Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"Retardation factor"”.
-
Solute Transport and Biodegradation Characteristics for Models of Enhanced Subsurface Bioremediation
… the depth-averaged groundwater flow velocity and retardation factor of the substrate. The microbial kinetic parameters, initial biomass concentration, dispersion parameters, and the spatial variation of the flow velocity and the retardation factor do not significantly affect the long-term …
-
Modeling Fate and Transport of Nitrogen and Phosphorus in Crop Fields Under Tropical Conditions
… of temperature; and inclusion of a nitrate retardation factor (Ncrit) and pH in the calculation of N transformation and movement. The adapted model, called TROPGLEAMS, was evaluated through model verification, application, and sensitivity analysis. Model verification comprised a mass balance …
-
Solid state and nuclear results from Mössbauer studies with I[superscript 129]
… has been determined. This value corresponds to a retardation factor of 140 when compared to the single particle Ml estimate. An extrapolation of the absorption line width to zero thickness gives a value of 20 nsec for the mean life. This should be considered as a lower limit because of the …
-
Adjustment of DRASTIC vulnerability index to assess groundwater vulnerability for nitrate pollution using the advection diffusion cell
… The ETI concept was utilized to assess nitrate retardation in different soils using the Advection-Diffusion (AD) cell. The convective-dispersive solute transport equation has been solved analytically to calibrate the results of the Advection-Diffusion cell, and high agreement has been shown. The …
-
Efeito da velocidade de escoamento da solução e do comprimento da coluna de solo nos parâmetros de transporte de solutos em solos argiloso e arenoso
A eficácia dos modelos matemáticos desenvolvidos para descrever o transporte de solutos no solo depende do grau de confiabilidade dos valores dos parâmetros de transporte. Apesar dos trabalhos de determinação destes parâmetros utilizarem a mesma equação de transporte, algumas condições …