High rates of methane oxidation and degradation of the lowed halogenated methanes (TCM and DCM) and HCFCs (HCFC-21 and HCFC-22) were found in an investigation of the oxidation of methane and halogenated organic compunds (HOCs) in landfill gas affected soil. The degradation followed zero-order kinetics and occurred in parallel with the oxidation of methane. TeCM, CFC-11, and CFC-12 were not degradable in presence of oxygen and degradation of these compounds in the oxidative zone in landfill top covers is therefore expected to be limited. However these compounds were found degradable in the anaerobic zone in the lower part of soil columns permeated with artificial landfill gas. The lesser-chlorinated compounds were degraded in the upper oxic zone with overlapping gradients of methane and oxygen. Methane oxidation and degradation of HOCs in the top-soils may play a very important role in reducing the emission of both methane and trace components into the atmosphere.
|Title of host publication||Proceedings from the Solid Waste Association of North America's 25th Annual landfill gas Symposium, Monterey, CA March 25-28|
|Place of Publication||Silver Spring, MD|
|Publication status||Published - 2002|
|Event||Solid Waste Association of North America's 25th Annual landfill gas Symposium - |
Duration: 1 Jan 2002 → …
|Conference||Solid Waste Association of North America's 25th Annual landfill gas Symposium|
|Period||01/01/2002 → …|