Picture of a black hole

Strathclyde Open Access research that creates ripples...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of research papers by University of Strathclyde researchers, including by Strathclyde physicists involved in observing gravitational waves and black hole mergers as part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) - but also other internationally significant research from the Department of Physics. Discover why Strathclyde's physics research is making ripples...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Optical tests on the slow release of biogenic gas bubbles in sediments

Dyer, M. (2006) Optical tests on the slow release of biogenic gas bubbles in sediments. Journal of ASTM International, 3 (6). pp. 1-6. ISSN 1546-962X

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The anaerobic decomposition of organic matter in marine or fresh water sediments can generate methane, carbon dioxide, hydrogen sulphide, and hydrogen as biogenic gases. In addition, innovative technologies are being used to remediate contaminated sediments and groundwater by releasing biogenic gases from the fermentation of carbon substrates as electron donors. Both scenarios can result in large discrete gas bubbles being present in sediment, which can affect aqueous permeability and mechanical strength. Furthermore the movement of gas bubbles can affect bioavailability as electron donors. In order to investigate bubble dispersion and movement in sediments, a series of novel optical experiments were carried out to observe the release and movement of discrete bubbles in artificial coarse-grained sediment. The results showed that buoyancy-induced movement depended on the clustering together of individual bubbles to achieve a critical depth of gas pocket to overcome the capillary force acting across the pore throat between sediment grains.