Thomas Wietsma

Experimental Investigation of Sr-90 Subsurface Contamination Sequestration in Hanford 100N Area Sediments by Surface Infiltration of an Apatite Solution

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James Szecsody

Project type

Large-Scale EMSL Research

Strontium-90 (Sr-90) discharge from past-practice liquid waste disposal sites in the Hanford 100N area have resulted in Sr-90 release to groundwater, Columbia River, and biota on the Columbia River…

Subsurface Behavior of Ethanol-Blended Gasoline: Intermediate-Scale Flow Cell Experimentation to Develop a Data Base for Numerical Model Testing and Verification

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Mart Oostrom

Project type

Exploratory Research

The main objective of the proposed experimental effort is to develop an initial data set for subsurface blended-gasoline flow and transport that can be used to test and verify the multifluid flow…

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…

Demonstration of the Capability of Mobility-Controlled-Flooding Technology to Overcome Heterogeneity Induced Bypassing in Subsurface Remediation (PNNL LDRD #90001
Overcoming Heterogeneity Induced Bypassing)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Lirong Zhong

Project type

Exploratory Research

Introduction Heterogeneity induces bypassing of low-permeability zones in subsurface fluid flooding operations for remediation purposes. The contaminant in the bypassed areas is therefore…

Subsurface Reductive Elimination of Trichloroethylene using Zero-Valent Iron Emplaced by Polymer Solutions

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Truex

Project type

Large-Scale EMSL Research

Zero-valent iron (ZVI) has been used for in situ remediation of inorganic compounds and chlorinated solvents through engineered permeable reactive barriers and injectable ZVI particles. A key aspect…

Determination of Water Saturation in Relatively Dry and Desiccated Porous Media using Gas-phase Partitioning Tracer Tests

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Michael Truex

Project type

Exploratory Research

Soil desiccation (drying), involving water evaporation induced by dry air injection and extraction, is a potentially robust remediation process to slow migration of inorganic or radionuclide…

Imaging and Analysis of Root System Architecture with an Automated Non-invasive Phenotyping System

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Amir Ahkami

We will deploy a Non-invasive Automated Root Imager (NARI) System for the capture and image analysis of root traits to EMSL user community. The NARI system is partially assembled and once completed…

Thrust 4: Model Hematite Thin Films and Bacterial Iron Reduction (LDRD: Cytochrome and Whole Cell Interactions with Iron Oxides)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Timothy Droubay

Project type

Grand Challenge

This LDRD project is the fourth one associated with the Biogeochemistry Grand Challenge (BGC). Its overall goal is to develop new capabilities and materials as needed to understand the molecular…

Coprecipitation of Aluminum Hydroxides and Calcium Carbonates during Denitrification: A Stabilization Strategy for Oxidized Metals and Radionuclides

Lead Institution

Oregon State University

Principal Investigator

Jonathan Istok

Project type

Large-Scale EMSL Research

Research conducted at the Field Research Center (FRC) at Oak Ridge National Laboratory and at the Old Rifle site has demonstrated that it is possible to stimulate indigenous microbial activity and…

S & T Road Mapping for Needs From All Sources (Zachara EM-ST, PNNL Scope #30998)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

Project type

Exploratory Research

Hanford Remediation and Closure Science Project The Hanford Site Groundwater Protection Program, formerly the Groundwater/ Vadose Zone Integration Project, was established in 1997 to develop the…

X Ray Tomography of Intact Hanford Cores

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Adam Mangel

We propose to use XCT to generate 3-D images of sediment cores to aid in describing the physical characteristics of the subsurface. Intact core from the Hanford Central Plateau require sediment…

EMSL Science Overview

Thomas Wietsma

Projects

Experimental Investigation of Sr-90 Subsurface Contamination Sequestration in Hanford 100N Area Sediments by Surface Infiltration of an Apatite Solution

Subsurface Behavior of Ethanol-Blended Gasoline: Intermediate-Scale Flow Cell Experimentation to Develop a Data Base for Numerical Model Testing and Verification

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

Demonstration of the Capability of Mobility-Controlled-Flooding Technology to Overcome Heterogeneity Induced Bypassing in Subsurface Remediation (PNNL LDRD #90001
Overcoming Heterogeneity Induced Bypassing)

Subsurface Reductive Elimination of Trichloroethylene using Zero-Valent Iron Emplaced by Polymer Solutions

Determination of Water Saturation in Relatively Dry and Desiccated Porous Media using Gas-phase Partitioning Tracer Tests

Imaging and Analysis of Root System Architecture with an Automated Non-invasive Phenotyping System

Thrust 4: Model Hematite Thin Films and Bacterial Iron Reduction (LDRD: Cytochrome and Whole Cell Interactions with Iron Oxides)

Coprecipitation of Aluminum Hydroxides and Calcium Carbonates during Denitrification: A Stabilization Strategy for Oxidized Metals and Radionuclides

S & T Road Mapping for Needs From All Sources (Zachara EM-ST, PNNL Scope #30998)

X Ray Tomography of Intact Hanford Cores