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Desorption of Arsenic from Drinking Water Distribution System Solids
Citation:
LATHAM, M. AND D. A. LYTLE. Desorption of Arsenic from Drinking Water Distribution System Solids. U.S. Environmental Protection Agency, Washington, DC, EPA/600/F-10/002, 2010.
Impact/Purpose:
To share information
Description:
Given the limited knowledge regarding the soluble release of arsenic from DWDS solids, the objectives of this research were to: 1) investigate the effect of pH on the dissolution/desorption of arsenic from DWDS solids, and 2) examine the effect of orthophosphate on the soluble release of arsenic from DWDS into the water at pH 7, 8 and 9. Desorption experiments were conducted on distribution system solids collected from Midwest water utilities. The utilities were selected because they had measurable levels of arsenic in their drinking water. The treatment processes for each utility played an important role in understanding scale formation and elemental composition. The study investigated the mineralogy and elemental composition of the test solids; the effect of time and pH on arsenic release; arsenic release in the presence of orthophosphate; and, additional element release.
URLs/Downloads:
DESORPTION OF ARSENIC FROM DRINKING WATER DISTRIBUTION SYSTEM SOLIDSFact Sheet (PDF, NA pp, 202 KB, about PDF)