Chemistry for Sustainable Development 15 (2007) 705-710 Nitrophenol Oxidation in Water with the Use of Hydrodynamic Cavitation

Abstract The role of the hydrodynamic cavitation for initiating and supporting chain-radical reactions of oxidation of organic substrates, among them 4-nitrophenol (4-NP), with Fenton's reagent (H 2 O 2 + Fe 2+ ) has been shown. Fe 2+ ions were supplied into solution by dissolving split steel shot or steel chips in cavitation reaction vessel. At initial concentrations of 4-NP and H 2 O 2 of 6.7 × 10 -5 and 4.02 × 10 -4 mol/L, respectively, the degree of phenol conversion at pH 3.4 reaches 98 %. The diagram of the set-up designed to treat sewage with productivity 0.5 m 3 /h and the description of the equipment for cavitation generation are presented