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Transformation products and reaction kinetics of fragrances in advanced wastewater treatment with ozone |
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| Authors: | Janzen Niklas Dopp Elke Hesse Julia Richards Jessica Türk Jochen Bester Kai |
| Institution: | a Department of Municipal Water- and Waste Management, University Duisburg-Essen, Essen, Germany b Institute of Hygiene and Occupational Medicine, University of Duisburg-Essen, Germany c Institute of Energy and Environmental Technology, Duisburg, Germany d Department of Environmental Science, National Environmental Research Institute, Aarhus University, Frederkisborgsvej 399, 4000 Roskilde, Denmark e IWW Rheinisch-Westfälisches Institut für Wasserforschung gGmbH, Mülheim, Germany |
| Abstract: | The reaction of the fragrance compounds 4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopentag]isochromene (HHCB), 1-(3,5,5,6,8,8-hexamethyl-6,7-dihydronaphthalen-2-yl)ethanone (AHTN), 1-tert-butyl-3,5-dimethyl-2,4,6-trinitrobenzene (musk xylene/MX), 1-(4-tert-butyl-2,6-dimethyl-3,5-dinitrophenyl)ethanone (musk ketone/MK), and 1-(2,3,8,8-tetramethyl-1,3,4,5,6,7-hexahydronaphthalen-2-yl)ethanone (OTNE) with ozone in tap water as well as waste water treatment plant (WWTP) effluents is described. Several transformation products are characterized by means of gas chromatography coupled to mass spectrometry. One transformation product (HHCB-Lactone) was confirmed by means of a true standard. Musk xylene and musk ketone do not react with ozone under the conditions used in this study. AHTN and HHCB reacted slowly to a multitude of transformation products, while OTNE reacted quickly to several stable transformation products. The reaction constants and half lives are used to predict removal efficiencies for full scale reactors. |
| Keywords: | Ozonation By-products Rate constants Fragrances AHTN HHCB |
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