Thomas Wietsma

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

Exploratory Research

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…

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

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

This is a renewal proposal for a previous collaborative effort between the PNNL Scientific Focus Area (SFA) and EMSL.PNNL Scientific Focus Area. The PNNL SFA will develop a predictive understanding…

An Integrated Approach to Quantifying the Coupled Biotic and Abiotic Mechanism, Rates and Long-Term Performance of Phosphate Barriers for In Situ Immobilization of Uranium

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Dawn Wellman

Project type

Large-Scale EMSL Research

Operations related to nuclear energy and weapons production have resulted in numerous areas, worldwide, exhibiting surface and subsurface uranium contamination of geologic media. Within the United…

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…

Rhizosphere processes at molecular to core scale

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Nancy Hess

The amount of C in soil far exceeds the C content of atmosphere as well as the amount C stored above ground as plant biomass. The C fluxes between atmosphere and biomass are huge, many orders of…

Desiccation of Porous Media to Limit Contaminant Migration

Lead Institution

Auburn University

Principal Investigator

Jacob Dane

Project type

Large-Scale EMSL Research

The primary attribute of soil desiccation is the removal of excess moisture from the subsurface, thereby reducing potential downward migration of water and contaminant solutes within the vadose zone…

Pore-Scale Investigation of the Impacts of Transverse Mixing and Solution Chemistry on Mineral Precipitation Relevant to CO2 Sequestration

Lead Institution

ExxonMobil Research and Engineering

Principal Investigator

Changyong Zhang

Project type

Exploratory Research

Transverse mixing limited reactive transport resulting in mineral precipitation impact groundwater remediation and geological sequestration of CO2, due to reductions in effective porosity and…

Influences of Hydrologic Exchange Flows on River Corridor and Watershed Biogeochemical Function

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James Stegen

We are developing predictive understanding of the processes that govern influences of hydrologic exchange flows on water quality, nutrient dynamics, and ecosystem health in dynamic river corridor…

Determining the Effects of Organic Chemical Mixtures and Wastewater on DNAPL Migration

Lead Institution

Sandia National Laboratory

Principal Investigator

Hongkyu Yoon

Project type

Large-Scale EMSL Research

DNAPL spill and water discharge scenarios at the ground surface may significantly impact DNAPL migration, entrapment, and subsequent effects on groundwater quality. A notable example is the Hanford…

A Novel Experimental Method to Obtain Apparent Viscosity of Shear-Thinning Fluids in Saturated Porous Media

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Mart Oostrom

Project type

Exploratory Research

The Department of Energy (DOE) has recently funded a project to strengthen the science behind the injection of shear-thinning fluids in unconfined subsurface systems. Shear-thinning fluids, usually…

PhenoAccess: Physiological Phenotyping of Brachypodium Accessions

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Amir Ahkami

Although the effects of elevated CO2 on plant growth, physiology and metabolism has been investigated thoroughly, the underlying integrated organismal, cellular and molecular mechanisms of these…

EMSL Science Overview

Thomas Wietsma

Projects

Role of Microenvironments and Transition Zones in Field scale microbial ecology and biogeochemistry

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

An Integrated Approach to Quantifying the Coupled Biotic and Abiotic Mechanism, Rates and Long-Term Performance of Phosphate Barriers for In Situ Immobilization of Uranium

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

Rhizosphere processes at molecular to core scale

Desiccation of Porous Media to Limit Contaminant Migration

Pore-Scale Investigation of the Impacts of Transverse Mixing and Solution Chemistry on Mineral Precipitation Relevant to CO2 Sequestration

Influences of Hydrologic Exchange Flows on River Corridor and Watershed Biogeochemical Function

Determining the Effects of Organic Chemical Mixtures and Wastewater on DNAPL Migration

A Novel Experimental Method to Obtain Apparent Viscosity of Shear-Thinning Fluids in Saturated Porous Media

PhenoAccess: Physiological Phenotyping of Brachypodium Accessions