Biogeochemistry

Arsenic in the groundwater of Bangladesh

• Influence of human waste on arsenic release into drinking water in Bangladesh - geochemical and statistical investigations
• AsFreeH2O: Applicability and social acceptance of water treatment technologies with respect to future sea-level rises
• Geochemical investigations and scientific-technical support regarding the problem of arsenic contamination in Pabna, Bangladesh
• FAARM Marking Tubewells and taking tubewell water samples: Geochemical investigations of drinking water quality in Sylhet, Bangladesh
• Methane in the groundwater of Bangladesh - a driving process for arsenic release
• Electrocoagulation to remove arsenic from groundwater

Breath CH₄ research

• COVID-19 vaccination affects breath CH₄ dynamics

Climate reconstruction using tree rings

• Climate signals in carbon and hydrogen isotope ratios of wood lignin methoxy groups

Greenhouse gases in marine and terrestrial environments

• Methane formation from algae in oxic seawater
• Revising the methane cycling in lakes: sources and sinks in two German lakes with specific consideration of methane accumulation in oxic waters
• Nitrous oxide in the environment
• Iron catalyzed formation of methyl radicals as a common source of environmentally important volatile organic compounds

Interaction of magmatism and salt rocks

• Contribution to sustainable mining

Ozone depleting gases in the atmosphere

• Impact of microorganisms as sinks of atmospheric chloromethane
• Triple element stable isotope signatures for constraining the atmospheric chloromethane budget
• Cruising the marine halomethane cycle: Microbiology, biochemistry and geochemistry of reference bacteria, new microbial players and underlying processes (MAHABIO)

Renewable energy: Optimization of anerobic digestion

• Increasing methane productivity in anaerobic digesters by addition of carbon dioxide
• Energetic use of CO₂ to increase the methane yield during anaerobic digestion of renewable energy crops