Impact of iron‐rich scale in service lines on lead release to water

Yeunook Bae; Jill D. Pasteris; Daniel E. Giammar

doi:10.1002/aws2.1188

journal article Jul 01, 2020

Impact of iron‐rich scale in service lines on lead release to water

Yeunook Bae

Jill D. Pasteris Daniel E. Giammar

AWWA Water Science Vol. 2 No. 4 · Wiley

View at Publisher Save 10.1002/aws2.1188

Abstract

AbstractTotal iron and total lead concentrations were correlated in water that had stagnated in laboratory‐scale experiments with sections of 10 harvested lead service lines (LSLs) from Providence, Rhode Island. One of these sections had much greater lead release and pH decrease during stagnation, and the inner surface of this service line had a thick coating of iron oxide scale. The iron‐rich scale was composed of coarse‐grained iron oxides (lepidocrocite and magnetite) covered with a thin lead‐bearing layer (hydrocerussite). Complementary batch experiments with pure iron oxides found that their surfaces accelerated the oxidation of Pb(II) from hydrocerussite, which produced PbO2(s) and decreased the pH. While the findings presented are for LSLs from Providence, the co‐occurrence of iron oxides and lead corrosion products is widespread. The results highlight the importance of considering iron corrosion when evaluating processes that control lead concentrations in tap water.

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Details

Published: Jul 01, 2020
Vol/Issue: 2(4)
License: View

Authors

Y

Yeunook Bae

Department of Energy, Environmental, and Chemical Engineering Washington University in St. Louis St. Louis Missouri; Department of Preventive Medicine Northwestern University, Feinberg School of Medicine Chicago Illinois

J

Jill D. Pasteris

Department of Earth and Planetary Sciences Washington University in St. Louis St. Louis Missouri

D

Daniel E. Giammar

Department of Energy, Environmental, and Chemical Engineering Washington University in St. Louis St. Louis Missouri

Funding

National Science Foundation Award: CBET‐1603717

Water Research Foundation Award: 4686

Cite This Article

Yeunook Bae, Jill D. Pasteris, Daniel E. Giammar (2020). Impact of iron‐rich scale in service lines on lead release to water. AWWA Water Science, 2(4). https://doi.org/10.1002/aws2.1188

Impact of iron‐rich scale in service lines on lead release to water

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