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Wet air oxidation rates of p-nitrophenol in the presence of excess oxygen, at different temperatures and oxygen pressures conditions were investigated. The experiments were carried out at between 120 and 200°C and at 1.0-3.0 MPa partial pressures of oxygen, in a glass vessel inserted in a stainless steel reactor. Initial p-nitrophenol concentration was 3.59×10−4 mol/L. Copper sulfate (CuSO4.5H2O) was used as a catalyst. Presence of Cu2+ ions in the reaction medium accelerated oxidation reaction slightly. Oxidation kinetics have also been investigated with respect to p-nitrophenol disappearance and TOC results.

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