Degradation of Aqueous Nitrophenols by Ozone Combined with UV-Radiation and Hydrogen Peroxide

Marina Trapido Dept. of Environmental Chemistry and Technology, Institute of Chemistry at Tallinn Technical University, Akadeemia tee 15, Tallinn, 12618, Estonia

Yelena Veressinina Dept. of Environmental Chemistry and Technology, Institute of Chemistry at Tallinn Technical University, Akadeemia tee 15, Tallinn, 12618, Estonia

Juha Kallas Dept. of Chemical Technology, Lappeenranta University of Technology, POB 20, Lappeenranta, FIN-53851, Finland

Abstract

The degradation of nitrophenols with ozone and ozone combined with hydrogen peroxide and/or UV-radiation was studied. These combinations accelerated the degradation of nitrophenols and decreased the ozone specific consumption mostly at low pH values. O₃/UV/H₂O₂ combination was the most effective for the degradation of nitrophenols. According to the Daphnia magna acute toxicity test, the treatment led to complete detoxification of nitrophenols. A high degree of nitrogen mineralization was achieved.

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Degradation of Aqueous Nitrophenols by Ozone Combined with UV-Radiation and Hydrogen Peroxide

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Degradation of Aqueous Nitrophenols by Ozone Combined with UV-Radiation and Hydrogen Peroxide

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