Methods and apparatus are described which utilize an aqueous hydrogen
peroxide composition of hydrogen peroxide and at least one additive which
serves to catalyze the rapid decomposition of the hydrogen peroxide into
hydroxyl radicals. When contacted with an atmospheric effluent containing
odor and/or noxious components, the hydroxyl radicals formed oxidize the
odor and noxious components to non-odor offensive, environmentally
acceptable by-product.