Evaluation of the mass transport rates of oxygen and sulfate from a source into a simulated groundwater environment.

摘要

Terminal electron acceptors (TEAs), such as oxygen and sulfate, are a vital part of bioremediation chemistry but a limiting factor in some cases. This thesis work was aimed at determining transport rates and mechanisms of oxygen and sulfate being introduced into a simulated groundwater environment from a single, solid chemical source. Oxygen in the form of magnesium peroxide and sulfate in the form of sodium sulfate and calcium sulfate were each added to various simulated groundwater systems. Measurements were taken throughout the systems to determine mass transport of the TEAs. Oxygen transport results were unreliable due to operational and analytical difficulties. Sulfate transport results suggest “density-driven” transport was a large factor in movement of sulfate through the simulated groundwater and that sulfate addition to a aquifer may only be valid at higher groundwater velocities.