Experimental investigation of enhanced remediation of contaminated soil using ultrasound effect

  • Abstract
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  • References
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  • Abstract

    In the development of an effective ground remediation method, there has been significant research focusing on the technique of enhancing soil-flushing method The soil flushing method enhanced by ultrasonic waves is a new technique that is potentially an effective method for in situ remediation of the ground contaminated by NAPL hydrocarbons. The research work investigated the effectiveness of sonication in the soil flushing method for a range of conditions involving treatment time, hydraulic gradient and the discharge velocity. The experimental investigation of the study was conducted using the inbuilt ultrasonic generator (NEE 555 timer stable multi-vibrator) and soil flushing apparatus to remove the contaminant from the soils. The test result indicated that the rate of the contaminant extraction increased considerably with increasing sonication time up to 120seconds with 34% contaminant removed without sonication and 64.05% contaminant removed with sonication and started decreasing at the level where cavitation occurred. Increasing the sonication time also increase the contaminant removal up to the level where cavitation occurs. The effectiveness of sonication decreases with hydraulic gradient but eventually becomes constant under higher flow rates and also is highly related with the discharge velocity. Results obtained showed that sonication can enhance pollutant removal.

    Keywords: Soil-Flushing Method, NAPL Hydrocarbons, Sonication, Soil Remediation, Cavitation.

  • References

      Hyman, M. Norman, R.R. and Reidy, E.SGroundwater and soil remediation process design and cost.Pg 176189, 2001. M.L. Surguchev and E.M. Simkin Advanced vibroseismic action on an oil-bearing bed, Journal of Engineering Physics and Thermophysics 64(4) Pg 355-359, 1991.
    1. Johnston, H. K., II. "Polymer Viscosity Control by the Use of Ultrasonics." Chemical Engineering Progress Symposium Series 67, Pg 39-45, 2004.
    2. Poesio, P. and Ooms, G "Formation and Ultrasonic Removal of Fouling Particle Structures in a Natural Porous Material." Journal of Petroleum Science and Engineering 45(3-4): Pg159-178, 2004.
    3. Gadiev, S. M. "Use of Vibrations in Oil Production (IspolzovaniyeVibratsii DobycheNefti)." Moscow, Nedra Press, 2003.
    4. Cleveland, T.G, Garg, S. Field demonstration of acoustically enhanced soil washing system for in-situ treatment of low-permeability soils, in:, Pg 519-520,2003.
    5. Reddi, L.N., Wu, H. Mechanism involved in vibratory destabilization of NAPL ganglia in sands, Journal of Environmental Engineering, ASCE 122 (12). Pg 1115-1119, 1995.
    6. Reddi, L.N., S. Challa Vibratory mobilization of immiscible liquid ganglia in sands, Journal of Environmental Engineering, ASCE 120 (5). Pg 1170-1190,1994.
    7. Kim, Y.U., and Wang, M.CEffect of ultrasound on oil removal from soils. Ultrasonics 41:Pg539-542, 2003.
    8. T.V. Ellen C.J.E. Lansink, J.E. Sandker Acoustic soil remediation:introduction of a new concept, Contaminated soil 95, Pg 1193-1194, 1995.
    9. J.L. Iovenitti, T.M., Rynne, J.W. Spencer Jr., Acoustically enhanced remediation of contaminated soil and ground water, in:Proceedings of Opportunity 95-Environmental Technology through Small business , Morgantown, West Virginia, 1995.




Article ID: 1103
DOI: 10.14419/ijet.v3i3.1103

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