Advanced mass spectrometry for relating speciation to reactivity: Surface-subsurface carbon cycling
EMSL Project ID
49172
Abstract
Justification for requesting Rapid Access: These Data are urgently needed for preparing a proposal by the collaborative affords of LBNL, PNNL and ORNL. The proposal is to respond a recent DOE/BER/SBR workshop “The Role of interfaces in Predicting Hydrology-Driven Biogeochemical Impacts to Watersheds and River Basins”. The proposal deadline is early February 2016. The recent advances in Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) are now opening up opportunities to greatly expand knowledge on the nature of complex natural organic molecules. We propose to utilize this powerful tool to gain insights into the molecular composition of soil/sediment organic matter (SOM) within different and interconnected surface-subsurface environment and to better understand SOM transport and transformation in pore waters over time (seasons) and depths (through transport into different biogeochemical zones). Such analyses will improve understanding of relations between DOM structure, partitioning between aqueous and adsorbed phases, and its susceptibility to microbial degradation. Specifically we plan to obtain basic information on molecular weight distributions and relative abundances of different functional groups of DOM in pore waters: (1) already collected from the Rifle Site floodplain along the Colorado River in Colorado (USA), with 200 spatially and temporally resolved samples collected over the past 16 months; and (2) to be collected from a set of just designed long term (12 months) column experiments simulating field conditions albeit under controlled laboratory conditions.
Project Details
Project type
Limited Scope
Start Date
2015-11-20
End Date
2016-01-20
Status
Closed
Released Data Link
Team
Principal Investigator