Methodology for Assessing the Gas Composition of Soils

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Abstract

The subject of this work is the development of a methodology for conducting research on the concentrations of methane, carbon dioxide, oxygen and hydrogen in soils and soils in areas of upcoming construction. The developed methodology, after its certification in accordance with GOST R 8.563-2009, can be used in areas of upcoming construction during engineering surveys, with subsequent adoption of design decisions based on the measurement results. The purpose of this work is the development and experimental research in laboratory conditions of a methodology for examining a work site. The main tasks are: analysis of archival and stock materials, normative and technical documentation, published works; development and production of sampling equipment; development of “Methods for measuring the volume fractions of carbon dioxide, methane, oxygen and hydrogen in soil air using portable gas analyzers” in accordance with Appendix B to GOST R 8.563-2009; setting up and conducting experimental studies in laboratory conditions. Research results: – the equipment necessary for sampling ground air: a sampling probe with an adjustable sampling depth and a storage pump that allows you to take a sample from depth, accumulate it in a chamber, transfer the sample to a gas analyzer, with the ability to “loop” the air flow and supply air to gas analyzers without a built-in pump; – a draft methodology “Methodology for measuring the volume fractions of carbon dioxide, methane, oxygen and hydrogen in soil air using portable gas analyzers”; – an experimental assessment of the method quality indicators (repeatability and intra-laboratory precision) in laboratory conditions; – conclusions about the need to certify the methodology for compliance with GOST R 8.563-2009 using state standard samples (SSO) in the form of cylinders containing pure gases or gas mixtures with a known concentration of gases.

Keywords

gas geochemical studiessoil airsoilsmethanecarbon dioxideoxygenhydrogensampling equipmentgas analyzermethodologysamplinganalysisengineering and environmental surveysmeasurement resultsaccuracy indicators.

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Article information

Published
22 March 2024
Issue date
22 March 2024
Issue
Vol. 23, No. 2 (2023)
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