C and N NMR spectroscopy as a tool in soil organic matter studies |
| |
| Authors: | Ingrid Kgel-Knabner |
| |
| Institution: | Department of Soil Science, Technical University of Munich, D-85350, Freising-Weihenstephan, Germany |
| |
| Abstract: | Nuclear magnetic resonance (NMR) is a valuable tool for the characterization of soil organic matter and humification processes in soils. This review highlights soil organic matter studies based mainly on solid-state 13C and 15N NMR spectroscopy and some emerging applications, that may provide significant progress in our knowledge on soil organic matter. A major advantage of Nmr spectroscopy is that it can be used as a non-invasive method for solid soil samples or soil fractions. Although resolution is limited, one can obtain an overview on the organic matter structures present in the soil sample. Application of 13C and 15N NMR to soils has, for a long time, been confined to the study of bulk soils or humic extracts for structural characterization. The transformations of soil organic C and N are now being investigated after addition of 13C- and 15N-labelled parent materials to the soil and following their evolution in different C and N pools. With labelling techniques it is also possible to study the interaction of organic pollutants with soil organic matter. Contamination of a soil with man-made additives, such as soot or brown coal dust, can also be detected in soils or individual soil fractions. |
| |
| Keywords: | 13C NMR spectroscopy 15N NMR spectroscopy soil organic matter carbon cycling organic pollutants |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
