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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 12, No. 8, 2015, pp. 2447-2454
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Bioline Code: st15230
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 12, No. 8, 2015, pp. 2447-2454
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Water displacement by surfactant solution: an experimental study to represent wastewater loss from sewers to saturated soil
Nikpay, M.; Lazik, D. & Krebs, P.
Abstract
Leakage of wastewater from sewer lines may
result in contamination of soil and groundwater. Our
investigation dealt with the effects of surfactant as one of
the constituents of wastewater on the infiltration process of
wastewater through soil. To that aim, in a laboratory
experiment, a column was uniformly packed with glass
beads of 0.25–0.50 mm diameter and equipped with sensors
to measure local fluid pressure at three observation
points along the direction of flow. The artificial laboratory
wastewater was created by adding a commercially available
detergent to degassed tap water producing surfactant
concentrations between 8 and 16 mg l-1. The displacement
process of degassed tap water by such a particle-free artificial wastewater was studied by loading the surfactant
solution into the saturated glass beads column. Short-term
pressure changes were observed while the interface
between water and surfactant solution passed the observation
points within the column. The pressure peaks
increased for higher surfactant concentrations. The theory
of growing interface between surfactant solution and clean
water by aggregation of monomers to a double layer could
be supported by the column experiments.
Keywords
Wastewater exfiltration; Interface; Sewer; Interfacial tension
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