Investigations on the Effects of Microorganisms on Coarse Grained Soil
The association of soil and microorganisms is known to be existent since the formation of earth. However, conventional geotechnical engineering practices has only considered mechanical loading on the soil without taking into account of the biological aspects that might be associated. Keeping this in view, the present research was designed to study the impact of biological loading on the geo-material. Bacterium Proteus vulgaris was inoculated and incubated with two coarse grained soil samples namely, standard sand and aeolian sand and the effects of bacteria on soil samples were observed. Also, efforts were made to develop a protocol that could be used to establish bio-geo interface in coarse-grained geo-materials. However, long term and in-depth study is essential in this aspect to have a clear and broader image of the interaction, which could have prospective application in geo-technical engineering.
KeywordsBio-geo interface Coarse grained soils Aeolian sand SEM Proteus vulgaris
The authors would like to acknowledge Dr. Kiran Kondabagil and Dr. Prashant Phale, Department of Biosciences and Bioengineering, IIT Bombay, India for providing the lab facilities and their valuable suggestions.
- 3.Shreedhar, S., Devasya, R.P., Naregundi, K., Young, C.C., Bhagwath, A.A.: Phosphate solubilizing uranium tolerant bacteria associated with monazite sand of a natural background radiation site in South-West coast of India. Ann. Microbiol. 64, 1683–1689 (2014). doi: 10.1007/s13213-014-0812-4 CrossRefGoogle Scholar
- 15.Lambert, J.W.M., Novakowski, K., Blauw, M., Latil, M.N., Knight, L., Bayona, L.: Pamper bacteria, they will help us: application of biochemical mechanisms in geo-environmental engineering. In: GeoFlorida 2010: Advances in Analysis, Modeling & Design, pp. 618–627 (2010). doi: 10.1061/41095(365)59
- 16.ASTM D5550-14. Standard Test Method for Specific Gravity of Soil Solids by Gas Pycnometer, ASTM International, West Conshohocken, PA (2014)Google Scholar