HEAVY METAL CONCENTRATIONS OF LEACHATE FROM FLY ASH FILLS IN LOUISIANA

The Louisiana Department of Transportation and Development, having an acute awareness of the potential of landfilled industrial wastes to pollute groundwater, conducted a laboratory leachate experiment to determine if self-setting fly ash poses such a pollution problem. Ten fly ash models were constructed, using fly ash samples taken from the two sources for the Louisiana DOTD, to determine whether leachable metals are available in self-setting fly ash to pollute groundwaters. Chromium was the only trace metal leached out of the fly ash and even in this case, the leachate chromium concentration is only three times greater than the Environmental Protection Agency's National Interim Primary Drinking Water Standard. Data from this study indicates that the environmental reservations about using fly ash for backfill construction purposes should be reduced for self-setting fly ash. (FHWA)

• Record URL:
  http://www.ltrc.lsu.edu/pdf/2008/Report%20155.pdf
• 
• Corporate Authors:

  Louisiana Department of Transportation and Development

  1201 Capitol Access Road, P.O. Box 94245
  Baton Rouge, LA  United States  70804-9245

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Graves, W E
  • Clement, K A
• Publication Date: 1982-4

Media Info

• Pagination: n.p.

Subject/Index Terms

• TRT Terms: Backfilling; Chromium; Concentration (Chemistry); Fly ash; Groundwater; Leachate; Metals; Pollutants; Water pollution
• Uncontrolled Terms: Concentration
• Old TRIS Terms: Backfills
• Subject Areas: Design; Environment; Geotechnology; Highways; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00373125
• Record Type: Publication
• Report/Paper Numbers: FHWA/LA-82/155 Final Rpt.
• Contract Numbers: 81-1CH(B)
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jun 30 1983 12:00AM