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Research Biogeochemistry

We have worked in collaboration with David Lipson and Ted Raab on the interactions of bacterial iron reduction and humic acid reduction with carbon cycling in arctic peat soils of the northen permafrost areas of Alaska. This project was sponsored through the NSF polar programs. Elliot Friedman has collaborated to produce a video and a presentation that explains why this is important. We have placed electrodes in peat soil as a biogeochemistry tool to quantify bacterial extracellular electron transfer. We have enriched for a community that is involved in microbial electrochemical processes and have used genomic tools to achieve a mechanistic understanding. Metadata will be used in climate modeling approaches. Finally, we have designed and built rugged, field-ready, affordable potentiostats to set the potential, especially for this project.

Electrodes with potentiostats, battery, and solar panel in Barrow, Alaska.