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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Journal ArticleDOI
Modeling transport in a single crack by the dual-porosity concept with a boundary layer at the interface
R. Wallach,Jean-Yves Parlange +1 more
TL;DR: In this paper, a model for contaminant transport along a discrete fracture in a porous rock matrix is developed and solved analytically, where the dynamics of solute exchange between the matrix and a single crack and its effect on solute transport within the crack and the chemical distribution with time at any depth.
Journal ArticleDOI
Field tracer experiment in a low permeability fractured medium: results from El Berrocal site
M. D'Alessandro,F. Mousty,Giovanni Bidoglio,Jordi Guimerà,I. Benet,Xavier Sanchez-Vila,M. Garcia Gutierrez,A. Yllera de Llano +7 more
TL;DR: In this paper, three conservative tracers were injected into two packed-off sections of the same well, 69 m deep in a granite formation, and recovered by pumping from an isolated section of a second borehole, 46 m deep, 14 m apart.
Journal ArticleDOI
Radioactive Tracer Study Performed in a Dipole Geometry in a Highly Conductive Fracture Zone
TL;DR: In this paper, a radioactive tracer experiment has been performed in a highly conductive fracture zone, using a dipole geometry, where anions (131I− and 82Br−) and complexed metal ions have been injected and their properties as non-sorbing tracers were evaluated.
A comparision of in situ radionuclide migration studies in the Studsvik area and laboratory measurements.
Ove Landström,Carl Erik Klockars,O Persson,Karin Andersson,Börje Torstenfelt,Bert Allard,Sven Åke Larson,Eva-Lena Tullborg +7 more
Sorbing Tracers - A Potential Tool for Determining Effective Heat Transfer Area in Hot Fractured Rock Systems
Chao Shan,Karsten Pruess +1 more
TL;DR: In this article, the authors developed an analytical solution to theoretically explore such a useful phenomenon, which is useful for understanding transport mechanisms, verifying numerical codes, and for identifying chemicals with appropriate sorption properties as tracers for the characterization of a fractured reservoir.
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