Role of iron and aluminum coagulant metal residuals and lead release from drinking water pipe materials

Journal Article

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Journal of environmental science and health.Part A, Toxic/hazardous substances & environmental engineering

J.Environ.Sci.Health.A.Tox.Hazard.Subst.Environ.Eng.

414

423

LR: 20160526; JID: 9812551; 0 (Chlorides); 0 (Drinking Water); 0 (Sulfates); 0 (Water Pollutants, Chemical); 2P299V784P (Lead); CPD4NFA903 (Aluminum); E1UOL152H7 (Iron); OTO: NOTNLM; ppublish

England

1532-4117; 1093-4529

PMID: 25723068

eng

Journal Article; Research Support, Non-U.S. Gov't; IM

10.1080/10934529.2015.987550 [doi]

Unknown(0)

25723068

Bench-scale experiments investigated the role of iron and aluminum residuals in lead release in a low alkalinity and high (> 0.5) chloride-to-sulfate mass ratio (CSMR) in water. Lead leaching was examined for two lead-bearing plumbing materials, including harvested lead pipe and new lead: tin solder, after exposure to water with simulated aluminum sulfate, polyaluminum chloride and ferric sulfate coagulation treatments with 1-25-muM levels of iron or aluminum residuals in the water. The release of lead from systems with harvested lead pipe was highly correlated with levels of residual aluminum or iron present in samples (R(2) = 0.66-0.88), consistent with sorption of lead onto the aluminum and iron hydroxides during stagnation. The results indicate that aluminum and iron coagulant residuals, at levels complying with recommended guidelines, can sometimes play a significant role in lead mobilization from premise plumbing.

Knowles,A.D., Nguyen,C.K., Edwards,M.A., Stoddart,A., McIlwain,B., Gagnon,G.A.

a Department of Civil & Resource Engineering , Dalhousie University , Halifax , Nova Scotia , Canada.

http://vp9py7xf3h.search.serialssolutions.com/?charset=utf-8&pmid=25723068

2015