Aqueous phase heterogeneous catalytic oxidation of dissolved organic compounds has been demonstrated as a potential means for the remediation of contaminated ground waters, industrial effluents, and other wastewater streams under comparatively mild conditions of temperature and pressure. Dissolved molecular oxygen is used as oxidant over a platinum-ruthenium catalyst on a high surface area carbon support at temperatures to 130 degrees C and pressures to 6 atm. Studies were conducted using packed catalyst beds in tubular continuous plug flow microreactors. Reaction rate constants for the oxidation of trichloroethylene were determined using a pseudo first-order plug flow kinetic model over the temperature range between 90-120 degrees C. Reactor operating conditions required for deep oxidation of aqueous trichloroethylene at 90 degrees C are reported.