In-situ control of DNAPL density using polyaphrons.

Effects of Areal Orientation on DNAPL Recovery by Neutral Buoyant Co-solvent Flooding

INTRODUCTION Dense non-aqueous phase liquids (DNAPLs) are organic contaminants in ground water characterized by low solubility and density greater than water [1]. DNAPL-contaminated aquifers frequently are treated using the remediation technique known as pump-and-treat [2]. The process can reduce the mass of DNAPL contamination to residual saturations by injecting water though injection wells a...

Use of Laser Induced Fluorescence to Detect DNAPL and Fluorophore Mixtures In-Situ

We present results from laboratory investigations on the fluorescence of Dense NonAqueous Phase Liquids (DNAPL) and fluorophore mixtures, characterized using a Luminescence Spectrometer. Fluorophores such as aromatic compounds (e.g. benzene, toluene, ethylbenzene and xylenes, as well as other constituents of petroleum fuels, oils, lubricants and greases) are present as co-contaminants in many D...

Use of Fluorophore/dnapl Mixtures to Detect Dnapls In-situ

Fluorophores such as aromatic compounds (e.g. benzene, toluene, ethylbenzene and xylenes, as well as other constituents of petroleum fuels, oils, lubricants and greases) are present as co-contaminants in many Dense NonAqueous Phase Liquid (DNAPL) spills or may be extracted by the flowing organic phase from the soil organic matter. From 10 to 25% of the carbon present in humic and fulvic acids (...

Surfactant Enhanced In-situ Remediation of DNAPL Impacted Soil and Groundwater - Montreal Refinery Case Study

A Montreal chemical refinery reduced the dichlorobenzene and other dense non-aqueous phase liquid (DNAPL) impacts on the soil and groundwater where a railway line is adjacent to an above ground storage tank farm. Ivey-sol surfactant mixtures were injected three times during a two week pilot test, into a series of in-situ wells. The soil and groundwater matrix experienced an induced partial vacu...

DOE / ER / 14721 In - Situ , Field Scale Evaluation of Surfactant - Enhanced DNAPL Recovery Using a Single - Well , “ Push - Pull ” Test Final Report