Zheming Wang

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…

Establish a Penn State Center for Environmental Kinetics - as part of the Environmental Molecular Science Institute (EMSI) program (NSF/DOE-OBER) [PNNL Scope #47287, Zachara EMSI)

Lead Institution

Pennsylvania State University

Principal Investigator

William Burgos

Project type

Exploratory Research

The National Science Foundation has awarded a team of Penn State researchers $6.7 million to establish a new center for the study of environmental kinetics. Susan L. Brantley, director of the…

Linking Microscopic to Macroscopic Adsorption/Desorption Behavior for Uranium on Environmental Materials

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Kevin Rosso

Project type

Large-Scale EMSL Research

This Science Theme proposal requests EMSL access for a subtask on an existing funded project at PNNL. The task is focused on determination of molecular-scale adsorption, desorption, and…

Characterization of U(VI) Sorption-Desorption Processes and Model Upscaling (Zachara, EMSP-U, PNNL Scope #43914)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

John Zachara

Project type

Exploratory Research

Develop experimental data, process-level models, and up-scaling approaches to improve capabilities to model U(VI) transport in heterogeneous vadose zone and groundwater plumes.

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…

The Kinetics of Direct Enzymatic Reduction of Uranium (VI): Effects of Ligand Complexation and U(VI) Speciation (Ainsworth NABIR, PNNL Scope # 42335)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Calvin Ainsworth

Project type

Exploratory Research

Experimental studies of U(VI) reduction by AH2DS have shown that the aqueous uranyl ion and its hydrolysis products are reduced at significantly slower rates compared with Fe(III). While reduction…

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…

Microscopic Mass Transfer on U(VI) and Tc(VIII) in Subsurface sediments

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Chongxuan Liu

Project type

Limited Scope

This project will investigate microscopic mass transfer process and its influence on and coupling with geochemical and biogeochemical reactions in subsurface sediments. The research will focus on…

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…

An In-situ Investigation of a-AlOOH Dissolution under High pH Conditions

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Edgar Buck

The dissolution and precipitation of gibbsite [a-Al(OH)3] and boehmite [a-AlOOH] is of prime importance to the final disposition of high-level nuclear waste (HLW) stored at the Hanford Site. The high…

Nanoengineered Electrochemical Sensors for Mixed Wastes (PNNL SCOPE # 45409)

Lead Institution

Washington State University

Principal Investigator

Yuehe Lin

Project type

Exploratory Research

The required characterization of the DOE?s transuranic (TRU) and mixed wastes (MW) before disposing and treatment of the wastes is currently costly and has lengthy turnaround. Research toward…

Characterization of Synthetic Mixed Valence U Compounds

Lead Institution

The George Washington University

Principal Investigator

Christopher Cahill

Project type

Exploratory Research

The efforts proposed herein will explore the synthetic reaction conditions necessary to produce and stabilize pentavalent uranium oxide species under hydrothermal conditions. U(V) is a fleeting…

Microscopic Mass Transfer of U and Tc in Subsurface Sediments

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Chongxuan Liu

Project type

Exploratory Research

This project will investigate microscopic mass transfer process and its influence on and coupling with geochemical and biogeochemical reactions in subsurface sediments. The research will focus on…

Remediation & Closure Science Project/ Subsurface Science Tasks (Zachara/Freshly, EM-closure, PNNL Scope #47040). [was aka S & T Road Mapping for Needs From All Sources (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…

300 Area Post-Treatment Uranium Solubility

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Zheming Wang

The objective of this study is to investigate the mobility of uranium after reaction of contaminated sediments with phosphate solutions injected at the 300 Area. Boreholes samples that were collected…

Early Transition Metal Oxides as Catalysts (Kay's BES/Chemical Physics-Catalysis WBS0502 of Peden's BES-Chemical Transformations at Complex Interfaces, PNNL Scope #47319)

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

R. Smith

Project type

Exploratory Research

Propose to study the catalytic and surface chemistry of transition metal oxides. We will use molecular beam and surface science techniques to grow and study novel oxide materials. We will focus on…

Zero Emission Research & Technology (ZERT) CO2 Sequestration Leakage Evaluation Task: Parameterization of Leakage from Geologically Sequestered CO2 (PNNL Scope # 46379).

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Christopher Thompson

Project type

Exploratory Research

Understanding, characterizing, and ultimately quantifying leakage rates of geologically sequestered CO2 through the confining layers (caprock) is critical to site monitoring and verification (SMV),…

Role of Microenvironments and Transition Zones in Subsurface Reactive Contaminant Transport

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

James McKinley

Project type

Exploratory Research

The PNNL Scientific Focus Area (SFA) will resolve critical Hanford and basic subsurface science issues through integrated, multi-disciplinary, science-theme focused research on the role of…

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

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…

The Organic Surfactant Pool on Secondary Organic Aerosol Particles

Lead Institution

Northwestern University

Principal Investigator

Franz Geiger

Project type

Large-Scale EMSL Research

Secondary organic aerosol (SOA) particles particles rank among the least understood atmospheric constituents in the climate system. Key questions concern their poorly quantified roles in cloud…

CONTROLLED DEFECT GENERATION IN POROUS SILICON

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Donald Baer

Project type

Exploratory Research

Nanoporous silicon surface has been subject to considerable study because of its photoemmsion properties and possible opto-chemical, gas and bio sensing applications. The ability to get controlled…

Evaluation of Pore scale porous media effects on reactive transport in groundwater

Lead Institution

University of Texas at Austin

Principal Investigator

Charles Werth

Project type

Exploratory Research

We request use of the EMSL Subsurface Flow and Transport Laboratory?s syringe pumps and work space in order for Thomas Willingham to complete the experimental phase of his Doctoral Research…

The Aqueous Thermodynamics and Complexation Reactions of Anionic Silica and Uranium Species to High Concentration. (Felmy ESMP-silicate, PNNL Scope #30944)

Lead Institution

Washington State University

Principal Investigator

Andrew Felmy

Project type

Exploratory Research

Highly basic tank wastes contain several important radionuclides, including 90Sr, 99Tc, and 60Co, as well as actinide elements (i.e., isotopes of U, Pu, and Am). These highly basic tank wastes are …

Characterization of Chemical Changes Observed for Uranium Particulate Materials

Lead Institution

Savannah River National Laboratory

Principal Investigator

Glenn Fugate

Project type

Exploratory Research

Small uranium particulates emanating from nuclear fuel cycle and weaponization processes can be collected at significant distances from their source. The chemical and physical characteristics of…

Organic enrichment of sea spray aerosols: from the air-water interface to spray generation

Lead Institution

Montana State University

Principal Investigator

Robert Walker

Project type

Large-Scale EMSL Research

This proposal describes coupled studies intended to identify and quantify the origin of organic solutes in sea spray aerosols (SSA) and to predict the consequences of aerosol organic enrichment on…

EMSL Science Overview

Zheming Wang

Projects

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

Establish a Penn State Center for Environmental Kinetics - as part of the Environmental Molecular Science Institute (EMSI) program (NSF/DOE-OBER) [PNNL Scope #47287, Zachara EMSI)

Linking Microscopic to Macroscopic Adsorption/Desorption Behavior for Uranium on Environmental Materials

Characterization of U(VI) Sorption-Desorption Processes and Model Upscaling (Zachara, EMSP-U, PNNL Scope #43914)

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

The Kinetics of Direct Enzymatic Reduction of Uranium (VI): Effects of Ligand Complexation and U(VI) Speciation (Ainsworth NABIR, PNNL Scope # 42335)

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

Microscopic Mass Transfer on U(VI) and Tc(VIII) in Subsurface sediments

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

An In-situ Investigation of a-AlOOH Dissolution under High pH Conditions

Nanoengineered Electrochemical Sensors for Mixed Wastes (PNNL SCOPE # 45409)

Characterization of Synthetic Mixed Valence U Compounds

Microscopic Mass Transfer of U and Tc in Subsurface Sediments

Remediation & Closure Science Project/ Subsurface Science Tasks (Zachara/Freshly, EM-closure, PNNL Scope #47040). [was aka S & T Road Mapping for Needs From All Sources (PNNL Scope #30998)].

300 Area Post-Treatment Uranium Solubility

Early Transition Metal Oxides as Catalysts (Kay's BES/Chemical Physics-Catalysis WBS0502 of Peden's BES-Chemical Transformations at Complex Interfaces, PNNL Scope #47319)

Zero Emission Research & Technology (ZERT) CO2 Sequestration Leakage Evaluation Task: Parameterization of Leakage from Geologically Sequestered CO2 (PNNL Scope # 46379).

Role of Microenvironments and Transition Zones in Subsurface Reactive Contaminant Transport

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

The Organic Surfactant Pool on Secondary Organic Aerosol Particles

CONTROLLED DEFECT GENERATION IN POROUS SILICON

Evaluation of Pore scale porous media effects on reactive transport in groundwater

The Aqueous Thermodynamics and Complexation Reactions of Anionic Silica and Uranium Species to High Concentration. (Felmy ESMP-silicate, PNNL Scope #30944)

Characterization of Chemical Changes Observed for Uranium Particulate Materials

Organic enrichment of sea spray aerosols: from the air-water interface to spray generation