Comparison of commercial uv lamps for radical oxidation and direct photolysis in211 water

摘要

Lawrence Livermore National Laboratory (LLNL) is charged with developing methods211u001efor treating contaminated sites and destroying waste organic compounds that are 211u001ecurrently being accumulated, including Trimsol (machining oil), trichloroethene 211u001e(ICE), tributyl phosphate (TBP), kerosene, and many other organics. These 211u001eorganics are sometimes present mixed with radioactive waste, and in these cases 211u001eit is important to destroy the organics in such a way as to not increase the 211u001etotal volume of the waste and to ensure that no radioactivity is released in the 211u001eprocess. Among the most promising techniques for treating aqueous mixed wastes 211u001eare ultraviolet light (UV) oxidation and the molten salt process, as opposed to 211u001emethods like incineration or supercritical water oxidation that might lead to air 211u001eemissions of radioactivity if not very carefully controlled. The purpose of the 211u001epresent study was to compare the energy efficiency of various commercial UV lamp 211u001esystems designed for photooxidation. Two type of tests were conducted: 1) direct 211u001ephotolysis of a chlorinated compound and 2) photolysis of hydrogen peroxide, 211u001ewhich is an additive often used to photooxidize compounds that are not amenable 211u001eto direct photolysis. The results should allow LLNL to select the most cost-211u001eeffective system for treating wastes by UV-enhanced radical oxidation processes.