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Dawn Wellman

Institution
Pacific Northwest National Laboratory

Projects

Determination of nanoporous material oxidation states

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Dawn Wellman
Project type
Exploratory Research
This proposal is in support of projects associated with the development of novel surface-activated nanoporous materials for treatment of waste waters and as radionuclides getters in proposed…

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…

Fracture Size Controls on Diffusion Rate Into Micro-Fractures

Lead Institution
Washington State University
Principal Investigator
Markus Flury
Project type
Large-Scale EMSL Research
Dissolution of uranium minerals within fractures has been found to be a diffusion rate limited process; thus, diffusive mass transfer in sediment micro-factures significantly affects the fate and…

GC-MS Analysis of Alkaline Cellulose Degradation Products

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
John Cort
Project type
Exploratory Research
Degradation of cellulose and other polysaccharides in alkaline conditions and at elevated temperatures yields mixtures of compounds containing carboxylic acid and/or alcohol functional groups. These…

Kinetics of Polyphosphate Decomposition in Heterogeneous Environments

Lead Institution
Pacific Northwest National Laboratory
Principal Investigator
Bruce McNamara
Project type
Capability Research
These experiments will investigate the hydrolysis kinetics of selected long-chain polyphosphate [Na3(PO4)n] compounds. The catalytic effects of impurity metal ions and contact with heterogeneous…