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Issue 6, 2013
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Evaluation of the age of landfill gas methane in landfill gas–natural gas mixtures using co-occurring constituents

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Abstract

At a municipal solid waste landfill in southern California (USA) overlying a natural gas reservoir, methane was detected at concentrations of up to 40% (by volume) in perimeter soil gas probes. Stable isotope and 14C values of methane together with gas composition (major components and volatile organic compounds) data were evaluated to assess the relative contributions of landfill gas and natural gas to the measured methane concentrations. The data was further used to estimate the residence time of the landfill gas in the probes. Results showed that up to 37% of the measured methane was derived from landfill gas. In addition, the landfill gas in the probe samples has undergone extensive alteration due to dissolution of carbon dioxide in pore water. Data further indicates that the measured methane was released from the waste approximately 1.2 to 9.4 years ago, rather than representing evidence of an ongoing release.

Graphical abstract: Evaluation of the age of landfill gas methane in landfill gas–natural gas mixtures using co-occurring constituents

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Publication details

The article was received on 18 Dec 2012, accepted on 28 Mar 2013 and first published on 28 Mar 2013


Article type: Paper
DOI: 10.1039/C3EM30971A
Citation: Environ. Sci.: Processes Impacts, 2013,15, 1153-1161
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    Evaluation of the age of landfill gas methane in landfill gas–natural gas mixtures using co-occurring constituents

    H. B. Kerfoot, B. Hagedorn and M. Verwiel, Environ. Sci.: Processes Impacts, 2013, 15, 1153
    DOI: 10.1039/C3EM30971A

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