REMEDIATION OF SOILS AND GROUND WATER CONTAMINATED BY AROMATIC AND CHLORINATED HYDROCARBONS AND METALS

Many Indiana Department of Transportation (INDOT) sites are contaminated with aromatic hydrocarbons and chlorinated solvents; these contaminants often occur in the form of non-aqueous phase liquids (NAPLs). Considerable effort has recently been focused on developing in-situ technologies for removing or destroying NAPL source zones, and several potentially viable methods have emerged, including in-situ chemical oxidation (ISCO). The three oxidants that are most often applied in-situ are hydrogen peroxide (H2O2) with iron catalysts, potassium permanganate (KMnO4) and ozone. While each oxidant system has been field demonstrated to be effective in some instances, a clear understanding of these processes is important to the successful implementation of the technology. The primary goal of the laboratory experiments is to evaluate strategies for improving the effectiveness and efficiency of the oxidants as applied at INDOT sites. Several novel approaches have been taken to reach the study goals. The first approach enhances the application of Fenton's reagent in soil slurry systems, resulting in a better understanding of the magnitude of non-specific oxidant losses relative to consumption by the target compounds. The second approach explores minimizing non-specific losses of the oxidant by introducing the oxidant KMnO4 in an encapsulated form. Finally, solubility enhancers are examined to enhance the aqueous NAPL concentrations. Significant enhancements in NAPL aqueous concentration will result in corresponding enhancements of the observed oxidation rate. Based on input from INDOT staff, selected sites will be assessed for amenability to remediation via in-situ oxidation. Site visits will be made to collect soil samples for laboratory experiments.

• Record URL:
  http://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1654&context=jtrp
• 
• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

  Purdue University, School of Civil Engineering
  West Lafayette, IN  United States  47907-1284

  Indiana Department of Transportation

  100 N Senate Avenue
  Indianapolis, IN  United States  46204

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hua, I
  • Rao, P S
  • Lee, L S
• Publication Date: 2004-5

Language

• English

Media Info

• Features: Figures; Tables;
• Pagination: 96 p.

Subject/Index Terms

• TRT Terms: Aromatic hydrocarbons; Chlorides; Contaminants; Demonstration projects; Field tests; Groundwater; Hydrogen peroxide; Laboratory tests; Metals; Oxidation; Oxidizing agents; Ozone; Reagents; Slurry; Soil remediation; Soils; Solubility; Solvents
• Identifier Terms: Indiana Department of Transportation
• Uncontrolled Terms: Non-aqueous phase liquids; Potassium permanganate
• Geographic Terms: Indiana
• Subject Areas: Design; Environment; Geotechnology; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure; I42: Soil Mechanics;

Filing Info

• Accession Number: 00980591
• Record Type: Publication
• Report/Paper Numbers: FHWA/IN/JTRP-2004/1,, Final Report
• Contract Numbers: SPR-2623
• Files: TRIS, USDOT, STATEDOT
• Created Date: Nov 1 2004 12:00AM