Effect of oil-degrading bacteria on geotechnical properties of crude oil contaminated sand

Abstract

Research Article| August 24, 2018 Effect of Oil-degrading Bacteria On Geotechnical Properties of Crude Oil–contaminated Sand Hossein Soltani-Jigheh; Hossein Soltani-Jigheh Department of Civil Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran Search for other works by this author on: GSW Google Scholar Hamed Vafaei Molamahmood; Hamed Vafaei Molamahmood Department of Civil Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran Search for other works by this author on: GSW Google Scholar Taghi Ebadi; Taghi Ebadi Faculty of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran Search for other works by this author on: GSW Google Scholar Ali Abolhasani Soorki Ali Abolhasani Soorki ACECR-Research Institute of Applied Sciences, Tehran, Iran Search for other works by this author on: GSW Google Scholar Environmental and Engineering Geoscience (2018) 24 (3): 333–341. https://doi.org/10.2113/EEG-1883 Article history first online: 25 Jul 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Hossein Soltani-Jigheh, Hamed Vafaei Molamahmood, Taghi Ebadi, Ali Abolhasani Soorki; Effect of Oil-degrading Bacteria On Geotechnical Properties of Crude Oil–contaminated Sand. Environmental and Engineering Geoscience 2018;; 24 (3): 333–341. doi: https://doi.org/10.2113/EEG-1883 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyEnvironmental and Engineering Geoscience Search Advanced Search Abstract Various materials have conventionally been utilized to improve the geotechnical properties of soils. Recently, utilization of microorganisms to this end has attracted much attention because of its high capabilities. Various oil-degrading bacteria have proven to be effective in degrading crude oil pollution from the soil. However, their effect on geotechnical properties of the soil has not been thoroughly investigated. In this research, various oil-degrading bacteria were employed to degrade crude oil contamination from crude oil–contaminated sandy soil. Then alterations on geotechnical properties of bio-treated sand were ascertained. The results showed that by employing these microorganisms, more than 50 and 80 percent of the crude oil was degraded after 10 and 30 days of bio-treatment, respectively. Moreover, bio-treated samples, which are slightly crude oil contaminated, acquire larger values of maximum dry density and cohesion in comparison to untreated contaminated samples. As treatment time increases, the value of the internal friction angle remains almost constant, and unconfined compression strength slightly increases. Generally, bio-treatment alters the geotechnical properties of the contaminated soil, and the application of bio-treated soil as a road basement in road construction and erosion controller is suggested. You do not currently have access to this article.