Increased our understanding of the processes that control the formation of complexes between organic matter and minerals. These complexs are important for preserving organic matter so their formation pathway are an important pat of understanding carbon cycling
Significance and Impact
The results tat redox cycling of subsurface conditions creates a pathway for microbially produced organic matter to become sequestered by association with minerals is a novel observation that needs to be considered when trying to understand the carbon cycle
- Use DOE natural field laboratory at Rifle, CO
- Followed changes in Fe mineralization and carbon chemistry over multiple months as redox conditions in the system cycled,.
- Used advanced synchrotron based spectromicroscopic techniques to characterize the observed changes over time,
- Developed a conceptual model that supports that data and improves our understanding of the system.
Cismasu, A. C.; Williams, K. H.; Nico, P. S. (2016), Iron and Carbon Dynamics during Aging and Reductive Transformation of Biogenic Ferrihydrite, Environmental Science & Technology, 50(1), 25-35, DOI: 10.1021/acs.est.5b03021.