Kevin Rosso

Role of Microenvironments and Transition Zones in Field Scale Microbial Ecology and Biogeochemistry

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

Project type

Limited Scope

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL. The research proposed will resolve critical Hanford and basic subsurface science…

Proof-of-principle work using CeO2 as an analogue to understand surface species and interactions between adsorbed chloride and water on stored PuO2

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Carolyn Pearce

Project type

Limited Scope

Radiation induced degradation of chlorinated polymers, such as poly(vinyl chloride) (PVC), used historically in packaging of plutonium oxide (PuO2), has led to chloride-contaminated PuO2, which…

Solar Photolysis of Dissolved Organic Matter in the Presence of Iron Oxide Nanoparticles

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Kevin Rosso

Project type

Limited Scope

We propose to conduct the photodegradation on two dissolved organic matter (DOM) samples in the presence of hematite nanoparticles under solar light for the first time. This treatment will produce…

Reductive Transformation of Iron Oxides: Coupled Solution and Solid-State Pathways

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Kevin Rosso

Project type

Large-Scale EMSL Research

Reductive transformation of Fe(III)-oxides such as &#61537; Fe2O3 (hematite) by aqueous dissolution / re precipitation is a central part of the natural biogeochemical iron cycle in the…

Multiscale Processes of Heteroepitaxial Nucleation and Growth at Mineral-Water Interfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Sebastien Kerisit

Project type

Exploratory Research

The goal of the proposed research is to elucidate the mechanisms and quantify the rates of heteroepitaxial nucleation and growth at mineral-water interfaces. Despite several examples of heteroepitaxy…

Mineral Reactivity and Transformations in Adsorbed Water Films

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Loring

Project type

Large-Scale EMSL Research

Transformations of minerals covered in thin films of adsorbed H2O are ubiquitous in nature and occur under unique chemical and physical constraints. But in contrast to bulk aqueous systems,…

Understanding Mechanisms Coupling the Fates of Iron Oxides, Organic Matter, and Micronutrient Metals at Redox Hot Spots

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Kevin Rosso

Project type

Large-Scale EMSL Research

Iron (oxyhydr)oxide minerals are ubiquitous in soils and sediments and play an commanding role in nutrient cycling, microbial metabolism, carbon protection, and contaminant immobilization. Among them…

Controlling the Thermal and Non-Thermal Reactivities of Metal Oxide Structures Through Nanoscaling - Controlling Reactivities of Metal Oxide Strcutures(Mike Henderson's BES Project - 43626)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Henderson

Project type

Exploratory Research

The constrained dimensions in nanoscaled materials produces unique chemical properties that will form the basis for important new technologies. A key scientific challenge is to understand how to…

Microscale and spectroscopic investigations in geochemical and microbiological systems

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

Project type

Large-Scale EMSL Research

Apply experimental manipulation and field investigations to understanding the behavior of selected chemical and microbial components in natural systems. The research is targeted towards compounds…

Interactions Between Fe(III) - Reducing Bacteria and Fe Oxides: Microbial and Geochemical Dissolution Controls (Zachara BES-oxide), PNNL Scope #28036)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

Project type

Exploratory Research

Investigate electron transfer mechanisms involved in bacterial Fe(III) oxide reduction. Work authorization text added 08/11/05: Fe(III) oxides poise the oxidation/reduction potential of…

Hydro-Biogeochemical Process Dynamics in the Groundwater-Surface Water Interaction Zone

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

Lead Institution

J. Craig Venter Institute

Principal Investigator

Yuri Gorby

Project type

Exploratory Research

Scanning tunneling microscopy will be used to image and characterize bacterial appendages produced by iron reducing bacteria that are believed to be involved with the extracellular reduction of iron…

EMSL Science Overview

Kevin Rosso

Projects

Role of Microenvironments and Transition Zones in Field Scale Microbial Ecology and Biogeochemistry

Proof-of-principle work using CeO2 as an analogue to understand surface species and interactions between adsorbed chloride and water on stored PuO2

Solar Photolysis of Dissolved Organic Matter in the Presence of Iron Oxide Nanoparticles

Reductive Transformation of Iron Oxides: Coupled Solution and Solid-State Pathways

Multiscale Processes of Heteroepitaxial Nucleation and Growth at Mineral-Water Interfaces

Mineral Reactivity and Transformations in Adsorbed Water Films

Understanding Mechanisms Coupling the Fates of Iron Oxides, Organic Matter, and Micronutrient Metals at Redox Hot Spots

Controlling the Thermal and Non-Thermal Reactivities of Metal Oxide Structures Through Nanoscaling - Controlling Reactivities of Metal Oxide Strcutures(Mike Henderson's BES Project - 43626)

Microscale and spectroscopic investigations in geochemical and microbiological systems

Interactions Between Fe(III) - Reducing Bacteria and Fe Oxides: Microbial and Geochemical Dissolution Controls (Zachara BES-oxide), PNNL Scope #28036)

Hydro-Biogeochemical Process Dynamics in the Groundwater-Surface Water Interaction Zone

Harnessing Biomineralization Potential of Metal-Oxidizing Bacteria for REE Synthesis

Novel Nanoporous Getters to Immobilize 99Tc at the Yucca Mnt (Mattigod/Felmy/Rosso, Yucka Mtn, PNNL Scope #45873)

Advances in Understanding Electron Transfer Kinetics at Environmental Interfaces

The Role of Microenvironments and Physicochemical Subsurface Components on Field Scale Biogeochemistry and Contaminant Mobility

Mechanisms of Fe(II)-Catalyzed Transformation of Fe(III)-(Oxyhydr)oxides

Conductivity of bacterial nanowires