Lead Corrosion in a Water Distribution System: Effect of Fluorosilicic Acid, Pipe Scale Analysis, and Equilibrium Speciation Simulation
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Lead is a toxic metal that continues to be a prevalent risk to human health. Exposure to lead through drinking water continues due to the prevalence of lead plumbing present in water distribution systems. Lead dissolution from plumbing materials is sensitive to water chemistry, which is influenced by both source water quality and water treatment processes. The City of Buffalo is considering a switch from sodium fluoride to Fluorosilicic Acid for fluoridation. Fluorosilicic Acid has the potential to increase dissolution from leaded plumbing. This work explores the effect Fluorosilicic Acid (FSA) has on total lead concentration in drinking water, and tests the lead scale products present in harvested lead service lines from the City of Buffalo. The pipe scale analysis will be compared to the results of equilibrium speciation software in order to assess the prediction of scale products from the model.