Abstract
Improved environmental performance continues to grow in importance to industry. We have been examining thermal and photochemical oxidation processes for the treatment of dilute aqueous organic wastes that are either generated in the course of chemical manufacturing or exist in contaminated groundwaters. Most of our work has focused on advanced oxidation processes1 which employ oxidants and catalysts and depend to some degree on the in-situ generation of hydroxyl radicals (OH). Our program has involved: a) laboratory and treatability studies on model and actual wastewaters that compare chemical oxidation technologies, explore oxidation mechanisms, and utilize experimental designs aimed at delineating important parameters; b) pilot-scale field demonstrations on industrial streams and c) economic and engineering evaluations including comparisons with base technologies such as carbon adsorption and air or stream stripping/abatement. We have examined Fenton oxidation (Fe/H2O2), UV photochemical oxidation (UV/H2O2, UV/Fe/H2O2 and UV/ozone) and semiconductor (TiO2) photocatalytic oxidation. Herein, we report on our investigations of the photochemically driven oxidation of a number of model aromatic wastes using iron catalysts, hydrogen peroxide, and oxygen. The goal of this work is to compare relative efficiencies of destruction, delineate the important factors that control destruction efficiencies and elucidate reaction mechanisms. We have chosen to focus on aromatic compounds because they react rapidly with hydroxyl radicals2 and also have uv absorptions which allow one to follow the course of their disappearance.
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Tolman, C.A., Tumas, W., Lee, S.Y.L., Campos, D. (1993). The Destruction of Toxic Aqueous Organic Compounds by H2O2/Fe++/UV/O2 . In: Barton, D.H.R., Martell, A.E., Sawyer, D.T. (eds) The Activation of Dioxygen and Homogeneous Catalytic Oxidation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3000-8_5
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DOI: https://doi.org/10.1007/978-1-4615-3000-8_5
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