ABSTRACT
Chlorinated hydrocarbons in the environment are generally present in the form of Dense Non-Aqueous Phase Liquids because of their high molecular weight and relatively low solubility in water. One specific chlorinated hydrocarbon of interest is tetrachloroethylene, also known as perchloroethylene (PCE), which is a solvent used in dry cleaning and degreasing. Pump and treat extraction has been the most widely used form of aquifer remediation for PCE contaminated groundwater sites. However, large pumping volumes and long pumping times are required to effectively remediate these sites. To assess the effects of the surfactant, Tween-80, on Granular Activated Carbon adsorption of PCE, batch isotherm tests and packed column tests were performed. Samples of the hexane solution were subsequently analyzed for PCE concentration over time using gas chromatography. Preliminary studies were conducted to assess the feasibility of using air stripping as a means of post-extraction treatment of Surfactant Enhanced Aquifer Remediation wastewater.
