지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Capillary fringe divides the groundwater and the vadose zone controlling the diffusive mass transfer of contaminants and gases. The thickness of capillary fringe is of great importance for the rate of contaminant mass transfer across the capillary fringe. Application of surface active chemicals including surfactants and alcohol-based products into the subsurface environment changes the surface tension of the aqueous phase, which in turn, affects the thickness of the capillary fringe. In this study, a bench-scale model was used to assess the quantitative relationship between the surface tension and the thickness of the capillary fringe. An anionic surfactant (Sodium dodecylbenzene sulfonate, SDBS) and an aqueous solution of ethanol were used to control the surface tension of the groundwater. It was found that the thickness of the capillary fringe is directly proportional to the surface tension. The air entry pressures measured by the Tempe Pressure Cell at different surface tensions using SDBS (200 mg/L) and ethanol (20%, v/v) solutions were in good agreement with the thicknesses of the capillary fringe measured by the model. A simple method to correct the conventional Brooks-Corey model for estimating the air entry pressure was also presented.
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참고문헌 (15)
참고문헌 신청
Affek, H.P. / 1998 / Production of CO2 in the capillary fringe of a deep phreatic aquifer / Water Resour. Res 34:989~996
Baehr, A.L. / 1987 / Selective transport of hydrocarbons in the unsaturated zone due to aqeuous and vapor-phase partitioning / Water Resour. Res 23:1926~1938
Bear, J. / 2010 / Modeling Groundwater Flow and Contaminant Transport, 23rd Volume / Springer
Brooks, M.C. / 2004 / Controlled release, blind test of DNAPL remediation by ethanol flushing / J. Contam. Hydrol 69:281~287
Brooks, R.H. / 1966 / Properties of porous media affecting fluid flow / J. Irrig. and Drainage Div 92:61~88
Baehr, A.L. / 1987 / Selective transport of hydrocarbons in the unsaturated zone due to aqeuous and vapor-phase partitioning / Water Resour. Res 23:1926~1938
Bear, J. / 2010 / Modeling Groundwater Flow and Contaminant Transport, 23rd Volume / Springer
Brooks, M.C. / 2004 / Controlled release, blind test of DNAPL remediation by ethanol flushing / J. Contam. Hydrol 69:281~287
Brooks, R.H. / 1966 / Properties of porous media affecting fluid flow / J. Irrig. and Drainage Div 92:61~88
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