Dr. Fabian Jäger

Ehemaliger Wissenschaftlicher Mitarbeiter (Umwelt- und Bodenchemie)


Since May 2004, Fabian Jäger has been preparing his PhD thesis in the group of Environmental Chemistry. He moved 2006 with the group from Berlin to Koblenz, where he will finish his PhD thesis.

Between May and July 2007, he accomplished a project on T1/T2- and Diffusion measurements in soil samples to characterise the pore size distribution and the effects of swelling of soil organic matter on it (WNMRC06-006) at the Wageningen NMR Centre, Netherlands (http://www.wnmrc.nl/UK/).

Research interests

His research objective addresses the investigation of swelling of soil organic matter (SOM) using 1H NMR relaxometry.

  • Investigation of drying and rewetting processes of SOM
  • Basic calibration for the evaluation of T2 relaxation time distributions (RTD) of soils using organic and inorganic materials as references
  • Verification of 1H NMR results significance in terms of pore size changes due to SOM swelling
  • Investigation of swelling kinetics to gain information about nature, reversibility and velocity of SOM swelling
  • Effects of biofilm on pore size distribution in model soil systems

Curriculum vitae

Fabian Jäger was born in Frankfurt Oder, Germany (former GDR) in 1976. He finished his Diploma degree in Environmental Engineering at the Technical University Berlin in 2004. During his studies he gained a variety of practical experiences:

  • Diploma Thesis "Influence of preferential flow paths on the spatial distribution of lead and antimony in a shooting range soil" at the Swiss Federal Institute of Technology Zürich (ETHZ) in the Institute of Terrestrial Ecology (ITOe), Soil Chemistry (Prof. R. Kretzschmar and Dr. A. Scheinost). Funded by the Schweizerischem Nationalfonds.
  • Student research project "Influence of soil microorganisms on 1H NMR relaxometry in the course of water absorption" at the TU Berlin, Environmental Chemistry- AG Boden (Prof. W. Rotard and Dr. G.E. Schaumann). Funded by the Deutschen Forschungsgesellschaft.
  • ETH Zurich: employed as student staff member in the Soil Chemistry group
  • TU Berlin: employed as student staff member in the INTERURBAN research group


Jaeger, F.; N. Rudolph; F. Lang und G. E. Schaumann (in press):
Effects of soil solution’s constituents on proton NMR relaxometry of soil samples. Soil Sci. Soc. Am. J.
Jaeger, F.; E. Grohmann und G. E. Schaumann (2007a):
Microbial and swelling effects on pore size distribution in humous soil samples. Magn. Reson. Imaging 25(Special Issue Bologna 2006), 581.
DOI: 10.1016/j.mri.2007.01.093
Jaeger, F.; H. Korn; U. Boeckelmann und G. E. Schaumann (2007b):
Effects of biofilms on pore size distribution in glass bead reactors studied by 1H NMR relaxometry. Magnetic Resonance Imaging 25(Special Issue Bologna 2006), 564-565.
DOI: 10.1016/j.mri.2007.01.055
Jaeger, F.; E. Grohmann; U. Boeckelmann und G. E. Schaumann (2006a):
Microbial effects on 1H NMR Relaxometry in soil samples and glass bead reactors. In: F. H. Frimmel and G. Abbt-Braun: Humic Substances - Linking Structure to Functions. Proceedings of the 13th Meeting of the International Humic Substances Societyin Karlsruhe. Universität Karlsruhe, Karlsruhe, 45-II, 929-932.
Jaeger, F.; E. Grohmann und G. E. Schaumann (2006b):
1H NMR Relaxometry in natural humous soil samples: Insights in microbial effects on relaxation time distributions. Plant and Soil 280(1-2), 209-222.
DOI: 10.1007/s11104-005-3035-4
Jaeger, F.; E. Grohmann und G. E. Schaumann (2005a):
Do swelling and microbial activity affect pore size distribution in humous soil samples? Geophysical Research Abstracts 7(SSS9: Quantification of soil structure and soil porosity changes caused by natural and anthropogenic affects), EGU05-A-02313; SSS9-1MO3P-0262.
Jaeger, F.; M. Oezaslan und G. E. Schaumann (2005b):
1H NMR Relaxometrie in porösen Medien: Die Bedeutung von gelösten paramagnetischen und organischen Substanzen. Mitteilungen der deutschen Bodenkundlichen Gesellschaft 107(1), 139-140.
Jaeger, F.; A. Scheinost; D. Vantelon; I. Xifra und R. Kretzschmar (2003):
Einfluss präferentieller Fliesswege auf die Verlagerung von Pb und Sb in einem Schiessplatzboden. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 102(1), 189-190.


1H NMR relaxometry, Swelling of Soil Organic Matter (SOM), Relaxation time distribution, Pore size distribution