Grain-Size Heterogeneity and Subsurface Stratification in Air Sparging of Dissolved-Phase Contamination: Laboratory Experiments-Field Implications

Abstract

Research Article| January 01, 2003 Grain-Size Heterogeneity and Subsurface Stratification in Air Sparging of Dissolved-Phase Contamination: Laboratory Experiments–Field Implications JONATHAN W. PETERSON; JONATHAN W. PETERSON 1Department of Geological and Environmental Sciences, Hope College, 35 E. 12th Street, Holland, MI 49423 Search for other works by this author on: GSW Google Scholar KENT S. MURRAY KENT S. MURRAY 2Department of Natural Science, University of Michigan-Dearborn, 4901 Evergreen Road, Dearborn, MI 48128 Search for other works by this author on: GSW Google Scholar Environmental & Engineering Geoscience (2003) 9 (1): 71–82. https://doi.org/10.2113/9.1.71 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation JONATHAN W. PETERSON, KENT S. MURRAY; Grain-Size Heterogeneity and Subsurface Stratification in Air Sparging of Dissolved-Phase Contamination: Laboratory Experiments–Field Implications. Environmental & Engineering Geoscience 2003;; 9 (1): 71–82. doi: https://doi.org/10.2113/9.1.71 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEnvironmental & Engineering Geoscience Search Advanced Search Abstract Air sparging (AS) laboratory experiments were performed to assess the effects of grain-size heterogeneity and sediment stratification on air-flow geometry and area of impact. Results were interpreted in terms of the three air-flow geometries described in the literature: chamber flow, channelized flow, and pervasive/bubbly flow. Compared to sparging experiments in monostratigraphic layers, AS of coarsening-upward sequences can increase the extent of the sediment column affected by air because of changes in air-flow geometry and/or sparge angle at strata transition boundaries. AS of fining-upward sequences can also increase the extent of sediment affected in an overlying unit in which channelized flow occurs by generating multiple air-source points. Laboratory simulations of the AS injection interval, representative grain size, and stratified saturated zone of a field site were also performed. These experiments indicated the potential occurrence of chamber flow at the site and revealed the effect of pulsed AS. The effect is to fill in areas of the sedimentary column between air-flow chambers that otherwise would not be affected by air during continuous sparging. This phenomenon, observed in the laboratory, is a likely explanation for remediation performance at the site. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.