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Environmental Factors Influencing Attenuation of Methane and Hydrochlorofluorocarbons in Landfill Cover Soils

Environment & Resources, Bygningstorvet-Building 115, Technical University of Denmark, DK-2800 Lyngby, Denmark

View larger version (33K): [in a new window]   Fig. 1. Headspace concentration of gas components in a soil microcosm experiment as function of time. (A) Methane, oxygen, and carbon dioxide. (B) Hydrochlorofluorocarbons HCFC-21 and HCFC-22.

View larger version (28K): [in a new window]   Fig. 2. Oxidation rates as a function of initial gas concentrations. (A) Methane. (B) Hydrochlorofluorocarbons HCFC-21 and HCFC-22.

View larger version (31K): [in a new window]   Fig. 3. (A) Influence of increasing initial hydrochlorofluorocarbon (HCFC) concentrations on the methane oxidation rate. (B) Influence of increasing initial methane concentrations on degradation rate of HCFCs.

View larger version (26K): [in a new window]   Fig. 4. Influence of temperature on the oxidation rate of methane and hydrochlorofluorocarbons (HCFCs).

View larger version (26K): [in a new window]   Fig. 5. Influence of soil moisture content on the oxidation rate of methane and hydrochlorofluorocarbons (HCFCs).

View larger version (23K): [in a new window]   Fig. 6. Influence of soil acidity on the oxidation rate of methane and hydrochlorofluorocarbons (HCFCs).

View larger version (24K): [in a new window]   Fig. 7. Influence of copper on the oxidation rate of methane and hydrochlorofluorocarbons (HCFCs).

View larger version (25K): [in a new window]   Fig. 8. Influence of ammonium on the oxidation rate of methane and hydrochlorofluorocarbons (HCFCs).