Person: Jentzsch, Franziska
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Veröffentlichung Scientific guidance on soil phototransformation products in groundwater - consideration, parameterisation and simulation in the exposure assessment of plant protection products(2022) Schneider, Franziska; Janzen, Wolfgang; Jentzsch, Franziska; Egsmose, Mark; Pickl, Christina; Fait, Gabriella; Priegnitz, JanThis Guidance Document gives recommendations how to consider transformation products from soilphotolysis (â€Ìphototransformation productsâ€Ì) when modelling the predicted environmental concentrationsin groundwater. It describes possible parameterisations of the photolytic pathway (i.e. the photolytic half-life and the corresponding reference irradiation) in a tiered approach using the FOCUS-PELMO model.Following the recommendations of the EFSA guidance (2014), separate half-lives can be derived for thesurface processes (kfast) and the biodegradation in the soil matrix (kslow) fromfield dissipation studies byusing biphasic models. Fromfield dissipation studies evaluated with biphasic kinetics, the kfastvalue canbe considered representative for the photolytic degradation on soil surface for non-volatile substances.This value should be determined after a time-step normalisation according to irradiance data for thelocation and period of thefield trial, to a reference irradiance of 100 W mâ Ì2. In case irradiance values arenot available in the study, these values can be derived from databases such as AGRI4CAST or NASA,freely available in the Internet. Quelle: ArtikelVeröffentlichung Chemikalieneintrag in Gewässer vermindern -Trifluoracetat (TFA) als persistente und mobile Substanz mit vielen Quellen(Umweltbundesamt, 2021) Adlunger, Kirsten; Anke, Julia Margaretha; Bachem, Gunnar; Banning, Helena; Biegel-Engler, Annegret; Blondzik, Katrin; Braun, Ulrike; Eckhardt, Alexander; Gildemeister, Daniela; Hilliges, Falk; Hoffmann, Gabriele; Schneider, Franziska; Jentzsch, Franziska; Klitzke, Sondra; Kuckelkorn, Jochen; Martens, Kerstin; Müller, Alexandra; Pickl, Christina; Rechenberg, Jörg; Sättler, Daniel; Schmidt, Uwe; Speichert, Gunther; Warnke, Ingo; Wehner, Jeannine; Wischer, Ronny; Deutschland. UmweltbundesamtTrifluoracetat (TFA) ist ein mobiler und persistenter Stoff, der primär durch den Abbau verschiedener Fluorchemikalien in den Wasserkreislauf eingetragen wird und dort auf unabsehbare Zeit verbleibt. Bereits jetzt besteht eine hohe Grundbelastung vieler Gewässer mit TFA mit einigen regionalen Hotspots. Dieses Hintergrundpapier präsentiert aktuelle Daten und Abschätzungen zu Quellen, Eintragspfaden, Belastungen, Auswirkungen und Maßnahmen zu TFA. Es gibt einen Ausblick auf erste Aktivitäten und Optionen zur umfassenden Minimierung von TFA-Einträgen in die Umwelt. Trotz Wissenslücken wird deutlich, dass kurzfristig eine konsistente Regulation und eine übergreifende Minimierungsstrategie auf den Weg gebracht werden müssen. Quelle: www.umweltbundesamt.deVeröffentlichung Photolysis of mixtures of UV filters octocrylene and ethylhexyl methoxycinnamate leads to formation of mixed transformation products and different kinetics(2019) Schneider, Franziska; Jentzsch, Franziska; Reich, M.; Kümmerer, K.The treatment with ultraviolet (UV) light is a well-known technique for water disinfection. Photodegradation by UV light is in discussion as measure for advanced water treatment that could provide a potential removal option for micropollutants. Micropollutants such as ingredients from personal care products are also present in grey water. Grey water gets increasingly attention as a source for water reuse. For that purpose it has to be treated. UV-treatment is an option. However, the knowledge on the fate of micropollutants within such a treatment is little. Therefore, we investigated the fate of the UV filters ethylhexyl methoxycinnamate (EHMC), and octocrylene (OCR) as for both UV filters the presence in grey water was reported. OCR as a single compound was investigated with regard to its degradation kinetics and possible photo-transformation products (photo-TPs). These results were compared with those of EHMC previously reported in literature. The mixture of the two UV filters was also investigated to reveal if mixture effects occur regarding the elimination of the UV filters and the formation of TPs. A medium pressure mercury vapor lamp (200-400 nm) was employed for photolysis. This study shows that OCR itself was eliminated below the limit of detection after 256 min and that photo-TPs were formed. The photolysis of the mixture demonstrated alterations of the degradation rates and patterns. Additional TPs were formed by the reaction of the UV filters or TPs with each other. The study shows that more attention should be paid to mixture-effects and mixture-TPs that may cause further follow-up effects. © 2019 Elsevier B.V. All rights reserved.Veröffentlichung Reducing the input of chemicals into waters: trifluoroacetate (TFA) as a persistent and mobile substance with many sources(Umweltbundesamt, 2022) Adlunger, Kirsten; Anke, Julia Margaretha; Bachem, Gunnar; Banning, Helena; Biegel-Engler, Annegret; Blondzik, Katrin; Braun, Ulrike; Eckhardt, Alexander; Gildemeister, Daniela; Hilliges, Falk; Hoffmann, Gabriele; Schneider, Franziska; Jentzsch, Franziska; Klitzke, Sondra; Kuckelkorn, Jochen; Martens, Kerstin; Müller, Alexandra; Pickl, Christina; Rechenberg, Jörg; Sättler, Daniel; Schmidt, Uwe; Speichert, Gunther; Warnke, Ingo; Wehner, Jeannine; Wischer, Ronny; Deutschland. UmweltbundesamtTrifluoroacetate (TFA) is a mobile and persistent substance that is primarily introduced into the water cycle through the degradation of various fluorochemicals and remains in the environment in the long term. TFA can be detected in many water bodies in relatively high concentrations with some regional hotspots. This background paper presents current data and estimates on sources, input pathways, contamination, impact and measures on TFA. It gives an outlook on first activities and options to comprehensively minimise TFA inputs to the environment. Despite gaps in knowledge, it becomes clear that consistent regulation and an overarching minimisation strategy must be initiated in the short term. Quelle: www.umweltbundesamt.de