONTROL AND TREATMENT CHANGE IMPACTS
Citation:
SCHOCK, M. R. NEW INSIGHTS INTO LEAD CORROSION CONTROL AND TREATMENT CHANGE IMPACTS. Presented at Conference on Emerging Issues in WATER TREATMENT, AWWA of Michigan, LANSING, MI, May 15, 2007.
Description:
This presentation will summarize recent research into the chemistry of lead corrosion control, and focus on five different areas that could impact the prediction of whether or not particular treatment changes are likely to either disturb existing lead corrosion scales, or to actually improve Pb release. These areas are: 1) Oxidation-reduction chemistry of lead in relation to disinfection and oxidative processes, 2) Modes of occurrence and factors involved in the formation of tetravalent lead compounds, 3) Stagnation properties of lead corrosion, 4) Importance of dissimilar surface deposits on lead pipes, 5) Optimization of orthophosphate treatment: what it can and cannot do.
Strategies for the assessment of current corrosion control effectiveness and the importance of scale analysis and water treatment history in the determination of vulnerability to treatment changes will be covered, to assist utilities, regulators, and consultants in dealing with simultaneous compliance issues.