Accession Number : ADA586619


Title :   Strontium Concentrations in Corrosion Products from Residential Drinking Water Distribution Systems


Descriptive Note : Journal article


Corporate Author : NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS


Personal Author(s) : Gerke, Tammie L ; Little, Brenda J ; Luxton, Todd P ; Scheckel, Kirk G ; Maynard, J B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a586619.pdf


Report Date : 22 Apr 2013


Pagination or Media Count : 8


Abstract : The United States Environmental Protection Agency (US EPA) will require some U.S. drinking water distribution systems (DWDS) to monitor nonradioactive strontium (Sr2+) in drinking water in 2013. Iron corrosion products from four DWDS were examined to assess the potential for Sr2+ binding and release. Average Sr2+ concentrations in the outermost layer of the corrosion products ranged from 3 to 54 mg kg -1 and the Sr2 + drinking water concentrations were all /=0.3 mg L -1. Micro-X-ray adsorption near edge structure spectroscopy and linear combination fitting determined that Sr2+ was principally associated with CaCO3. Sr2+ was also detected as a surface complex associated with -FeOOH. Iron particulates deposited on a filter inside a home had an average Sr2+ concentration of 40.3 mg kg -1 and the associated drinking water at a tap was 210 g L -1. The data suggest that elevated Sr2+ concentrations may be associated with iron corrosion products that, if disturbed, could increase Sr2+ concentrations above the 0.3 g L -1 US EPA reporting threshold. Disassociation of very small particulates could result in drinking water Sr2+ concentrations that exceed the US EPA health reference limit (4.20 mg kg -1 body weight).


Descriptors :   *DRINKING WATER , *STRONTIUM , CONCENTRATION(COMPOSITION) , CORROSION , FILTERS , IRON , PHYSICOCHEMICAL PROPERTIES , SAMPLING , SEDIMENTS , WATER DISTRIBUTION


Subject Categories : Metallurgy and Metallography
      Water Pollution and Control


Distribution Statement : APPROVED FOR PUBLIC RELEASE