OLS : Record

RECORD NUMBER: 11 OF 457

Main Title Air Sparging Experiments on a Two Dimensional Sand Box with DNAPLS: Multiphase Investigation with Electrical Impedance Tomography.
Author Cho, J. S.;
CORP Author National Risk Management Research Lab., Ada, OK. Subsurface Protection and Remediation Div.
Publisher 1996
Year Published 1996
Report Number EPA/600/A-96/022;
Stock Number PB96-170451
Subjects Multiphase flow; Environmental transport; Water pollution detection; Subsurface flow; Two dimensional flow; Vapors; Porosity; Soil structure; Tetrachloroethylene; Electrical conductance; Electrical impedence tomography; DNAPL(Dense Nonaqueous Phase Liquids); Air sparging
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB96-170451 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/15/1996
Collation 21p
Abstract Electrical impedance tomography (EIT) applications in detection of organic chemical sources and monitoring subsurface environments during air-sparging were studied. A multiphase flow and transport model was utilized to test the EIT inverse modeling. Tetrachloroethylene (PCE) infiltration was simulated with a multiphase flow model and the ability of EIT to trace the PCE distribution was tested. Computational progress of the inverse solution was presented with a graphical display of electrical conductivity distributions. The inverse program for EIT was used to obtain the electrical conductivity distribution in a 2-D sand box. The experiments included a spillage of dense non-aqueous phase liquid (DNAPL) dyed with a hydrophobic dye at the top of the sand box filled with water and air sparging from the bottom. Electrical conductivity changed in the soil as water was replaced with DNAPL or air.
Category Codes 68D
NTIS Prices PC A03/MF A01
Primary Description 600/15
Document Type NT
Control Number 622000820
Cataloging Source NTIS/MT
Origin NTIS
Type CAT