TY - GEN A1 - Ahmed, Naveed A1 - Martienssen, Marion A1 - Bryant, Isaac Mbir A1 - Vione, Davide A1 - Bruzzoniti, Maria Concetta A1 - Riedel, Ramona T1 - Investigation on UV Degradation and Mechanism of 6:2 Fluorotelomer Sulfonamide Alkyl Betaine, Based on Model Compound Perfluorooctanoic Acid T2 - ChemEngineering N2 - The UV treatment of 6:2 FTAB involves the mitigation of this persistent chemical by the impact of ultraviolet radiation, which is known for its resistance to environmental breakdown. UV treatment of PFOA and/or 6:2 FTAB, and the role of responsible species and their mechanism have been presented. Our investigation focused on the degradation of perfluorooctanoic acid (PFOA) and 6:2 fluorotelomer sulfonamide alkyl betaine (6:2 FTAB, Capstone B), using UV photolysis under various pH conditions. Initially, we used PFOA as a reference, finding a 90% decomposition after 360 min at the original (unadjusted) pH 5.6, with a decomposition rate constant of (1.08 ± 0.30) × 10−4 sec−1 and a half-life of 107 ± 2 min. At pH 4 and 7, degradation averaged 85% and 80%, respectively, while at pH 10, it reduced to 57%. For 6:2 FTAB at its natural pH 6.5, almost complete decomposition occurred. The primary UV transformation product was identified as 6:2 fluorotelomer sulfonic acid (6:2 FTSA), occasionally accompanied by shorter-chain perfluoroalkyl acids (PFAAs) including PFHpA, PFHxA, and PFPeA. Interestingly, the overall decomposition percentages were unaffected by pH for 6:2 FTAB, though pH influenced rate constants and half-lives. In PFOA degradation, direct photolysis and reaction with hydrated electrons were presumed mechanisms, excluding the involvement of hydroxyl radicals. The role of superoxide radicals remains uncertain. For 6:2 FTAB, both direct and indirect photolysis were observed, with potential involvement of hydroxyl, superoxide radicals, and/or other reactive oxygen species (ROS). Clarification is needed regarding the role of 𝑒−𝑎𝑞 in the degradation of 6:2 FTAB. KW - PFOA KW - 6:2 FTAB KW - decomposition KW - photolysis KW - scavenger Y1 - 2024 U6 - https://doi.org/10.3390/chemengineering8020032 SN - 2305-7084 VL - 8 IS - 2 ER - TY - BOOK A1 - Hoffmann, Melanie A1 - Anders, Kenneth A1 - Fischer, Lars A1 - Böllmann, Jörg A1 - Brückner, Ardo A1 - Brunk, Ingo A1 - Donath, Helmut A1 - Donat, Ralf A1 - Elmer, Michael A1 - Güth, Mareike A1 - Häußler, Robert A1 - Mrzljak, Jadranka A1 - Mudra, Dieter A1 - Müller, Markus A1 - Peschel, Tim A1 - Pilz, Wilfried A1 - Sawade, Wolfgang A1 - Schonert, P. A1 - Siedschlag, Marina A1 - Siedschlag, Yvonne A1 - Wanner, Manfred A1 - Wöllecke, Jens ED - Hoffmann, Melanie ED - Anders, Kenneth ED - Fischer, Lars T1 - Kolonisten gesucht! Steckbriefe natürlicher und sozialer Besiedler der Bergbaufolgelandschaft Schlabendorfer Felder Y1 - 2010 PB - Büro für Landschaftskommunikation CY - Bad Freienwalde ER - TY - CHAP A1 - Elmer, Michael A1 - Wöllecke, Jens A1 - Gebhardt, Sascha A1 - Böllmann, Jörg A1 - Hohberg, Karin A1 - Wanner, Manfred A1 - Xylander, Willi E. R. A1 - Hüttl, Reinhard F. ED - Hotes, Stefan ED - Wolters, Volkmar T1 - Primärsukzession der Bodenorganismen T2 - Fokus Biodiversität : wie Biodiversität in der Kulturlandschaft erhalten und nachhaltig genutzt werden kann Y1 - 2010 SN - 978-3-86581-172-1 SP - 125 EP - 131 PB - oekom CY - München ER - TY - GEN A1 - Okofo, Louis Boansi A1 - Adonadaga, Melvin-Guy A1 - Martienssen, Marion T1 - Groundwater age dating using multi-environmental tracers (SF6, CFC-11, CFC-12, δ18O, and δD) to investigate groundwater residence times and recharge processes in Northeastern Ghana T2 - Journal of Hydrology Y1 - 2022 U6 - https://doi.org/10.1016/j.jhydrol.2022.127821 SN - 1879-2707 SN - 0022-1694 VL - Vol. 610 SP - 1 EP - 18 ER - TY - GEN A1 - Ahmed, Naveed A1 - Martienssen, Marion A1 - Bryant, Isaac Mbir A1 - Vione, Davide A1 - Bruzzoniti, Maria Concetta A1 - Riedel, Ramona T1 - Investigation on UV Degradation and Mechanism of 6:2 Fluorotelomer Sulfonamide Alkyl Betaine, Based on Model Compound Perfluorooctanoic Acid T2 - ChemEngineering Y1 - 2024 U6 - https://doi.org/10.3390/chemengineering8020032 SN - 2305-7084 VL - 8 IS - 2 ER - TY - GEN A1 - Afitiri, Abdul-Rahaman A1 - Aram, Simon Appah A1 - Martienssen, Marion T1 - Sytematic review of the effects of Advanced Oxidation Processes integration with solar water disinfection for improved drinking water production T2 - Waste Management Bulletin Y1 - 2024 U6 - https://doi.org/10.1016/j.wmb.2023.08.005 SN - 2949-7507 VL - 1 IS - 4 SP - 52 EP - 59 ER - TY - GEN A1 - Böllmann, Jörg A1 - Martienssen, Marion T1 - Seasonal Variability of Cultivable Nitrate-Reducing and Denitrifying Beacteria and Functional Gene Copy Number in Fresh Water Lake T2 - Microorganisms Y1 - 2024 U6 - https://doi.org/10.3390/microorganisms12030511 SN - 2076-2607 VL - 12 IS - 3 ER - TY - GEN A1 - Böllmann, Jörg A1 - Elmer, Michael A1 - Wöllecke, Jens A1 - Raidl, Stefan A1 - Hüttl, Reinhard F. T1 - Defensive strategies of soil fungi to prevent grazing by Folsomia candida (Collembola) T2 - Pedobiologia Y1 - 2010 SN - 1873-1511 VL - 53 IS - 2 SP - 107 EP - 114 ER - TY - CHAP A1 - Wöllecke, Jens A1 - Böllmann, Jörg A1 - Schneider, Bernd Uwe A1 - Hüttl, Reinhard F. ED - Hüttl, Reinhard F. ED - Schneider, Bernd Uwe T1 - Vergleichende Untersuchungen zur Durchwurzelbarkeit und Mykorrhizierung auf forstlich rekultivierten Kippsubstraten T2 - Neue Ansätze in der land- und forstwirtschaftlichen Rekultivierung Y1 - 2009 SN - 978-3-937728-06-3 SN - 3-937728-06-6 SP - 207 EP - 224 PB - BTU CY - Cottbus ER -