In-situ alcohol flushing of a DNAPL source zone at a dry cleaner site

Article Abstract:

Researchers conducted an alcohol flushing field test for the solubilization and extraction of dense nonaqueous phase liquid (DNAPL) contaminants at a former dry cleaner site in Jacksonville, Florida. The experiment was conducted to evaluate the possibility of remediating DNAPL contamined sites.

United States, Research and Development in the Physical, Engineering, and Life Sciences, Science & research, Pollution Control R&D, Brief Article, Pollution, Pollution control research, Jacksonville, Florida

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Measurement of specific fluid-fluid interfacial areas of immiscible fluids in porous media

Article Abstract:

A new experimental technique for the measurement of the fluid-fluid interfacial areas of immiscible fluids in porous media is presented. Called the Interfacial Tracers Technique, it replaces theoretical estimates that cannot be validated by direct measurements previously used by scientists and engineers. It involves interfacial tracers, or chemical species that accumulate at the non-aqueous-phase-liquid (NAPL)-water interface by adsorption but do not partition into the NAPL or air phase. The new method can be used in groundwater remediation and vadose zone hydrology.

Methods, Usage, Radiochemical analysis, Tracers (Chemistry)

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Influence of air-water interfacial adsorption and gas-phase partitioning on the transport of organic chemicals in unsaturated porous media

Article Abstract:

Air-water interfacial adsorption slows the aqueous-phase transport of n-alcohols by almost 90% at a water saturation of 34% ins and, a water-unsaturated porous medium. The three chlorinated aromatic compounds such as chlorobenzene, used in the study, however, were not slowed by air-water interfacial adsorption but with gas-phase partitioning. Air-water interfacial adsorption did not contribute in slowing the aromatic compound's transport because of slow air-water interfacial area in sand as well as low interfacial-adsorption coefficients.

Basic Chemical Manufacturing, Industrial Organic Chemicals, Organic Chemicals, Sand, Gravel, Clay, and Ceramic and Refractory Minerals Mining and Quarrying, Sand and Gravel, Sand & Gravel, Analysis, Sand and gravel industry, Organic compounds

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