Eric Roden

Spectroscopic Confirmation of Enzymatic Oxidation of Structural Fe(II) in Biotite by a Lithoautotrophic Fe(II)-oxidizing Bacterial Culture

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

Limited Scope

The key rationale for submission of this rapid access user proposal is that we are nearing closure on the novel discovery of the potential for enzymatic oxidation of Fe(II) in biotite (see below),…

Coupling Microbial Communities to Carbon and Contaminant Biogeochemistry in the Groundwater-Surface Water Interaction Zone

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James Stegen

Project type

FICUS Research

The proposed study will integrate molecular data generated through a combination of JGI and EMSL capabilities to support research activities under the Subsurface Biogeochemical Research-Science Focus…

The effect of trace element content on the rate of biotic and abiotic pyrite oxidation

Lead Institution

University of California, Riverside

Principal Investigator

Timothy Lyons

Project type

Exploratory Research

The oxidation of pyrite is a common source of toxic trace elements and acid generation in many contaminated systems. A key component in understanding the potential threat to ecosystems and possible…

The effect of trace element content on the rate of biotic and abiotic pyrite oxidation

Lead Institution

University of California, Riverside

Principal Investigator

Timothy Lyons

Project type

Large-Scale EMSL Research

The oxidation of pyrite is a common source of toxic trace elements and acid generation in many contaminated systems. A key component in understanding the potential threat to ecosystems and possible…

Tracking the degradation of fresh particulate organic matter in permeable riverbed sediments using FT-ICR-MS and metagenomic/transcriptomic sequencing

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

FICUS Research

The hyporheic zone, where groundwater and river water mix within riverine corridors, represents a highly active zone of biogeochemical cycling in which key transformations of many critical elements…

Mössbauer Analysis of Microbial Redox Transformations of Naturally Occurring Fe(III)-bearing Phyllosilicates

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Evgenya Shelobolina

Project type

Large-Scale EMSL Research

The abundance of ferric iron in sedimentary environments and its ability to accept and donate electrons makes it important electron acceptor for microbial metabolism. Fe(III) in the structure of…

Micro-Mineralogical Analysis of Strontium in Biogenic Carbonate Minerals

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

Exploratory Research

In recent EMSP-funded research (96-10 program), we have documented the potential for solid-phase capture of strontium (Sr) during carbonate mineral formation coupled to bacterial reduction of…

Mineralogical analysis of substrates and end-products of microbial Fe redox transformations

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

Exploratory Research

Current DOE-funded (EMSP and NABIR programs) research at The University of Alabama (UA) is directed toward understanding the influence of microbially-catalyzed redox transformations of Fe-bearing…

Mineralogical analysis of substrates and end-products of microbial Fe redox transformations

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

Exploratory Research

Current DOE-funded (EMSP and NABIR programs) research at The University of Alabama (UA) is directed toward understanding the influence of microbially-catalyzed redox transformations of Fe-bearing…

TEM analysis of cell/Fe(III) oxide aggregates produced by a chemolithoautotrophic Fe(II)-oxidizing, nitrate-reducing enrichment culture

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

Limited Scope

We request high-resolution TEM analysis of Fe(III) oxides produced during anaerobic oxidation of soluble Fe(II) (ferrous chloride) by a chemolithoautotrophic Fe(II)-oxidizing, nitrate-reducing…

Mossbauer Analysis of Microbial Redox Transformations of Fe-bearing Phyllosilicate and Oxide Minerals

Lead Institution

University of Wisconsin, Madison

Principal Investigator

Eric Roden

Project type

Large-Scale EMSL Research

Microbial Fe redox transformations have a major impact on the aqueous and solid-phase geochemistry of subsurface environments, as well as on the behavior of various organic and inorganic contaminants…

EMSL Science Overview

Eric Roden

Projects

Spectroscopic Confirmation of Enzymatic Oxidation of Structural Fe(II) in Biotite by a Lithoautotrophic Fe(II)-oxidizing Bacterial Culture

Coupling Microbial Communities to Carbon and Contaminant Biogeochemistry in the Groundwater-Surface Water Interaction Zone

The effect of trace element content on the rate of biotic and abiotic pyrite oxidation

The effect of trace element content on the rate of biotic and abiotic pyrite oxidation

Tracking the degradation of fresh particulate organic matter in permeable riverbed sediments using FT-ICR-MS and metagenomic/transcriptomic sequencing

Mössbauer Analysis of Microbial Redox Transformations of Naturally Occurring Fe(III)-bearing Phyllosilicates

Micro-Mineralogical Analysis of Strontium in Biogenic Carbonate Minerals

Mineralogical analysis of substrates and end-products of microbial Fe redox transformations

Mineralogical analysis of substrates and end-products of microbial Fe redox transformations

TEM analysis of cell/Fe(III) oxide aggregates produced by a chemolithoautotrophic Fe(II)-oxidizing, nitrate-reducing enrichment culture

Mossbauer Analysis of Microbial Redox Transformations of Fe-bearing Phyllosilicate and Oxide Minerals