The Experimental Investigation on Transportation Characteristics of LNAPLs in 2-D Porous Sand Tank

Abstract:

This paper is based on a laboratory experiment, investigating the migration mechanism and distribution characteristics of LNAPL in unsaturated layered heterogeneous porous media. At first, LNAPL infiltration experiment was conducted on a 2D sand tank and pictures were taken to record the diffusion process by Auto-CAD; after analyzing the pictures , the infiltration frontal variation pictures in different time were obtained. The results show that when LNAPL reached dry wet interface, due to the effect of capillary water pressure, the infiltration velocity quickened significantly; When entering the lens, because of the different infiltration rate, formed the characteristics of the lens body concave front line.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 967-970
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.967
• Online since: February 2014
• Authors: Han Le Liu*, Li Yun Mo
• Keywords: Distribution Characteristics, Light Non-Aqueous Phase Liquid, Migration Mechanism

References

[1] Borden R C, Gomez C A, Becker M T. Geochemical indicators of intrinsic bioremediation[J]. Ground Water, 1995, 33(2): 180-189.

DOI: 10.1111/j.1745-6584.1995.tb00272.x

[2] Kao C M, Borden R C. Site-specific variability in BTEX biodegradation under denitrifying conditions[J]. Ground Water, 1997, 35(2): 305-311.

DOI: 10.1111/j.1745-6584.1997.tb00087.x

[3] Zheng De-Feng, Zhao Yong-Sheng, Wang Ben-De. Research on the moving behaviors and modeling of light nonaqueous phase liquid in subsurface[J]. Advances in Water Science, 2002, 13(3): 321-325. (in Chinese).

[4] Wu Xiao-Feng, Tang Jie, Yukihisa Fujim a. Study on light non-aqueous phase liquid lens in subsurface water[J]. Environmental Pollution and Control, 2000, 22(3): 17-20. (in Chinese).

[5] Shu Shan-Zhi, Liang Hong-Wei, Yuan Yong. Numerical analysis of transportation and distribution of light non-aqueous phase liquids in partially saturated heterogeneous soils[J]. Journal of Hydraulic Engineering, 2002, (11): 31-37. (in Chinese).

[6] Liu H L, Zhou Q Y, Chen Y D Experiment alin vestigation on the electrical resistivityp roperties of mult-iphase porous media contain ning LNAPL Experimental study [J]. Journal of environmental pollution and prevention , 2010, 32（2): 23-28.

[7] Oostrom，M。，C．Hofstee，andJ. H．Dane，Light nonaqueous－phaseliquidmovement ina variably saturatedsand，Soil Sci．Soc. Am． J. ，1997，61: 1547－1554.

[8] John Deceuster, Olivier Kaufmann: Improving the delineation of hydrocarbon-impacted soils and water through induced polarization (IP) tomographies: A field study at an industrial waste land. Journal of Contaminant Hydrology. Vol. 136-137 (2012).

DOI: 10.1016/j.jconhyd.2012.05.003

[9] Jared K. Pettersson, David C. Nobes: Environmental geophysics at Scott Base: ground penetrating radar and electromagnetic induction as tools for mapping contaminated ground at Antarctic research bases. Cold Regions Science and Technology. Vol. 37 (2003).

DOI: 10.1016/s0165-232x(03)00037-5

[10] F.A. Monteiro Santos, António Mateus, Jorge Figueiras and Mário A. Gonçalves: Mapping groundwater contamination around a landfill facility using the VLF-EM method-A case study. Journal of Applied Geophysics. Vol. 60 (2006), pp.115-125.

DOI: 10.1016/j.jappgeo.2006.01.002