Christopher Fuller (Former Employee)
Science and Products
Filter Total Items: 85
Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation
X-ray absorption near-edge spectroscopy (XANES) analysis of sorption complexes has the advantages of high sensitivity (10- to 20-fold greater than extended X-ray absorption fine structure [EXAFS] analysis) and relative ease and speed of data collection (because of the short k-space range). It is thus a potentially powerful tool for characterization of environmentally significant surface...
Authors
G.A. Waychunas, C. C. Fuller, J.A. Davis, J.J. Rehr
Toxic substances in surface waters and sediments: A study to assess the effects of arsenic-contaminated alluvial sediment in Whitewood Creek, South Dakota Toxic substances in surface waters and sediments: A study to assess the effects of arsenic-contaminated alluvial sediment in Whitewood Creek, South Dakota
Field measurements and bioassay experiments were done to investigate the effects of arsenic and phosphorus interactions on sorption of these solutes by the benthic flora (periphyton and submerged macrophytes) in Whitewood Creek, a stream in western South Dakota. Short-term (24-hour) sorption experiments were used to determine arsenic transport characteristics for algae (first-order rate...
Authors
James S. Kuwabara, Christopher C. Fuller
Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration
Uranium binding to bone charcoal and bone meal apatite materials was investigated using U LIII-edge EXAFS spectroscopy and synchrotron source XRD measurements of laboratory batch preparations in the absence and presence of dissolved carbonate. Pelletized bone char apatite recovered from a permeable reactive barrier (PRB) at Fry Canyon, UT, was also studied. EXAFS analyses indicate that U...
Authors
C. C. Fuller, J.R. Bargar, J.A. Davis
Mechanisms of uranium interactions with hydroxyapatite: Implications for groundwater remediation Mechanisms of uranium interactions with hydroxyapatite: Implications for groundwater remediation
The speciation of U(VI) sorbed to synthetic hydroxyapatite was investigated using a combination of U LIII-edge XAS, synchrotron XRD, batch uptake measurements, and SEM-EDS. The mechanisms of U(VI) removal by apatite were determined in order to evaluate the feasibility of apatite-based in-situ permeable reactive barriers (PRBs). In batch U(VI) uptake experiments with synthetic...
Authors
C. C. Fuller, J.R. Bargar, J.A. Davis, M.J. Piana
Processes of nickel and cobalt uptake by a manganese oxide forming sediment in Pinal Creek, Globe mining district, Arizona Processes of nickel and cobalt uptake by a manganese oxide forming sediment in Pinal Creek, Globe mining district, Arizona
A series of column experiments was conducted using manganese oxide coated sediments collected from the hyporheic zone in Pinal Creek (AZ), a metal-contaminated stream, to study the uptake and retention of Mn, Ni, and Co. Experimental variables included the absence (abiotic) and presence (biotic) of active Mn-oxidizing bacteria, the absence and presence of dissolved Mn, and sediment...
Authors
J.T. Kay, M.H. Conklin, C. C. Fuller, P. A. O’Day
Potential artifacts in interpretation of differential breakthrough of colloids and dissolved tracers in the context of transport in a zero-valent iron permeable reactive barrier Potential artifacts in interpretation of differential breakthrough of colloids and dissolved tracers in the context of transport in a zero-valent iron permeable reactive barrier
Many published studies have used visual comparison of the timing of peak breakthrough of colloids versus conservative dissolved tracers (hereafter referred to as dissolved tracers or tracers) in subsurface media to determine whether they are advected differently, and to elucidate the mechanisms of differential advection. This purely visual approach of determining differential advection...
Authors
P. Zhang, W.P. Johnson, M.J. Piana, C. C. Fuller, D. L. Naftz
Science and Products
Filter Total Items: 85
Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation
X-ray absorption near-edge spectroscopy (XANES) analysis of sorption complexes has the advantages of high sensitivity (10- to 20-fold greater than extended X-ray absorption fine structure [EXAFS] analysis) and relative ease and speed of data collection (because of the short k-space range). It is thus a potentially powerful tool for characterization of environmentally significant surface...
Authors
G.A. Waychunas, C. C. Fuller, J.A. Davis, J.J. Rehr
Toxic substances in surface waters and sediments: A study to assess the effects of arsenic-contaminated alluvial sediment in Whitewood Creek, South Dakota Toxic substances in surface waters and sediments: A study to assess the effects of arsenic-contaminated alluvial sediment in Whitewood Creek, South Dakota
Field measurements and bioassay experiments were done to investigate the effects of arsenic and phosphorus interactions on sorption of these solutes by the benthic flora (periphyton and submerged macrophytes) in Whitewood Creek, a stream in western South Dakota. Short-term (24-hour) sorption experiments were used to determine arsenic transport characteristics for algae (first-order rate...
Authors
James S. Kuwabara, Christopher C. Fuller
Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration
Uranium binding to bone charcoal and bone meal apatite materials was investigated using U LIII-edge EXAFS spectroscopy and synchrotron source XRD measurements of laboratory batch preparations in the absence and presence of dissolved carbonate. Pelletized bone char apatite recovered from a permeable reactive barrier (PRB) at Fry Canyon, UT, was also studied. EXAFS analyses indicate that U...
Authors
C. C. Fuller, J.R. Bargar, J.A. Davis
Mechanisms of uranium interactions with hydroxyapatite: Implications for groundwater remediation Mechanisms of uranium interactions with hydroxyapatite: Implications for groundwater remediation
The speciation of U(VI) sorbed to synthetic hydroxyapatite was investigated using a combination of U LIII-edge XAS, synchrotron XRD, batch uptake measurements, and SEM-EDS. The mechanisms of U(VI) removal by apatite were determined in order to evaluate the feasibility of apatite-based in-situ permeable reactive barriers (PRBs). In batch U(VI) uptake experiments with synthetic...
Authors
C. C. Fuller, J.R. Bargar, J.A. Davis, M.J. Piana
Processes of nickel and cobalt uptake by a manganese oxide forming sediment in Pinal Creek, Globe mining district, Arizona Processes of nickel and cobalt uptake by a manganese oxide forming sediment in Pinal Creek, Globe mining district, Arizona
A series of column experiments was conducted using manganese oxide coated sediments collected from the hyporheic zone in Pinal Creek (AZ), a metal-contaminated stream, to study the uptake and retention of Mn, Ni, and Co. Experimental variables included the absence (abiotic) and presence (biotic) of active Mn-oxidizing bacteria, the absence and presence of dissolved Mn, and sediment...
Authors
J.T. Kay, M.H. Conklin, C. C. Fuller, P. A. O’Day
Potential artifacts in interpretation of differential breakthrough of colloids and dissolved tracers in the context of transport in a zero-valent iron permeable reactive barrier Potential artifacts in interpretation of differential breakthrough of colloids and dissolved tracers in the context of transport in a zero-valent iron permeable reactive barrier
Many published studies have used visual comparison of the timing of peak breakthrough of colloids versus conservative dissolved tracers (hereafter referred to as dissolved tracers or tracers) in subsurface media to determine whether they are advected differently, and to elucidate the mechanisms of differential advection. This purely visual approach of determining differential advection...
Authors
P. Zhang, W.P. Johnson, M.J. Piana, C. C. Fuller, D. L. Naftz