Nonlocal reactive transport in heterogeneous dual-porosity media with rate-limited sorption and interregional mass diffusion
نویسندگان
چکیده
منابع مشابه
Contaminant transport in dual-porosity media with dissolved organic matter and bacteria present as mobile colloids.
In riverbank filtration, contaminant transport is affected by colloidal particles such as dissolved organic matter (DOM) and bacterial particles. In addition, the subsurface heterogeneity influences the behavior of contaminant transport in riverbank filtration. A mathematical model is developed to describe the contaminant transport in dual-porosity media in the presence of DOM and bacteria as m...
متن کاملThe effect of local-scale physical heterogeneity and nonlinear, rate-limited sorption/desorption on contaminant transport in porous media.
Nonideal transport of contaminants in porous media has often been observed in laboratory characterization studies. It has long been recognized that multiple processes associated with both physical and chemical factors can contribute to this nonideal transport behavior. To fully understand system behavior, it is important to determine the relative contributions of these multiple factors when con...
متن کاملStochastic analysis of solute transport in heterogeneous, dual-permeability media
[1] A Eulerian perturbation method is applied to study the influence of medium heterogeneity on nonreactive chemical transport in a saturated, fractured porous medium under steady state flow conditions. A dual-permeability model is used to describe the flow and solute transport in the fractured medium [Gerke and van Genuchten, 1993a, 1993b]. The model involves two overlaying continua at the mac...
متن کاملMineral precipitation-induced porosity reduction and its effect on transport parameters in diffusion-controlled porous media
BACKGROUND In geochemically perturbed systems where porewater and mineral assemblages are unequilibrated the processes of mineral precipitation and dissolution may change important transport properties such as porosity and pore diffusion coefficients. These reactions might alter the sealing capabilities of the rock by complete pore-scale precipitation (cementation) of the system or by opening n...
متن کاملOn Diffusion in Heterogeneous Media
Diffusion in heterogeneous solid media has been investigated for over forty years. However, the derived equations for bulk (or effective) diffusivity used similarity argument between diffusion and other physical properties such as electrical and thermal conductivity, and hence either implicitly or explicitly assumed that the concentrations are continuous across phase boundaries. That is, these ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Water Resources Research
سال: 2001
ISSN: 0043-1397
DOI: 10.1029/2000wr900327