Person: Obermaier, Nathan
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Veröffentlichung Microplastics in the Danube River Basin: a first comprehensive screening with harmonized analytical approach(2022) Braun, Ulrike; Bannick, Claus Gerhard; Bednarz, Marius; Kerndorf, Alexander; Lukas, Marcus; Obermaier, Nathan; Ricking, MathiasIn this study, carried out within the Joint Danube Survey 4, a comprehensive microplastic screening in the water column within a large European river basin from its source to estuary, including major tributaries, was realized. The objective was to develop principles of a systematic and practicable microplastic monitoring strategy using sedimentation boxes for collection of suspended particulate matter followed by its subsequent analysis using thermal extraction desorption-gas chromatography/mass spectrometry. In total, 18 sampling sites in the Danube River Basin were investigated. The obtained suspended particulate matter samples were subdivided into the fractions of >100 mikrom and <100 mikrom and subsequently analyzed for microplastic mass contents. The results showed that microplastics were detected in all samples, with polyethylene being the predominant polymer with maximum contents of 22.24 mikrog/mg, 3.23 mikrog/mg for polystyrene, 1.03 mikrog/mg for styrene-butadiene-rubber, and 0.45 mikrog/mg for polypropylene. Further, polymers such as different sorts of polyester, polyacrylates, polylactide, and natural rubber were not detected or below the detection limit. Additional investigations on possible interference of polyethylene signals by algae-derived fatty acids were assessed. In the context of targeted monitoring, repeated measurements provide more certainty in the interpretation of the results for the individual sites. Nevertheless, it can be stated that the chosen approach using an integrative sampling and determination of total plastic content proved to be successful. © 2022 The AuthorsVeröffentlichung A simple model approach for the desorption of DDT and related compounds from contaminated sediment to plastic polymers(2021) Bannick, Claus Gerhard; Kerndorff, Alexander; Braun, Ulrike; Obermaier, Nathan; Ricking, MathiasVeröffentlichung Mikroplastik-Analytik - Probenahme, Probenaufbereitung und Detektionsverfahren(Deutschland. Bundesministerium für Bildung und Forschung, 2020) Braun, Ulrike; Altmann, Korinna; Bannik, Claus G.; Obermaier, Nathan; Ricking, Mathias; Stein, Ulf; Schritt, HannesDas Statuspapier fasst die Inhalte der Verbundprojekt-übergreifenden Diskussionen und Abstimmungen innerhalb des Querschnittsthemas (QST) "Analytik und Referenzmaterialien" des Forschungsschwerpunkts Plastik in der Umwelt zusammen. Die vorliegenden Verfahrensempfehlungen beruhen auf dem aktuellen Wissensstand zur Analytik von MP und richtet sich an Akteur*innen in der Wissenschaft als auch Anwender*innen in der Praxis. Die vorliegende Fassung wurde aus dem Diskussionspapier (Link Dokument Stand Oktober 2018) entwickelt. Dieser kontinuierliche Entwicklungs- oder Erarbeitungsprozess wurde durch eine Reihe von Veranstaltungen zwischen 2018 und 2020 innerhalb des Forschungsschwerpunktes organisatorisch untermauert. Motivation dieses Statuspapiers ist es, die im Forschungsschwerpunkt "Plastik in der Umwelt" verwendeten physikochemischen Untersuchungsverfahren zur Analytik von Mikroplastik zusammenzuführen. Dadurch sollen möglichst validierte Methoden und vergleichbare Ergebnisse in den verschiedenen Projekten für die jeweils spezifische Fragestellung erreicht werden - insbesondere für zukünftige Projekte. Am Ende soll ein möglichst einheitlicher Methodenpool für die relevanten Fragestellungen in Wissenschaft, Wirtschaft und Verwaltung zur Verfügung stehen. © bmf-plastik.deVeröffentlichung Analysis of microplastics - sampling, preparation and detection(Deutschland. Bundesministerium für Bildung und Forschung, 2021) Braun, Ulrike; Altmann, Korinna; Bannik, Claus G.; Obermaier, Nathan; Ricking, Mathias; Stein, Ulf; Schritt, HannesThis status report was prepared within the framework of the cross-cutting topic 1 "Analytics and reference materials" of the research focus. It summarizes the contents of the project discussions and coordination within the cross-cutting issue. The organization of this ongoing process of development or elaboration has been supported by several events. The status report presents a summary of the physicochemical methods for the analysis of MP used in the research focus "Plastics in the Environment". The present recommendations are based on the current state of knowledge of the analysis of MP and are directed at actors in science as well as potential users in practice © bmf-plastik.deVeröffentlichung Development of a routine screening method for the microplastic mass content in a wastewater treatment plant effluent(2022) Goedecke, Caroline; Eisentraut, Paul; Bannick, Claus Gerhard; Altmann, Korinna; Barthel, Anne-Kathrin; Obermaier, Nathan; Braun, Ulrike; Ricking, MathiasAn investigation of microplastic (MP) occurrence in a municipal wastewater treatment plant (WWTP) effluent with tertiary treatment was carried out. Representative sample volumes of 1 m3 were taken by applying a fractionated filtration method (500, 100, and 50 (micro)m mesh sizes). The detection of MP mass fractions by thermal extraction desorption-gas chromatography/mass spectrometry (TED-GC/MS) was achieved without the previously required additional sample pretreatment for the first time. Different types of quantification methods for the evaluation of TED-GC/MS data were tested, and their accuracy and feasibility have been proven for real samples. Polyethylene, polystyrene, and polypropylene were identified in effluent samples. The polymer mass content varied significantly between 5 and 50 mg m-3. A correlation between the MP load and the quantity of suspended matter in the WWTP effluents, particle size distribution, particle type, and operation day (i.e., weekday, season, and capacity) was not found. It can be concluded that a meaningful assessment of WWTPs requires a comprehensive sampling campaign with varying operation conditions. © 2022 The AuthorsVeröffentlichung Konzeptvorschlag für die Auswahl zu untersuchender Mikroverunreinigungen in kommunalen Abwässern mittels physiko-chemischer Untersuchungsverfahren(2022) Braun, Ulrike; Bannick, Claus Gerhard; Lukas, Marcus; Bachem, Gunnar; Obermaier, Nathan; Ricking, MathiasVeröffentlichung Moving forward: the European Commission's proposal for a Recast Urban Wastewater Treatment Directive(Umweltbundesamt, 2023) Bannick, Claus Gerhard; Flügel, Ines; Braun, Ulrike; Eisenträger, Adolf; Obermaier, Nathan; Osiek, Dirk; Rechenberg, Jörg; Deutschland. UmweltbundesamtThis scientific opinion paper discusses the key topics of the European Commission's Proposal for a Recast Urban Wastewater Treatment Directive. It shows how the proposed changes could affect wastewater treatment in Germany and highlights further refinement needs. In general, the proposal of the revised UWWTD is endorsed. The clear shift from basic wastewater collection and treatment to efficient wastewater management will have a positive influence on various environmental targets. It will also reduce the impact of wastewater treatment on the receiving water bodies as well as the impact of climate change on both, our cities, and the environment. Quelle: www.umweltbundesamt.de