Journal ArticleDOI
Influence of Sorption Intensity on Solute Mobility in a Fractured Formation
TLDR
In this paper, a numerical model is developed that couples matrix diffusion and nonlinear sorption at the scale of a single fracture using the dual-porosity concept, and the influence of both favorable and unfavorable sorption intensities on solute mobility is investigated using the method of spatial moments.Abstract:
Diffusive mass transfer between fracture and matrix accompanied with sorption significantly influences the efficiency of natural attenuation in hard rocks. While these processes have extensively been studied in a fractured formation, limited information exists on the sorption nonlinearity. For this purpose, a numerical model is developed that couples matrix diffusion and nonlinear sorption at the scale of a single fracture using the dual-porosity concept. The study is limited to a constant continuous solute source boundary condition. The influence of both favorable and unfavorable sorption intensities on solute mobility is investigated using the method of spatial moments. The differing capacities of available sorption sites between fracture surfaces at the fracture-matrix interface and the solid grain surfaces within the rock matrix result in a slower migration of solutes along the fracture, and a larger amount of diffusive mass transfer away from the high permeability fracture.read more
Citations
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Influence of dynamic coupled hydro-bio-mechanical processes on response of municipal solid waste and liner system in bioreactor landfills
TL;DR: A two-dimensional mathematical model is presented to predict the response of municipal solid waste (MSW) of conventional as well as bioreactor landfills undergoing coupled hydro-bio-mechanical processes and underscores the importance of considering the effect of coupled processes while examining the stability and integrity of the liner and cover systems.
Journal ArticleDOI
Modeling Coupled Processes in Municipal Solid Waste Landfills: An Overview with Key Engineering Challenges
TL;DR: A critical review of the previous research efforts on coupled processes is provided to help landfill engineers understand, design and operate municipal solid waste (MSW) landfills safely and efficiently as discussed by the authors.
Journal ArticleDOI
Mathematical Modeling of Groundwater Flow and Solute Transport in Saturated Fractured Rock Using a Dual-Porosity Approach
TL;DR: In this paper, an improved mathematical model is suggested that better describes fluid flow through a coupled fracture-matrix system using a dual-porosity approach, which differs from a conventional model as the fracture flow equation contains a hyperbolic term in addition to the conventional dispersive term.
Journal ArticleDOI
Two-Phase Modeling of Leachate Recirculation Using Drainage Blankets in Bioreactor Landfills
TL;DR: Results indicate that the variation in the different parameters assumed has a significant influence on the successful distribution of the moisture in a typical bioreactor landfill cell using a DB as the LRS.
Journal ArticleDOI
Slope stability of bioreactor landfills during leachate injection: Effects of unsaturated hydraulic properties of municipal solid waste
Rajiv K. Giri,Krishna R. Reddy +1 more
TL;DR: In this article, a numerical two-phase flow model was used to examine the effects of unsaturated hydraulic properties on the moisture distribution, pore fluid pressures, and the stability of a bioreactor landfill slope with horizontal trench as leachate recirculation system.
References
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TL;DR: In this article, the first part of a two-part series describing the adsorption of hydrophobic pollutants by sediments, soils, and suspended solids is presented, where the energetics of sorption reactions are discussed and models for description of equilibrium relationships are summarized.
Journal ArticleDOI
Tracer tests in a fractured dolomite: 2. Analysis of mass transfer in single‐well injection‐withdrawal tests
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Journal ArticleDOI
Impacts of heterogeneous organic matter on phenanthrene sorption: equilibrium and kinetic studies with aquifer material.
Hrissi K. Karapanagioti,Sybille Kleineidam,David A. Sabatini,Peter Grathwohl,Bertrand Ligouis +4 more
TL;DR: In this paper, the authors investigated the sorptive properties as well as the composition of organic matter in different subsamples (mainly grain size fractions) of the Canadian River Alluvium (CRA).
Journal ArticleDOI
Mathematical modeling of tracer behavior in short‐term experiments in fissured rocks
Piotr Maloszewski,Andrzej Zuber +1 more
TL;DR: In this article, a chemical model for a single fissure in a porous matrix is coupled with a transporters model allowing for both an instantaneous equilibrium governed by a linear adsorption isotherm and a nonequilibrium kinetic reaction of the first order.
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Transport of reactive tracers in rock fractures
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