Abteilung Wasserressourcen und Trinkwasser

Trinkwasserchemie

Willkommen in der Gruppe "Trinkwasserchemie"

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Forschungsaktivitäten

Die Forschung der letzten Jahre umfasste Oxidations- und Desinfektionsprozesse, und photochemische Transformationen.

Forschungsaktivitäten: Oxidations- und Desinfektionsprozesse

Kinetische Untersuchungen, Entwicklung von Konzepten zur Charakterisierung von Oxidations- und Desinfektionsprozessen, Charakterisierung von Matrixkomponenten, Übertragung von molekularen Erkenntnissen auf Grossanlagen:

Verständnis von reaktiven Bromspezies während der Ozonierung

  • Verständnis über die Auswirkung von Br•/BrO• auf die Bildung von Bromat
  • Ermittlung der Reaktionskinetik von Br•/BrO• mit funktionellen Gruppen in DOM
  • Bildung von bromhaltigen Oxidationsnebenprodukten

Verständnis über die Bildung von Oxidationsnebenprodukten und reaktiven Sauerstoffspezies aus organischem Material

  • Charakterisierung von gelösten organischem Material (DOM) relevant für die Aktivität mit Oxidationsmitteln wie Ozon
  • Ermittlung der relevanten funktionellen Gruppen in DOM, verantwortlich für die Bildung von Oxidationsnebenprodukten und reaktiven Sauerstoffspezies
  • Ermittlung unbekannter Oxidationsnebenprodukte

Projektkollaborationen

Ozonation is one of the treatments used in wastewater treatment plants (WWTPs) to remove MPs, reducing their discharge to the aquatic environment...
Characterization of wastewater treatment with suspect und non-target screening for the evaluation of ozonation and activated carbon treatment
Bildung und Schicksal von Transformationsprodukten bei der Wasserbehandlung mit Ozon und biologischer Nachbehandlung

Aktuelle Publikationen

Gulde, R.; Rutsch, M.; Clerc, B.; Schollée, J. E.; von Gunten, U.; McArdell, C. S. (2021) Formation of transformation products during ozonation of secondary wastewater effluent and their fate in post-treatment: from laboratory- to full-scale, Water Research, 200, 117200 (16 pp.), doi:10.1016/j.watres.2021.117200, Institutional Repository
Wünsch, R.; Mayer, C.; Plattner, J.; Eugster, F.; Wülser, R.; Gebhardt, J.; Hübner, U.; Canonica, S.; Wintgens, T.; von Gunten, U. (2021) Micropollutants as internal probe compounds to assess UV fluence and hydroxyl radical exposure in UV/H2O2 treatment, Water Research, 195, 116940 (13 pp.), doi:10.1016/j.watres.2021.116940, Institutional Repository
Rougé, V.; von Gunten, U.; Allard, S. (2020) Efficiency of pre-oxidation of natural organic matter for the mitigation of disinfection byproducts: electron donating capacity and UV absorbance as surrogate parameters, Water Research, 187, 116418 (10 pp.), doi:10.1016/j.watres.2020.116418, Institutional Repository
Li, J.; Jiang, J.; Manasfi, T.; von Gunten, U. (2020) Chlorination and bromination of olefins: kinetic and mechanistic aspects, Water Research, 187, 116424 (12 pp.), doi:10.1016/j.watres.2020.116424, Institutional Repository
Walpen, N.; Houska, J.; Salhi, E.; Sander, M.; von Gunten, U. (2020) Quantification of the electron donating capacity and UV absorbance of dissolved organic matter during ozonation of secondary wastewater effluent by an assay and an automated analyzer, Water Research, 185, 116235 (12 pp.), doi:10.1016/j.watres.2020.116235, Institutional Repository
Remucal, C. K.; Salhi, E.; Walpen, N.; von Gunten, U. (2020) Molecular-level transformation of dissolved organic matter during oxidation by ozone and hydroxyl radical, Environmental Science and Technology, 54(16), 10351-10360, doi:10.1021/acs.est.0c03052, Institutional Repository
Lim, S.; McArdell, C. S.; von Gunten, U. (2019) Reactions of aliphatic amines with ozone: kinetics and mechanisms, Water Research, 157, 514-528, doi:10.1016/j.watres.2019.03.089, Institutional Repository
Tentscher, P. R.; Lee, M.; von Gunten, U. (2019) Micropollutant oxidation studied by quantum chemical computations: methodology and applications to thermodynamics, kinetics, and reaction mechanisms, Accounts of Chemical Research, 52(3), 605-614, doi:10.1021/acs.accounts.8b00610, Institutional Repository
Marron, E. L.; Mitch, W. A.; Gunten, U. von; Sedlak, D. L. (2019) A tale of two treatments: the multiple barrier approach to removing chemical contaminants during potable water reuse, Accounts of Chemical Research, 52(3), 615-622, doi:10.1021/acs.accounts.8b00612, Institutional Repository
Krasner, S. W.; Lee, C. F. T.; Mitch, W. A.; von Gunten, U. (2018) Impact of combined chlorination and chloramination conditions on N-Nitrosodimethylamine formation, Journal American Water Works Association, 110(12), 11-24, doi:10.1002/awwa.1128, Institutional Repository
Önnby, L.; Salhi, E.; McKay, G.; Rosario-Ortiz, F. L.; von Gunten, U. (2018) Ozone and chlorine reactions with dissolved organic matter - Assessment of oxidant-reactive moieties by optical measurements and the electron donating capacities, Water Research, 144, 64-75, doi:10.1016/j.watres.2018.06.059, Institutional Repository
Önnby, L.; Walpen, N.; Salhi, E.; Sander, M.; von Gunten, U. (2018) Two analytical approaches quantifying the electron donating capacities of dissolved organic matter to monitor its oxidation during chlorination and ozonation, Water Research, 144, 677-689, doi:10.1016/j.watres.2018.06.060, Institutional Repository
Rougé, V.; Allard, S.; Croué, J.-P.; von Gunten, U. (2018) In situ formation of free chlorine during ClO2 treatment: implications on the formation of disinfection byproducts, Environmental Science and Technology, 52(22), 13421-13429, doi:10.1021/acs.est.8b04415, Institutional Repository
Liu, Z.-Q.; Shah, A. D.; Salhi, E.; Bolotin, J.; von Gunten, U. (2018) Formation of brominated trihalomethanes during chlorination or ozonation of natural organic matter extracts and model compounds in saline water, Water Research, 143, 492-502, doi:10.1016/j.watres.2018.06.042, Institutional Repository
Schollée, J. E.; Bourgin, M.; von Gunten, U.; McArdell, C. S.; Hollender, J. (2018) Non-target screening to trace ozonation transformation products in a wastewater treatment train including different post-treatments, Water Research, 142, 267-278, doi:10.1016/j.watres.2018.05.045, Institutional Repository
Knies, J.; Brookes, S.; Schubert, C. J. (2007) Re-assessing the nitrogen signal in continental margin sediments: new insights from the high northern latitudes, Earth and Planetary Sciences Letters, 253(3-4), 471-484, doi:10.1016/j.epsl.2006.11.008, Institutional Repository
Piazzoli, A.; Breider, F.; Gachet Aquillon, C.; Antonelli, M.; von Gunten, U. (2018) Specific and total N-nitrosamines formation potentials of nitrogenous micropollutants during chloramination, Water Research, 135, 311-321, doi:10.1016/j.watres.2018.02.019, Institutional Repository
von Gunten, U. (2018) Oxidation processes in water treatment: are we on track?, Environmental Science and Technology, 52(9), 5062-5075, doi:10.1021/acs.est.8b00586, Institutional Repository
Tentscher, P. R.; Bourgin, M.; von Gunten, U. (2018) Ozonation of Para-substituted phenolic compounds yields p‑benzoquinones, other cyclic α,β-unsaturated ketones, and substituted catechols, Environmental Science and Technology, 52(8), 4763-4773, doi:10.1021/acs.est.8b00011, Institutional Repository
Bourgin, M.; Beck, B.; Boehler, M.; Borowska, E.; Fleiner, J.; Salhi, E.; Teichler, R.; von Gunten, U.; Siegrist, H.; McArdell, C. S. (2018) Evaluation of a full-scale wastewater treatment plant upgraded with ozonation and biological post-treatments: abatement of micropollutants, formation of transformation products and oxidation by-products, Water Research, 129, 486-498, doi:10.1016/j.watres.2017.10.036, Institutional Repository
Krasner, S. W.; Westerhoff, P.; Mitch, W. A.; Hanigan, D.; McCurry, D. L.; von Gunten, U. (2018) Behavior of NDMA precursors at 21 full-scale water treatment facilities, Environmental Science: Water Research and Technology, 4(12), 1966-1978, doi:10.1039/C8EW00442K, Institutional Repository
Breider, F.; Salihu, I.; von Gunten, U. (2018) Formation of N-nitrosamines by micelle-catalysed nitrosation of aliphatic secondary amines, Environmental Science: Processes and Impacts, 20(10), 1479-1487, doi:10.1039/C8EM00335A, Institutional Repository
Spahr, S.; von Gunten, U.; Hofstetter, T. B. (2017) Carbon, hydrogen, and nitrogen isotope fractionation trends in N-nitrosodimethylamine reflect the formation pathway during chloramination of tertiary amines, Environmental Science and Technology, 51(22), 13170-13179, doi:10.1021/acs.est.7b03919, Institutional Repository
Song, Y.; Breider, F.; Ma, J.; von Gunten, U. (2017) Nitrate formation during ozonation as a surrogate parameter for abatement of micropollutants and the N-nitrosodimethylamine (NDMA) formation potential, Water Research, 122, 246-257, doi:10.1016/j.watres.2017.05.074, Institutional Repository
Bourgin, M.; Borowska, E.; Helbing, J.; Hollender, J.; Kaiser, H.-P.; Kienle, C.; McArdell, C. S.; Simon, E.; von Gunten, U. (2017) Effect of operational and water quality parameters on conventional ozonation and the advanced oxidation process O3/H2O2: kinetics of micropollutant abatement, transformation product and bromate formation in a surface water, Water Research, 122, 234-245, doi:10.1016/j.watres.2017.05.018, Institutional Repository
Zhao, X.; Ma, J.; von Gunten, U. (2017) Reactions of hypoiodous acid with model compounds and the formation of iodoform in absence/presence of permanganate, Water Research, 119, 126-135, doi:10.1016/j.watres.2017.04.033, Institutional Repository
Soltermann, F.; Abegglen, C.; Tschui, M.; Stahel, S.; von Gunten, U. (2017) Options and limitations for bromate control during ozonation of wastewater, Water Research, 116, 76-85, doi:10.1016/j.watres.2017.02.026, Institutional Repository
Merle, T.; Pronk, W.; von Gunten, U. (2017) MEMBRO3X, a novel combination of a membrane contactor with advanced oxidation (O3/H2O2) for simultaneous micropollutant abatement and bromate minimization, Environmental Science and Technology Letters, 4(5), 180-185, doi:10.1021/acs.estlett.7b00061, Institutional Repository
Heeb, M. B.; Kristiana, I.; Trogolo, D.; Arey, J. S.; von Gunten, U. (2017) Formation and reactivity of inorganic and organic chloramines and bromamines during oxidative water treatment, Water Research, 110, 91-101, doi:10.1016/j.watres.2016.11.065, Institutional Repository
Breider, F.; von Gunten, U. (2017) Quantification of total N-nitrosamine concentrations in aqueous samples via UV-photolysis and chemiluminescence detection of nitric oxide, Analytical Chemistry, 89(3), 1574-1582, doi:10.1021/acs.analchem.6b03595, Institutional Repository
Lee, M.; Blum, L. C.; Schmid, E.; Fenner, K.; von Gunten, U. (2017) A computer-based prediction platform for the reaction of ozone with organic compounds in aqueous solution: kinetics and mechanisms, Environmental Science: Processes and Impacts, 19(3), 465-476, doi:10.1039/C6EM00584E, Institutional Repository
de Vera, G. A.; Gernjak, W.; Weinberg, H.; Farré, M. J.; Keller, J.; von Gunten, U. (2017) Kinetics and mechanisms of nitrate and ammonium formation during ozonation of dissolved organic nitrogen, Water Research, 108, 451-461, doi:10.1016/j.watres.2016.10.021, Institutional Repository
Spahr, S.; Cirpka, O. A.; von Gunten, U.; Hofstetter, T. B. (2017) Formation of N-Nitrosodimethylamine during chloramination of secondary and tertiary amines: role of molecular oxygen and radical intermediates, Environmental Science and Technology, 51(1), 280-290, doi:10.1021/acs.est.6b04780, Institutional Repository
Soltermann, F.; Abegglen, C.; Götz, C.; von Gunten, U. (2016) Bromide sources and loads in Swiss surface waters and their relevance for bromate formation during wastewater ozonation, Environmental Science and Technology, 50(18), 9825-9834, doi:10.1021/acs.est.6b01142, Institutional Repository

Forschungsaktivitäten: Photochemische Transformationprozesse

Quantenausbeuten, Kinetik und Mechanismen photochemischer Reaktionen, die zum Abbau von Mikroverunreinigungen führen.

Photochemische Transformationsprozesse im Zusammenhang mit Schadstoffen und Radikalspezies

  • Photosensibilisierter Abbau von Phenol- und Anilin-Derivaten, Arzneimitteln und Pestiziden: die komplexe Rolle des gelösten organischen Materials bei der Begünstigung und Hemmung von Oxidationsreaktionen
  • Photochemisch-induzierte Bildung und Kinetik von oxidierenden Radikalen (Sulfat-Radikal, Carbonat-Radikal): Anwendung auf den Abbau von Mikroverunreinigungen in technischen aquatischen Systemen

Charakterisierung von organischen Radikalspezies produziert aus der Photobestrahlung von Organischem Material ("OROPHOT")

  • Photochemischer Abbau von organischen Schadstoffen
  • Photochemisch induzierte Bildung von Oxidantien aus chromophorischem organischem Material
  • Methoden: Photochemische Bestrahlungsexperimente, HPLC Analyse, Blitzlichtphotolyse

Aktuelle Publikationen

Remke, S. C.; von Gunten, U.; Canonica, S. (2021) Enhanced transformation of aquatic organic compounds by long-lived photooxidants (LLPO) produced from dissolved organic matter, Water Research, 190, 116707 (10 pp.), doi:10.1016/j.watres.2020.116707, Institutional Repository
Canonica, S.; Schönenberger, U. (2019) Inhibitory effect of dissolved organic matter on the transformation of selected anilines and sulfonamide antibiotics induced by the sulfate radical, Environmental Science and Technology, 53(20), 11783-11791, doi:10.1021/acs.est.9b04105, Institutional Repository
Leresche, F.; Ludvíková, L.; Heger, D.; Klán, P.; von Gunten, U.; Canonica, S. (2019) Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN), Photochemical and Photobiological Sciences, 18(2), 534-545, doi:10.1039/C8PP00519B, Institutional Repository
Vione, D.; Fabbri, D.; Minella, M.; Canonica, S. (2018) Effects of the antioxidant moieties of dissolved organic matter on triplet-sensitized phototransformation processes: implications for the photochemical modeling of sulfadiazine, Water Research, 128, 38-48, doi:10.1016/j.watres.2017.10.020, Institutional Repository
Lee, M.; Merle, T.; Rentsch, D.; Canonica, S.; von Gunten, U. (2017) Abatement of polychoro-1,3-butadienes in aqueous solution by ozone, UV photolysis, and advanced oxidation processes (O3/H2O2 and UV/H2O2), Environmental Science and Technology, 51(1), 497-505, doi:10.1021/acs.est.6b04506, Institutional Repository
Rosario-Ortiz, F. L.; Canonica, S. (2016) Probe compounds to assess the photochemical activity of dissolved organic matter, Environmental Science and Technology, 50(23), 12532-12547, doi:10.1021/acs.est.6b02776, Institutional Repository
Yuan, C.; Chakraborty, M.; Canonica, S.; Weavers, L. K.; Hadad, C. M.; Chin, Y.-P. (2016) Isoproturon reappearance after photosensitized degradation in the presence of triplet ketones or fulvic acids, Environmental Science and Technology, 50(22), 12250-12257, doi:10.1021/acs.est.6b03655, Institutional Repository
McNeill, K.; Canonica, S. (2016) Triplet state dissolved organic matter in aquatic photochemistry: reaction mechanisms, substrate scope, and photophysical properties, Environmental Science: Processes and Impacts, 18(11), 1381-1399, doi:10.1039/c6em00408c, Institutional Repository
Leresche, F.; Von Gunten, U.; Canonica, S. (2016) Probing the photosensitizing and inhibitory effects of dissolved organic matter by using N,N-dimethyl-4-cyanoaniline (DMABN), Environmental Science and Technology, 50(20), 10997-11007, doi:10.1021/acs.est.6b02868, Institutional Repository