Destruction of Emerging Contaminants Utilizing Site-Specific In Situ Chemical Remediation Approaches

摘要

Background/Objectives. As the environmental industry attempts to investigate, delineate and remediate common contaminants such as chlorinated solvents and petroleum hydrocarbons, emerging and recalcitrant contaminants continue to reveal themselves across the globe. These contaminants present unique and challenging environmental and health impacts, which are changing existing federal and state guidelines. Sulfolane, 1,4-dioxane and trichlorofluoromethane (Freon) are three emerging contaminants that have been detected at sites in Puerto Rico, North Carolina, and New Jersey, respectively. The three sites have undergone investigation, delineation and some source zone remediation; however, large-scale saturated zone contamination still remains an issue. Based on sitespecific conditions (i.e., site access, geology, geochemistry, hydrology, etc.), in situ chemical remediation was determined to be a feasible remedial option. Due to the lack of information regarding oxidation/reduction pathways of the contaminants, bench-scale testing was conducted to determine the efficacy of in situ chemical oxidation and/or reduction, and establish a site-specific oxidant dosage and catalyst package for potential field treatment programs.