Upscaling Sorption/Desorption Processes in Reactive Transport Models To Describe Metal/Radionuclide Transport: A Critical Review

2010 ◽  
Vol 44 (21) ◽  
pp. 7996-8007 ◽  
Author(s):  
Andrew W. Miller ◽  
Derrick R. Rodriguez ◽  
Bruce D. Honeyman
Keyword(s):  
Critical Review ◽  
Reactive Transport ◽  
Radionuclide Transport ◽  
Transport Models

scholarly journals Timescales for the development of methanogenesis and free gas layers in recently-deposited sediments of Arkona Basin (Baltic Sea)

2012 ◽  
Vol 9 (5) ◽  
pp. 1915-1933 ◽  
Author(s):  
J. M. Mogollón ◽  
A. W. Dale ◽  
H. Fossing ◽  
P. Regnier
Keyword(s):  
Organic Matter ◽  
Baltic Sea ◽  
Reactive Transport ◽  
Reaction Pathway ◽  
Organic Matter Degradation ◽  
Muddy Sediment ◽  
Transport Models ◽  
Methane Gas ◽  
Geochemical Profiles ◽  
Arkona Basin

Abstract. Arkona Basin (southwestern Baltic Sea) is a seasonally-hypoxic basin characterized by the presence of free methane gas in its youngest organic-rich muddy stratum. Through the use of reactive transport models, this study tracks the development of the methane geochemistry in Arkona Basin as this muddy sediment became deposited during the last 8 kyr. Four cores are modeled each pertaining to a unique geochemical scenario according to their respective contemporary geochemical profiles. Ultimately the thickness of the muddy sediment and the flux of particulate organic carbon are crucial in determining the advent of both methanogenesis and free methane gas, the timescales over which methanogenesis takes over as a dominant reaction pathway for organic matter degradation, and the timescales required for free methane gas to form.

scholarly journals Validating Reactive Transport Models of CO2-brine-Rock Reactions in Caprocks Using Observations from a Natural CO2 Reservoir

2017 ◽  
Vol 114 ◽  
pp. 4902-4916 ◽  
Author(s):  
Niko Kampman ◽  
Pieter Bertier ◽  
Andreas Busch ◽  
Jeroen Snippe ◽  
Jon Harrington ◽  
...  
Keyword(s):  
Reactive Transport ◽  
Transport Models

scholarly journals Elements Present in Leach Solutions from Unsaturated Spent Fuel Tests

1993 ◽  
Vol 333 ◽  
Author(s):  
P. A. Finn ◽  
J. K. Bates ◽  
J. C. Hoh ◽  
J. W. Emery ◽  
L D. Hafenrichter ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Radionuclide Transport ◽  
Spent Fuel ◽  
Major Fraction ◽  
Transport Models ◽  
Preliminary Results ◽  
J 13

ABSTRACTPreliminary results for the composition of the leachate from unsaturated tests at 90°C with spent fuel for two successive periods of ~60 days each with pretreated J-13 groundwater are reported. The pH of the leachate solutions ranged from 4 to 7. The americium concentration was 104 to 105 greater than that reported for saturated spent fuel tests in which the leachate pH was 8. The major fraction of material in the leachate was present as colloids containing both americium and curium. The presence of actinides in a form not currently directly included in repository radionuclide transport models provides information that can be used in spent fuel reaction modeling, the performance assessment of the repository and the design of the engineering barrier system.

Sign in / Sign up

Export Citation Format

Share Document