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Identification and Characterization Methods for Reactive Minerals Responsible for Natural Attenuation of Chlorinated Organic Compounds in Ground Water
Citation:
Yongtian, H., C. SU, J. T. WILSON, R. T. WILKIN, C. J. ADAIR, T. R. LEE, P. Bradley, AND M. Ferrey. Identification and Characterization Methods for Reactive Minerals Responsible for Natural Attenuation of Chlorinated Organic Compounds in Ground Water. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/115, 2010.
Impact/Purpose:
To describe and evaluate the various analytical methods that are available to recognize or characterize reactive minerals.
Description:
Over the past decade, there has been a growing awareness of the contribution of abiotic processes to the natural degradation of chlorinated organic contaminants in aquifer material. These abiotic processes contribute to risk management of the contaminants through monitored natural attenuation (MNA) as well as active remediation. This report describes the degradation of halogenated organic contaminants such as PCE, TCE, cis-DCE, vinyl chloride, 1,1,1-TCA, 1,2-DCA, EDB and carbon tetrachloride on mackinawite (FeS), pyrite (FeS2), magnetite (Fe3O4), green rusts, and phyllosilicate clay minerals. The report describes the products of degradation and tabulates available information on rate constants for degradation on these reactive minerals. It considers the influence of the specific surface area of the minerals, of pH and the concentration of Fe+2 and HS-1 in solution on the rate of reaction. It describes the fractionation of stable carbon isotopes in halogenated organic compounds during abiotic degradation. It evaluates the usefulness of geochemical models to predict the formation and stability of reactive minerals. Finally, this report describes and evaluates the various analytical methods that are available to recognize or characterize reactive minerals. This report covers a period from October 1999 to September 2009.
URLs/Downloads:
IDENT & CHAR METH FOR REACT MINERALS RESPON FOR NAT ATTEN OF CHLORIN ORG COMP IN GRD WTRAbstract
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