HR: 1400h
AN: H33B-07    [Abstracts]
TI: Transport of TNT and DNT in Soil Under Infiltration and Evaporation Events
AU: * Padilla, I Y
EM: padillai@uprm.edu
AF: Department of Civil Engineering, University of Puerto Rico, Mayaguez, PO Box 9041, Mayaguez, PR 00681,
AU: Gutierrez, J P
EM: juanpaguma@hotmail.com
AF: Department of Civil Engineering, University of Puerto Rico, Mayaguez, PO Box 9041, Mayaguez, PR 00681,
AB: The effects of water infiltration and evaporation on the fate and transport of explosive-related chemicals (ERCs) in soils were studied. The experiments were conducted in a 100 cm uniform cylindrical sand column packed with homogeneous sand, and instrumented with air and water pressure sensors and sampling ports to monitor hydraulic conditions and ERCs concentration profiles in soil. TNT and DNT crystals were placed in a porous membrane and buried as a point source near the surface of the soil. Infiltration of water containing a conservative tracer was followed by evaporation periods. Spatial and temporal concentration distributions of conservative solutes were used to determine physical transport parameters of the soil under different water contents and flow conditions. Results indicate that physical transport is spatially variable and that TNT and DNT transport is rate- limited. Evaporation events result in accumulation of salts near the surface of the soil, thus affecting the fate and transport of ERCs.
DE: 0499 New fields (not classifiable under other headings)
DE: 1832 Groundwater transport
DE: 1875 Vadose zone
SC: Hydrology [H]
MN: 2007 Joint Assembly