Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Michael K. Richmann"'
Autor:
Michael K. Richmann, Juliet S. Swanson, Floyd E. Stanley, Adrianne Navarrette, Cindi Hazelton
Publikováno v:
Chemosphere. 280
Spores of a Bacillus sp., isolated from radioactive waste, were tested for their ability to influence the fate and transport of neodymium (Nd3+) under high salt conditions expected at the Waste Isolation Pilot Plant (WIPP) nuclear waste repository. S
Autor:
Hilary P. Emerson, Juliet S. Swanson, Michael K. Richmann, Timothy M. Dittrich, Frances Zengotita, Donald T. Reed, Floyd E. Stanley
Publikováno v:
Chemosphere. 235
In subsurface repositories, active bacterial populations may directly influence the fate and transport of radionuclides including in salt repository systems like the Waste Isolation Pilot Plant in Carlsbad, NM. This research quantified the potential
Autor:
Yelena Katsenovich, Donald T. Reed, Frances Zengotita, Hilary P. Emerson, Timothy M. Dittrich, Michael K. Richmann
Publikováno v:
Journal of environmental radioactivity.
The results presented in this paper highlight the complexity of adsorption and incorporation processes of Nd with dolomite and significantly improve upon previous work investigating trivalent actinide and lanthanide interactions with dolomite. Both b
Autor:
Katja Hinz, Thomas Rabung, Marcus Altmaier, Evgeny V. Alekseev, Dieter Schild, Xavier Gaona, Michael K. Richmann, Donald T. Reed, Horst Geckeis
Publikováno v:
New Journal of Chemistry. 39:849-859
The interaction of lanthanides and trivalent actinides with borate in dilute to concentrated alkaline NaCl, MgCl2 and CaCl2 solutions was investigated at 22 ± 2 °C by a comprehensive series of solubility experiments with Nd(OH)3(am), and complement
Autor:
Donald T. Reed, Jeremy B. Fein, Juliet S. Swanson, Jennifer E. S. Szymanowski, Michael K. Richmann, David A Ams
Publikováno v:
Geochimica et Cosmochimica Acta. 110:45-57
The mobility of neptunium (V) in subsurface high ionic strength aqueous systems may be strongly influenced by adsorption to the cell wall of the halophilic bacteria Chromohalobacter sp. This study is the first to evaluate the adsorption of neptunium
Publikováno v:
Radiochimica Acta. 101:391-398
The solubility of uranium(VI) was determined in WIPP-relevant brines as a function of pCH+and ionic strength, in the absence of carbonate. Carbonate concentration was below 2 × 105 M, measured using the gas chromatography method. In the absence of c
Publikováno v:
ract. 98:577-582
The potential importance of tetraborate complexation on lanthanide(III) and actinide(III) solubility is recognized in the literature but a systematic study of f-element complexation has not been performed. In neodymium solubility studies in WIPP brin
Autor:
Randhir P. Deo, Michael K. Richmann, Donald T. Reed, Bruce E. Rittmann, Sarah E. Pepper, Geof Smith
Publikováno v:
Journal of Alloys and Compounds. :376-382
Bio-mediated reduction of multivalent actinide contaminants plays an important role in their fate and transport in the subsurface. To initiate the process of extending recent progress in uranium biogeochemistry to plutonium, a side-by-side comparison
Publikováno v:
Journal of Alloys and Compounds. :506-511
A general status of the Waste Isolation Pilot Plant (WIPP), as it relates to plutonium chemistry and inventory, is given. We also report on the results of two redox-invariant studies, Nd3+ and UO22+, that are being investigated as analogs for Pu(III)
Publikováno v:
Journal of Nuclear Materials. 297:303-312
A sodalite/glass ceramic waste form is being developed to immobilize highly radioactive nuclear wastes in chloride form, as part of an electrochemical cleanup process. Two types of simulated waste forms were studied: where the plutonium was alone in