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Effect of Greywater Irrigation on Air-Water Interfacial area in Porous Medium

Authors: A. H. M. Faisal Anwar

Abstract:

In this study, the effect of greywater irrigation on airwater interfacial area is investigated. Several soil column experiments were conducted for different greywater irrigation to develop the pressure-saturation curves. Surface tension was measured for different greywater concentration and fitted for Gibbs adsorption equation. Pressure-saturation curves show that the reduction of capillary rise stops when it reaches its critical micelle concentration (CMC). A simple theory is derived from pressure-saturation curves for calculating air-water interfacial area in porous medium during greywater irrigation by introducing a term 'hydraulic radius' for the pores. This term diminishes any effect of pore shapes on the air-water interfacial area. The air-water interfacial area was calculated using the pressure-saturation curves and found that it decreases with increasing moisture content. But no significant effect was observed on air-water interfacial area for different greywater irrigation. A maximum of 10% variation in interfacial area was observed at the residual saturation zone.

Keywords: irrigation, porous medium, surface tension, greywater, Interfacial area

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1057099

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References:


[1] Travis, M.J., Weisbrod, N. and Gross, A., Accumulation of oil and grease in soils irrigated with greywater and their potential role in soil water repellency, Sci. Total Environ., 2008, vol. 394(1), pp. 68-74.
[2] Friedler, E., Quality of individual domestic greywater streams and its implication for on-site treatment and reuse possibilities, Environ. Technol. 2004, vol. 25(9), pp. 997-1008.
[3] DHWA (Deaprtement of Health Western Australia), Code of Practice for the reuse of greywater in Western Australia, 2005.
[4] Shafran, A.W., Gross, A., Ronen, Z., Weisbrod, N. and Adar, E., Effects of surfactants originating from reuse of greywater on capillary rise in the soil, Water Sci. & Technol., 2005, vol. 52(10-11), pp. 157-166.
[5] Shafran, A.W., Ronen, Z., Weisbrod, N., Adar, E. and Gross, A., Potential changes in soil properties following irrigation with surfactantrich greywater, Ecol. Eng. 2006, vol. 26(4), pp. 348-354.
[6] Abu-Zreig, M., Rudra, P.R. and Dickinson, T.W., Effect of application of surfactants on hydraulic properties of soils", Biosyst. Eng., 2003, vol. 84(3), pp. 363-372.
[7] Anwar, A.H.M.F., Bettahar, M. and Matsubayashi, U., A method for determining air-water interfacial area in variably saturated porous media. J. of Contam. Hydrol., 2000, vol. 43(2), pp. 129-146.
[8] Anwar, A.H.M.F., Effect of Greywater Irrigation on Soil Characteristics, In Proc. of Int. Conf. Environ. Sci. & Develop (CD-ROM), Mumbai India, pp. 15-18, January, 2011.
[9] Misra, R.K. and Sivongxay, A., Reuse of laundry greywater as affected by its interaction with saturated soil, J. of Hydrol., 2009, vol. 366(1-4), pp. 55-61.
[10] Bradford, S. A. and Leij, F. J., Estimating interfacial areas for multifluid soil systems. J. of Contam. Hydrol., 1997, vol. 27, pp. 83-105.
[11] Reeves, P. C. and Celia, M. A., A functional relationship between capillary pressure, saturation and interfacial area as revealed by a porescale network model. Water Resour. Res., 1996, vol. 32(8), 2345-2358.
[12] Kawanishi, T., Hayashi, W., Roberts, P. V. and Blunt, M. J., Fluid-fluid interfacial area during two and three phase fluid displacement in porous media: A network model study. Proc. of the GQ-98 conf. on Groundwater quality: Remediation and Protection, Tubingen, Germany. IAHS publ., 1998, no. 250, pp. 89-96.
[13] Skopp, J., Oxygen uptake and transport in soils: Analysis of the airwater interfacial area. Soil Sci. Soc. Am. J., 1985, vol. 49(6), pp. 1327- 1331.
[14] Miller, C. T., Poirier-McNeill, M. M. and Mayer, A.S., Dissolution of trapped nonaqueous phase liquids: Mass transfer characteristics. Water Resour. Res., 1990, vol. 26(11), pp. 2783-2796.
[15] Cary, J. W., Estimating the surface area of fluid phase interfaces in porous media. J. of Contam. Hydrol., 1994, vol. 15, pp. 243-248.
[16] Karkare, M. V. and Fort, T., Determination of the air-water interfacial area in wet unsaturated porous media. Langmuir, 1996, vol. 12(8), pp. 2041-2044.
[17] Kim, H., Rao, P. S. C. and Annable, M. D., Determination of effective air-water interfacial area in partially saturated porous media using surfactant adsorption. Water Resour. Res., 1997, vol. 33(12), pp. 2705- 2711.
[18] Schaefer, C. E., D. A. DiCarlo, and M. J. Blunt, Experimental measurement of air-water interfacial area during gravity drainage and secondary imbibitions in porous media, Water Resour. Res., 2000, vol. 36, pp. 885- 890.
[19] Montemagno, C. D., and W. G. Gray, Photoluminescent volumetric imaging: A technique for the exploration of multiphase flow and transport in porous media, Geophys. Res. Lett., 1995, vol. 22(4), pp. 425- 428, doi:10.1029/ 94GL02697
[20] Culligan, K. A., D. Wildenschild, B. S. B. Christensen, W. G. Gray, M. L. Rivers, and A. F. B. Tompson, Interfacial area measurements for unsaturated flow through a porous medium, Water Resour. Res., 2004, vol. 40, W12413, doi:10.1029/2004WR003278.
[21] Brusseau, M. L., S. Peng, G. Schnaar, and A. Murao, Measuring airwater interfacial areas with X-ray microtomography and interfacial partitioning tracer tests, Environ. Sci. Technol., 2007, vol. 41, pp. 1956– 1961.
[22] Costanza-Robinson, M. S., K. H. Harrold, and R. M. Lieb-Lappen, Xray microtomography determination of air-water interfacial area-water saturation relationships in sandy porous media, Environ. Sci. Technol., 2008, vol. 42, pp. 2949–2956.
[23] Anwar, A. H. M. F. and Matsubayashi, U., Method of estimating airliquid interfacial area using soil characteristics curve. J. of Groundwater Hydrol., 2000, vol. 42(2), pp. 159-174.
[24] Dullien, F. A. L., Porous media: Fluid transport and pore structure. Academic, New York, 1979.
[25] Rosen, M. J., Surfactant and interfacial phenomena. John Wiley, New York, 1989.
[26] Lanfax Lab, http://www.lanfaxlabs.com.au/ (accessed August 15, 2010)