Isotopes of dissolved oxygen as dynamic tracers for aerobic turnover in surface and shallow groundwaters (IsoDO)

• Applicants: Professor Johannes Barth, Ph.D.; Dr. Christian Schmidt
• Subject Area: Hydrogeology, Hydrology, Limnology, Urban Water Management, Water Chemistry, Integrated Water Resources Management ; Mineralogy, Petrology and Geochemistry
• Term: from 2015 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 290026025

• Final Report Year: 2021

Final Report Abstract

The project was able to establish a so far hardly practised technique of stable isotope analyses on dissolved oxygen in terrestrial water systems. This method can serve as a useful addition to dissolved oxygen concentration measurements. With its additional information it can reveal sources and sinks of oxygen as one of the most fundamental parameters for ecosystem functioning. The work helped to advance collaborations between the University of Erlangen and the Helmholtz Zentrum für Umweltforschung (UFZ) in environmental research. The applied stable isotope technique was also useful to open further links to other research groups in Chemistry and Bioengineering. The presented work shows that the technique is very promising to deepen interdisciplinary research approaches in environmental and aqueous sciences. It is promising for applications in future investigations of groundwater, limnology and river studies and of will also be open for use in other fields including, Chemistry, Engineering and Biology.

Publications

• (2017) A new approach to quantify system efficiency with dissolved oxygen isotopes during engineered growth of Galdieria sulphuraria. Algal Research 26, 294-301
  Mader, M., Schwerna, P., Buchholz, R., van Geldern, R. and Barth, J.A.C.
  
• (2017) Dissolved oxygen in water and its stable isotope effects: A review. Chemical Geology 473, 10-21
  Mader, M., Schmidt, C., van Geldern, R. and Barth, J.A.C.
  
• 2017, Stable Isotopes of Dissolved Oxygen as Dynamic Tracers for Carbon, Nutrient and Oxide Phases Turnover in Natural and Engineered Water Systems. Vom Wasser, 114 (2016) 2, 43– 86. Wasser 2016 (Jahrestagung der Wasserchemischen Gesellschaft), 02.-04. May 2016 Bamberg
  Mader, M., Schmidt, C., Schwerna, P., van Geldern, R., Barth, J.A.C.
  
• 2017. A First Technical Approach To Quantify System Efficiency With Stable Isotopes Of Dissolved Oxygen During Engineered Growth Of Galdieria Sulphuraria. ASI 2017 – (Jahrestagung der Arbeitsgemeinschaft Stabile Isotope e.V.), 09. – 11. November 2017 Hannover
  Mader, M., Schmidt, C., van Geldern, R., Barth, J.A.C.
  
• 2017. Disentangling dissolved oxygen sources in shallow riparian groundwater by stable isotope analysis. EGU General Assembly 2017, 24. – 28. April 2017, Vienna, Austria
  Mader, M., Porst, D., Schmidt, C., van Geldern, R., Barth, J.A.C.
  
• (2018) Direct oxygen isotope effect identifies the ratedetermining step of electrocatalytic OER at an oxidic surface. Nature Communications, (2018) 2019:4565
  Haschke, S., Mader, M., Schlicht, S., Roberts, A.M., Angeles-Boza, A.M., Barth, J.A.C. and Bachmann, J.
  
• (2018) River recharge versus O2 supply from the unsaturated zone in shallow riparian groundwater: A case study from the Selke River (Germany). Science of the Total Environment 634, 374-381
  Mader, M., Roberts, A.M., Porst, D., Schmidt, C., Trauth, N., van Geldern, R. and Barth, J.A.C.
  
• (2020) Beware of effects on isotopes of dissolved oxygen during storage of natural iron-rich water samples: A technical note. Rapid Communications in Mass Spectrometry, e9024
  Köhler, I., Piatka, D., Barth, J.A.C. and Martinez, R.E.