Formation of Nitrates in Aqueous Solutions Treated with Pulsed Corona Discharge: The Impact of Organic Pollutants |
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| Authors: | Sergei Preis Iris Panorel Sergi Llauger Coll Iakov Kornev |
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| Affiliation: | 1. Department of Chemical Technology , Lappeenranta University of Technology , 53850 , Lappeenranta , Finland;2. Institute of High Technology Physics, Tomsk Polytechnic University , 634050 , Tomsk , Russia |
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| Abstract: | Pulsed corona discharge (PCD) in oxygen-nitrogen mixtures results in formation of nitrogen oxides, transformed to aqueous nitrates in contact with water. The experimental research into the impact of formate and oxalate to nitrate formation in aqueous solutions treated with PCD was undertaken. The impact of paracetamol, ibuprofen, indomethacin and their oxidation products to nitrate formation was also analyzed. Pharmaceuticals obstructed nitrate formation, while carboxylic anions and pharmaceuticals’ oxidation products noticeably improved nitrate formation in treated solutions as compared to water. The nitrate formation enhancement is explained by the aqueous ozone decomposition and hydroxyl radical formation known to be improved by carboxylic anions. |
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| Keywords: | Ozone Advanced Oxidation Processes (AOP) Anti-Inflammatory Drugs Hydroxyl Radical Pharmaceuticals Water |
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