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Chemistry for Sustainable Development

2007 year, number 6

Nitrophenol Oxidation in Water with the Use of Hydrodynamic Cavitation

N. B. Vasilieva1, A. A. Ryazantsev2, A. A. Batoeva3
1 Siberian Transport University
2 Siberian Transport University, raastu@academ.org
3 Baikal Institute of Nature Management

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 (H2O2 + Fe2+) has been shown. Fe2+ ions were supplied into solution by dissolving split steel shot or steel chips in cavitation reaction vessel. At initial concentrations of 4-NP and H2O2 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 m3/h and the description of the equipment for cavitation generation are presented.