期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2012
卷号：3
期号：6
页码：977-1014
出版社：International Energy and Environment Foundation (IEEF)
摘要：In the field of ground-gas monitoring and risk assessment, the concentrations and flows of ground-gas from contaminated sites are usually measured in-situ using handheld or transportable field instruments followed with ex-situ analysis. These portable instruments only give spot data of the gases being monitored and few of their controls. However, and more recently, it has been discovered that ground-gas concentrations and flows are temporarily and spatially variable, with the accompanying realization that the existing instruments are not able to resolve these problems. For example, contaminated sites investigation shows that environment conditions such as pressure, temperature, water level, and air movement substantially affect ground-gas concentrations on the range of timescales, therefore; uncertainty will always exist when using methods that lack temporal resolution. This paper describes the most recent instrumentation that provides real time continuous gas data both inside borehole and ambient air for parameters such as methane, carbon dioxide, volatile organic compounds (VOCs), hydrogen sulfides, oxygen and carbon monoxide alongside atmospheric and borehole pressures. Raw data is presented from field work carried out in 2 landfill sites and 2 peat sites in Manchester, United Kingdom. These datasets are currently being used to derive a methodology for improved prediction of risks due to ground-gases.
