Resolving the Impact of Biological Processes on DNAPL Transport in Unsaturated Porous Media through Nuclear Magnetic Resonance Relaxation Time Measurements

Hertzog, Russel ; Geesey, Gill G.

Idaho National Engineering and Environmental Lab., Idaho Falls, ID

关键词: Protons;    Relaxation;    Transport;    Soils;    Nuclear Magnetic Resonance;   

DOI  :  10.2172/838680
RP-ID  :  EMSP-86804--2004
RP-ID  :  838680

美国|英语

来源: UNT Digital Library

【 摘 要 】

This research leads to a better understanding of how physical and biological properties of porous media influence water and dense non-aqueous phase liquid (DNAPL) distribution under saturated and unsaturated conditions. This project exploits the capability of low-field nuclear magnetic resonance (NMR) proton relaxation decay-rate measurements for determining environmental properties affecting DNAPL solvent flow in the subsurface, including determining if DNAPL exist in water-wet or solvent-wet environments, the pore-size distribution of the soils containing DNAPLs, and the impact of biological processes on their transport mechanisms in porous media. Knowledge of the in-situ flow properties and pore distributions of organic contaminants are critical to understanding where and when these fluids will enter subsurface aquifers.