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RECORD NUMBER: 3 OF 7

OLS Field Name OLS Field Data
Main Title Demonstration of Low-Cost Arsenic Removal from a Variety of Illinois Drinking Waters.
Author G. R. Peyton ; T. R. Holm ; J. Shim
CORP Author Midwest Technology Assistance Center (MTAC), Champaign, Illinois.; Illinois Univ. at Urbana-Champaign. Dept. of Civil and Environmental Engineering.; Illinois State Water Survey Div., Champaign. Center for Watershed Science.; Environmental Protection Agency, Chicago, IL. Region V.
Year Published 2006
Report Number MTAC-TR06-11; EPA-X829218-01; ISWS-2006-08
Stock Number PB2009-103951
Additional Subjects Potable water ; Field tests ; Public water systems ; Environmental protection ; Decontamination ; Arsenic ; Research and development ; Illinois ; Water treatment plants ; Jar test ; Anionic exchange ; Water treatment ; Fenton filtration ; Danvers(Illinois)
Holdings
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NTIS  PB2009-103951 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 05/12/2010
Collation 30p
Abstract
Four groundwater sources used as drinking water in Illinois were treated using the Fenton reaction (hydrogen peroxide + Fe(II)) to oxidize As(III) to As(V) before adsorption of the arsenic to the iron precipitate produced during iron removal by aeration/filtration. For all four waters used, the arsenic concentration could be reduced to below the 10 microgram/liter maximum contaminant level using relatively inexpensive doses of iron and peroxide, despite the need to add iron (Fe(II) or Fe(III) were both tried) in all cases to completely adsorb the arsenic. The waters differed in their treatability, but in each case, the least expensive configuration used Fe(III) rather than Fe(II). It was shown that consumption of reactive species by reaction with Fe(II) was a very significant sink for Fe(II) at higher iron concentrations, and was primarily responsible for the difference in efficiency using Fe(II) and Fe(III). Peroxide doses greater than 20-27 micromolar improved arsenic removal in Monticello and Dwight water, but not in Danvers water. In most cases, the treatability of the waters did not appear to correlate negatively with the alkalinity, phosphate, silicate, or organic content of the waters. A correlation was expected because of the known competition between arsenic and the other natural solutes for both sorption sites and reactive species generated during the Fenton reaction. Chemical addition in the range of 3-6.4 milligrams per liter Fe(III) and 20-45 micromolar (0.68-1.5 milligrams/liter) peroxide was adequate to reduce the total arsenic to the maximum contaminant level in all four waters. The estimated chemical cost was $0.04 to $0.07 per thousand gallons in the most favorable cases for each water.