Reactivity heterogeneity is expressed in terms of distributions of flux over cumulative time of exposure of the solution to reactive surface area, termed here 'cumulative reactivity'.
There is a corresponding log conductivity and reactive surface area subpopulations within each facies at each scale of sedimentary architecture.
Ensembles of 100 physically heterogeneous realizations were simulated for three geochemical conditions: 1) spatially homogeneous reactive mineral surface area, 2) reactive surface area positively correlated to hydraulic heterogeneity, and 3) reactive surface area negatively correlated to hydraulic heterogeneity.
In turn, solid volume changes could reduce permeability and reactive surface area, and/or lead to host rock deformation, via fracture and frictional sliding or viscous flow.
These model estimates do not include the effects of precipitation kinetics or changes in permeability and reactive surface area due to secondary mineral precipitation.
Large forces of adhesion were observed upon retraction and are likely a function of the large amount of reactive surface area available on a tipless cantilever with no attached cell.
Finally, facies-based porosity and reactive surface area variations were shown to affect aqueous uranium concentration distributions with localized effects of the fine lithofacies having the largest impact on U VI) surface complexation.
The (1) the reaction order, (2) the rate coefficient and (3) the change in specific reactive surface area over time are the three parameters required to develop reactive transport models of mineral precipitation in a geothermal power plant.
A quantitative model for gas-solid reactions has been used in order to analyze the effect of percolation on the evolution of the overall particle properties (particle size, overall porosity and reactive surface area) during gasification/combustion reactions.
The Simons' staining technique has been used for measuring biomass accessibility/ reactive surface area and has shown success in estimating a given pretreated substrate susceptibility to hydrolysis by cellulases [ 26, 27].
The intrinsic chemical reactivity of the char surface is assessed by the reactive surface area (RSA).
