Clayey material that possesses semipermeable membrane property may experience osmotic consolidation in presence of an osmotic gradient. In this paper, a fully coupled H-M-C model has been presented to study solute transport under the combined influence of mechanical and osmotic consolidations and vice versa. The model has been tested against the results of relevant importance and good agreements have been achieved. The model has been applied to investigate long-term solute transport behavior and consequent deformations/settlements in a natural clay liner. The results suggest, at early stages, solute transport is dominated by mechanical consolidation; however, physicochemical interaction associated with osmotic processes and osmotic consolidation dominates in the long term. Osmotic settlement shows decreasing trend past the maximum deformation of the clay liner indicating reduction of osmotic gradient across the semipermeable membrane. It is also evident that overall soil consolidation and transport of solute are affected by the concentration of the solute at the source or the injection boundary.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11356-018-3532-7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Coupled model for one-dimensional large-strain nonlinear consolidation and contaminant transport in underlying clay liner of a dredged sludge dumping site considering different initial effective stress distributions.
Sci Total Environ
January 2025
Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, PR China. Electronic address:
To study the contaminant transport behavior in the underlying clay liner of a dredged sludge dumping site, a one-dimensional large strain nonlinear consolidation and contaminant transport coupled model is established, and the corresponding numerical solutions for the proposed coupled model is obtained. The numerical results are compared and investigated with the existing theoretical model to verify the correctness of the coupled model. Furthermore, the effects of dredged sludge landfill method and initial effective stress distribution on the contaminant transport behavior in the underlying clay liner and the breakthrough time of the underlying clay liner are investigated.
View Article and Find Full Text PDFThe strength and hydraulic conductivity characteristics of sewage sludge ash and natural soil mixtures - a sustainable alternate landfill liner material.
Environ Technol
November 2024
College of Civil Engineering & Architecture, Wuhan Polytechnic University, Wuhan, People's Republic of China.
This paper examines the feasibility of the natural soil and sewage sludge ash (SSA) mixtures, which satisfy the criteria to be used as landfill liners. The effect of SSA content on hydraulic conductivity and strength characteristics of natural soil and SSA mixtures has been investigated through a series of laboratory tests. The results demonstrate that mixtures exhibit an increase in both hydrodynamic diffusion coefficient and strength with the increasing SSA content.
View Article and Find Full Text PDFHeat mitigation in basal compacted clay liners in municipal solid waste landfills.
Environ Sci Pollut Res Int
November 2024
Institute of Energy Infrastructure (IEI), Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000, Kajang, Selangor, Malaysia.
In municipal solid waste (MSW) landfills, biodegradation of the organic MSW fraction results in elevated waste and basal liner temperatures which have the potential to cause the clay component of the basal liner to experience severe moisture loss over time and eventually undergo desiccation cracking. Cracking of the basal liner's clay component would result in an uncontrolled release of contaminants into the surrounding environment and ultimately give rise to a variety of major environmental concerns. Accordingly, this study examined the variation of temperature-moisture profiles along the depth of a compacted clay liner (CCL) exposed to different constant elevated waste temperatures (CETs) in the absence and presence of two heat reduction techniques, respectively.
View Article and Find Full Text PDFMechanical Properties of Clay-Reinforced Polyamide 6 Nanocomposite Liner Materials of Type IV Hydrogen Storage Vessels.
Nanomaterials (Basel)
August 2024
Department of Applied Sustainability, Széchenyi István University, Egyetem tér 1, 9026 Győr, Hungary.
This study focuses on polyamide 6/organo-modified montmorillonite (PA6/OMMT) nanocomposites as potential liner materials, given the growing interest in enhancing the performance of type IV composite overwrapped hydrogen storage pressure vessels. The mechanical properties of PA6/OMMT composites with varying filler concentrations were investigated across a temperature range relevant to hydrogen storage conditions (-40 °C to +85 °C). Liner collapse, a critical issue caused by rapid gas discharge, was analyzed using an Ishikawa diagram to identify external and internal factors.
View Article and Find Full Text PDFImproving landfill liner performance with bentonite-slag blend permeated with ammonia for a Municipal solid waste landfill.
J Environ Manage
September 2024
Department of Civil Engineering, National Institute of Technology Karnataka, Srinivasnagar P.O, Mangalore, Karnataka 575 025, India. Electronic address:
Leachate emanating from landfills contains ammonia which may cause serious health effects on living things. An effectively designed clay barrier should not allow the contaminant to infiltrate the soil and groundwater systems. The utilization of certain industrial by-products in engineered landfill barriers, not only reduces the need for conventional liner materials but also helps in sustainable waste management.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!