Permanganate Treatment of DNAPLs in Reactive Barriers and Source Zone Flooding Schemes

Schwartz, Frank W. ; Lee, Eung Seok

Ohio State University

关键词: Fluid Flow;    Tanks;    Hydraulics;    Dissolution;    Permanganates;   

DOI  :  10.2172/833723
RP-ID  :  EMSP-73745-2001
RP-ID  :  FG07-00ER15115
RP-ID  :  833723

美国|英语

来源: UNT Digital Library

【 摘 要 】

We are conducting basic research on a new delivery scheme that involves mixing the appropriate quantity of KMnO{sub 4} as a solid into the zone of DNAPL contamination. This scheme takes advantage of the tendency for reaction products to reduce the permeability of the treatment zone, which will control the dissolution of the solid and keep the MnO{sub 4}{sup -} in contact with the DNAPL. What needs to be determined, however, is how various solid forms of KMnO{sub 4} behave in porous media and dissolve under the combined influence of fluid flow and MnO{sub 2} precipitation. The goals of this study are to (1) to elucidate the dissolution/reaction processes accompanying the amendment of media containing chlorinated solvents with KMnO{sub 4} and (2) to assess the potential for solid KMnO{sub 4} amendments as a scheme to clean up source zones. This research involves a combined experimental/modeling study that builds on our previous DOE-sponsored work in understanding of how KMnO{sub 4} can be used with in situ cleanups of contaminated sites. The specific objectives of this study are (1) to describe through column experiments how solid forms of potassium permanganate (KMnO{sub 4}) behave in saturated media with and without TCE and PCE. (2) to undertake flow tank studies that examine the hydraulic impact of reaction products (especially MnO{sub 2}) on the flux of water through the zone of contamination, and (3) to represent the process understanding in flow and transport models that demonstrate the potential applicability of the approach.