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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Journal ArticleDOI
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
Solute Transport Processes in a Highly Permeable Fault Zone of Lindau Fractured Rock Test Site (Germany)
TL;DR: The results of field tracer experiments performed in the Lindau fractured rock test site (southern Black Forest, Germany) and subsequent modeling are presented in this article, where a series of tracers experiments using deuterium and dye tracers were performed over varying distances and under different testing procedures, resulting in different flow field conditions.
Journal ArticleDOI
A controlled field experiment on groundwater contamination by a multicomponent DNAPL: dissolved-plume retardation
TL;DR: Solute and co-solute concentration effects have heretofore received little attention, but may have wide significance in aquifers contaminated by point-source pollutants because many plumes contain mixed solutes over wide concentration ranges in strata that are likely subject to nonlinear sorption.
Journal ArticleDOI
Non-linear chlorinated-solvent sorption in four aquitards
TL;DR: Perchloroethene (PCE) was determined over a wide concentration range (∼ 1-90,000 μg L−1, or ∼ 0.0007-60% of solubility) for four diverse natural clay-rich aquitards using a batch method as mentioned in this paper.
Journal ArticleDOI
Effect of sorption intensities on dispersivity and macro-dispersion coefficient in a single fracture with matrix diffusion
TL;DR: In this paper, a numerical model has been developed that couples matrix diffusion and nonlinear sorption at the scale of a single fracture using the dual-porosity concept, and the influence of sorption intensities on dispersivity and macro-dispersion coefficient is investigated using a method of spatial moments.
Journal ArticleDOI
Modeling plume behavior for nonlinearly sorbing solutes in saturated homogeneous porous media
TL;DR: In this paper, a particle tracking random walk method is used to model the transport of a sorbing solute in a two-dimensional steady and uniform flow field using particle tracking.
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