• Publications
  • Influence
Uranium removal from groundwater via in situ biostimulation: Field-scale modeling of transport and biological processes.
During 2002 and 2003, bioremediation experiments in the unconfined aquifer of the Old Rifle UMTRA field site in western Colorado provided evidence for the immobilization of hexavalent uranium inExpand
  • 149
  • 7
Removal of As, Mn, Mo, Se, U, V and Zn from groundwater by zero-valent iron in a passive treatment cell: reaction progress modeling.
Three treatment cells were operated at a site near Durango, CO. One treatment cell operated for more than 3 years. The treatment cells were used for passive removal of contamination from groundwaterExpand
  • 144
  • 6
Extraction of uranium and molybdenum from aqueous solutions: a survey of industrial materials for use in chemical barriers for uranium mill tailings remediation
Laboratory experiments were performed to simulate the interaction of contaminated pore fluids with a variety of industrial materials. The objective was to evaluate the materials for use in a chemicalExpand
  • 83
  • 6
Uranium precipitation in a permeable reactive barrier by progressive irreversible dissolution of zerovalent iron.
A permeable reactive barrier (PRB) containing zerovalent iron [Fe(O)] was installed at a former uranium milling site in Monticello, UT. A large-scale column experiment was conducted at the site toExpand
  • 122
  • 5
Multicomponent reactive transport modeling of uranium bioremediation field experiments
Abstract A reaction network integrating abiotic and microbially mediated reactions has been developed to simulate biostimulation field experiments at a former Uranium Mill Tailings Remedial ActionExpand
  • 84
  • 5
Naturally occurring contamination in the Mancos Shale.
Some uranium mill tailings disposal cells were constructed on dark-gray shale of the Upper Cretaceous Mancos Shale. Shale of this formation contains contaminants similar to those in mill tailings. ToExpand
  • 37
  • 4
Early breakthrough of molybdenum and uranium in a permeable reactive barrier.
A permeable reactive barrier (PRB) using zerovalent iron (ZVI) was installed at a site near Cañon City, CO, to treat molybdenum (Mo) and uranium (U) in groundwater. The PRB initially decreased MoExpand
  • 66
  • 3
Performance evaluation of a permeable reactive barrier using reaction products as tracers.
  • S. Morrison
  • Medicine, Chemistry
  • Environmental science & technology
  • 11 April 2003
A method incorporating laboratory analysis of constituents that formed as reaction products was developed and used to determine the flux of groundwater through a zerovalent iron-based permeableExpand
  • 50
  • 3
The effects of offering a range of forage and concentrate supplements on milk production and dry matter intake of grazing dairy cows
An experiment was undertaken to examine the effect of supplement type on herbage intake, total dry matter (DM) intake, animal performance and nitrogen utilization with grazing dairy cows. Twenty-fourExpand
  • 22
  • 3
Coupled reaction/transport modeling of a chemical barrier for controlling uranium(VI) contamination in groundwater
Abstract Adsorption of uranium onto amorphous ferric oxyhydroxide can be used for in situ containment of uranium(VI) present in mill tailings and for prevention of potential groundwaterExpand
  • 43
  • 2