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Plant wax composition of sediment core ROT21 from the Rotsee, Switzerland

This dataset contains compound-specific hydrogen (δ2H) and carbon (δ13C) isotope compositions and concentrations of long-chain n-alkanes and fatty acids (n-alkanoic acids) from the ROT21 sediment record of Rotsee, Central Switzerland (47°04′10″N, 8°18′48″E, 419 m a.s.l.). Sediment cores were retrieved in October 2021 using a UWITEC gravity corer, and the dataset spans the past ~13,000 years based on 19 radiocarbon dates (terrestrial and aquatic macrofossils) integrated with 210Pb and 137Cs profiles (see De Jonge et al., 2025). Laboratory analyses were conducted between February 2023 and November 2024 at the University of Basel. Sediment samples (~2–5 g) were sub-sampled, freeze-dried, spiked with internal standards (n-C19-alkanoic acid, n-C36-alkane, 2-octadecanone, and n-C21-alkanol), and extracted with dichloromethane/methanol (9:1, v/v) using an Accelerated Solvent Extractor (Dionex ASE 350, Thermo Fisher Scientific). Following saponification, neutral fractions were separated via silica gel chromatography, and fatty acids were converted to fatty acid methyl esters (FAMEs). Both n-alkanes and FAMEs were further purified to isolate saturated compounds using AgNO3-impregnated silica gel columns, then analyzed and quantified by gas chromatography with flame ionization detection (GC-FID). Peak areas were normalized to recovery standards to account for potential losses during sample handling, and compounds were identified by comparison with external standards. Compound-specific δ2H and δ13C values were determined by gas chromatography-isotope ratio mass spectrometry (GC-IRMS) and normalized to the VSMOW-SLAP (δ2H) and VPDB (δ13C) scales. Analytical precision was ±3-5 ‰ for δ2H and ±0.2–0.3 ‰ for δ13C. The dataset was generated to reconstruct past hydroclimate and vegetation dynamics in Central Europe using plant wax δ2H records. Full methodological details are provided in the study: Central Europe hydroclimate since the Younger Dryas inferred from vegetation-corrected sedimentary plant wax δ2H values (Santos et al., 2026).

Analysis of the impact of erosion efficiency on the evolution of rift-inversion orogens and associated serpentinization-derived natural H2 resources, using numerical modelling methods

This data set includes videos depicting the evolution of six numerical tectonic models of rift-inversion orogens. For these models we apply the 2D thermo-mechanical geodynamic code ASPECT, coupled with FastScape for the inclusion of surface processes. With the results from these models, we examine mantle serpentinization in rift-inversion orogens, and their associated natural hydrogen gas (H2) potential. Detailed descriptions of the model set-up and results can be found in Zwaan et al. (2026) in JGR Solid Earth. The software used for this research can be found in a Zwaan et al. (2026) Zenodo software publication.

Biologische Wasserstoffproduktion aus Biomassefeststoffen, Teilvorhaben: Anwendung und Optimierung der biologischen Wasserstofferzeugung auf eine erweitertes Reststoffspektrum

Wasserstoff spielt eine entscheidende Rolle in Bezug auf die angestrebte Energiewende. Im Forschungsprojekt SolidScore wird mit Hilfe der innovativen Biowasserstofftechnologie das vorhandene Spektrum der bisher zur biologischen Wasserstofferzeugung genutzten wässrigen Ausgangssubstrate erweitert. Vor diesem Hintergrund wird untersucht, inwieweit sich Reststoffe, wie zum Beispiel Bioabfälle und landwirtschaftliche bzw. pflanzliche Reststoffe, mit einem Trockenrückstand (TR) größer als 10 % eignen. Das grundlegende Prinzip ist die dunkle Fermentation. Herkömmliche Verfahren wie die Hochtemperatur-Elektrolyse oder die Dampfreformierung sind sehr energieintensiv und verwenden zumeist fossile Brennstoffe. Die biologische Wasserstofferzeugung mit Rest- und Abfallstoffen ist klimafreundlich und CO2-neutral. Im Vergleich zu den anderen biologischen Verfahren zur Wasserstofferzeugung ist die dunkle Fermentation technologisch am weitesten fortgeschritten. Es ist ein anaerobes Verfahren, bei dem organische Substrate unter Abwesenheit von Licht zu Wasserstoff (H2) und Kohlenstoffdioxid (CO2) sowie flüchtigen organischen Säuren (FOS) abgebaut werden. Versuche zeigten, dass vor allem Abwasser aus der Nahrungsmittelindustrie für die Biowasserstofferzeugung geeignet sind. Gleichzeitig konnten aber auch Limitierungen der einsetzbaren Substrate aufgezeigt werden. Das Projekt SolidScore hat das Ziel, das Reststoffspektrum der verwendbaren Substrate und somit die Einsetzbarkeit des Verfahrens deutlich zu erweitern. Darüber hinaus führt die Implementierung der dunklen Fermentation in Bioenergieanlagen zu einer Steigerung der Gesamteffizienz. Am Beispiel der Vergärung von Kohlenhydraten kann durch das im Antrag beschriebene 2-stufige Verfahren eine Gesamteffizienzsteigerung erzielt werden. Zusätzlich werden im Rahmen des Projektes Konzepte zur weiteren Verwendung des so erzeugten Wasserstoffs erstellt. Dies beinhaltet zum Beispiel auch die innerbetriebliche Nutzung des Wasserstoffs.

Wasserstoffspeicher

Neue billige, leichte Wasserstoffspeicher. Zur Zeit Untersuchung von Mg- und Ca-Verbindungen. Ca-Mg-Ni-System.

Die Zukunft des Transports von Wasserstoff gebunden an den Feststoff Eisen, HIT: Die Zukunft des Transports von Wasserstoff gebunden an den Feststoff Eisen

Erschließung und Versorgung von Bestandsgebäuden und Neubauentwicklungen der Stadt Bad Lauchstädt mit klimaneutraler Wärme, Teilvorhaben: Entwicklung von Versorgungskonzepten mit Abwärme und Wasserstoff aus Großelektrolysen

Nutzung von Wasserstoff als Energieträger in der Produktionskette Milchvieh zur Minderung von Treibhausgasemissionen, Teilprojekt B

DDI: Pilotprojekt zur prozessintegrierten Herstellung getemperter Tone als dekarbonisierter Zementhauptbestandteil im Zementwerk Rohrdorf

Whole rock mineralogy and organic parameters of Opalinus Clay: insights from sediment cores from the Swabian Alb (southern Germany)

The Middle Jurassic Opalinus Clay (OPA) in Switzerland and southern Germany is regarded as a potential host rock for the disposal of high-level radioactive waste. This study investigates sediment samples from drill cores taken from the Swabian Alb region (southern Germany) and employs a facies-based approach combined with mineralogical analyses, measurements of cation exchange capacity (CEC), LECO C/S analyses, and Rock-Eval pyrolysis. Results are based on analyses of two fully cored scientific drillings conducted by the Federal Institute for Geosciences and Natural Resources (BGR) in the framework of the research project "SEPIA" in the Swabian Alb in Baden-Württemberg, southern Germany. The drill sites are located in the vicinity of the villages Metzingen (48.51149° N, 9.26464° E) and Röttingen (48.89905° N, 10.29520° E). At the drilling sites, the OPA is between approx. 100 m – 150 m thick and overlain by 50 m – 70 m of overburden. In Germany, the OPA can be lithostratigraphically divided into two subunits: the Teufelsloch member and the overlying Zillhausen member. This division is based on a combined lithological and stratigraphic framework (Dietze et al., 2021). Regarding lithofacies, the OPA in Switzerland and southern Germany can be broadly divided into several distinct units ("facies associations" according to Zimmerli et al., 2024). For Germany, the following three lithological facies associations (FA) were identified based on a subfacies approach: (1) a lower part that is rich in clay (FA-1), (2) a middle part that is silty (FA-2) and (3) an upper part that is silty and interbedded with calcareous(-sandy) beds (FA-3). XRD patterns of whole rock material were recorded using a PANalytical X'Pert PRO MPD θ - θ diffractometer (Co-Kα radiation generated at 40 kV and 40 mA). The samples were investigated from 3° to 80° 2 θ with a step size of 0.03° 2 θ and a measuring time of 3 sec per step. Quantitative Rietveld refinements of the experimental XRD data were conducted using the software Profex/BGMN (Döbelin & Kleeberg, 2015; Bergmann et al., 1998). Determination of cation exchange capacity (CEC) was carried out using always two different samples masses (typically 400 and 600 mg) according to the method of Meier and Kahr (1999), based on a Cu(II)triethylentetramine complex ("Cu-trien method") and measurement using VIS spectroscopy. According to Dohrmann et al. (2012), the analytical error as determined for high-CEC bentonites is generally smaller than ±3.9 cmol(+)kg⁻¹. The total carbon (TC), total organic carbon (TOC), and total sulfur (TS) were determined using a LECO CS-230 system (Laboratory Equipment Corporation). Samples were heated up to 2000 °C under an oxygen atmosphere and an infrared detector subsequently measured the amount of produced CO₂ and SO₂. TOC was measured the same way after removing inorganic carbonates using 10 % HCl solution at 80 °C. Rock-Eval Pyrolyses were performed on a Rock-Eval-6 analyser (Vinci Technologies) using up to 180 mg initial sample material and a standard program (Espitalié et al., 1977; Lafargue et al., 1998), starting isothermal with 300°C for 3 min, succeeded by a heating rate of 25°C/min up to 650°C. Standard deviations for hydrogen indices (HI) and Tmax values are ± 5 % and ± 2°C, respectively. The findings of this study underscore the importance of integrating lithofacies studies with mineralogical investigations to effectively assess the variability and comparability of clay-rich host rocks suitable for radioactive waste disposal.

Activites microbiennes aerobies associees a l'evolution d'une decharge controlee (FRA)

Deux aspects principaux: 1. Etude de l'oxydation des composes volatils et des gaz produits par la decharge, particulierement le methane et l'hydrogene, dans la terre de couverture et dans d'eventuels biofiltres. 2. Etude des phenomenes associes au retour de conditions aerobies a la peripherie d'une decharge: thermogenese, compostage et oxydation du methane. (FRA)

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