Application of nanotechnology in removal of NAPLs from contaminated aquifers: a source clean-up experimental study
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This work investigates the removal of non-aqueous phase liquids (NAPLs) from groundwater resources using nanotechnology. We present results of a series of multiphase fluid displacement experiments conducted in a naturally occurring sandstone rock. These experiments involve injection of an aqueous suspension of silica nanoparticles to remove a trapped NAPL phase. Specifically, the effect of nanoparticle concentration on the efficiency of the NAPL removal is studied. Our results show that silica nanoparticles successfully remobilised the trapped NAPL phase and resulted in 13% increase in its removal efficiency. The optimal concentration for NAPL removal efficiency is found to be 0.3 wt%.
KeywordsNanotechnology Porous media Removal of organic contaminants Non-aqueous phase liquids (NAPLs)
This project was partly supported by the Royal Academy of Engineering under the Newton Research Collaboration Programme (Academy Reference: NRCP1516/1/159). We thank Jeffrey Lawrence, Marwan Rezk, and Richard Medd for their helps in SEM imaging and Zeta potential measurements.
- Bardos R et al (2011) A risk/benefit approach to the application of iron nanoparticles for the remediation of contaminated sites in the environment. http://eprints.brighton.ac.uk/14887/1/CB0440FInalReport.pdf. Accessed 31 July 2017
- Bennetzen MV, Mogensen K (2014) Novel applications of nanoparticles for future enhanced oil recovery. In: International petroleum technology conference, pp 10–12. https://doi.org/10.2523/17857-ms
- Craig FF (1971) The reservoir engineering aspects of waterflooding. H. L. Doherty memorial fund of AIME. http://store.spe.org/The-Reservoir-Engineering-Aspects-Of-Waterflooding–P68.aspx. Accessed 21 May 2017
- Li S, Torsæter O (2015) The impact of nanoparticles adsorption and transport on wettability alteration of intermediate wet berea sandstone. In: SPE-172943-MS. SPE. https://www.onepetro.org/download/conference-paper/SPE-172943-MS?id=conference-paper%2FSPE-172943-MS. Accessed 4 May 2017
- Ogolo N, Olafuyi O, Onyekonwu M (2012) Enhanced oil recovery using nanoparticles. In: Saudi Arabia section technical symposium and exhibition, p 9. https://doi.org/10.2118/160847-ms
- Pak T (2015) Saturation tracking and identification of residual oil saturation. The University of Edinburgh. https://www.era.lib.ed.ac.uk/handle/1842/17872. Accessed 4 May 2017
- Pak T et al (2015) Droplet fragmentation: 3D imaging of a previously unidentified pore-scale process during multiphase flow in porous media. Proc Natl Acad Sci 112(7):1947–1952. http://www.pnas.org/content/112/7/1947.abstract
- Wilson J (1990) Laboratory investigation of residual liquid organics from spills, leaks, and the disposal of hazardous wastes in groundwater. In: Kerr R (ed) Environmental Research Laboratory, Office of Research and Development, US Environmental Protection Agency, 1990. https://books.google.co.uk/books?hl=en&lr=&id=wbVNKvmsOxsC&oi=fnd&pg=PR4&dq=Laboratory+investigation+of+residual+liquid+organics+from+spills,+leaks,+and+the+disposal+of+hazardous+wastes+in+groundwater&ots=vrcIBPD7w_&sig=4-29AfAVIZoFxWR9LcZtv3jF7vc. Accessed 14 July 2017