The new applications for carbon nanotubes (CNTs) in various fields and consequently their greater production volume have increased their potential release to the environment. Landfills are one of the major locations where carbon nanotubes are expected to be disposed and it is important to ensure that they can limit the release of CNTs. Diffusion of multiwall carbon nanotubes (MWCNTs) dispersed ...

There are some artificial and natural materials on foundation of heap leaching structures. Geomembrane liner is the most important artificial isolated layer of these structures. The thickness of this layer is about 1 to 2 mm. Foundation overall settlement of such structures changes the primary length of the geomembrane layer. If the strain of geomembrane is more than allowable one, the layer wi...

An experimental testing program was conducted to quantify leakage through a geomembrane liner system when subjected to high hydraulic heads. Leakage through geomembranes is mainly due to the presence of defects, which may occur during installation and operation. Previous studies focused on leakage through landfill liners (i.e., low hydraulic heads) have led to analytical models and simplified e...

iran has limited water resources that require preservation and reducing water loss from reservoirs, especially in arid and semi arid regions. there are a number of methods available for to control water loss from reservoirs and canals. concrete linings in water reservoirs and ponds are durable, but their efficiency is limited. geomembrane sheets are another method of controlling leakage from wa...

landfill is the major method of solid waste disposal in developing countries. to protect soil andgroundwater from contamination, anti-seepage systems have to be installed in landfills. however, during theconstruction of anti-seepage system, many factors can result in holes in geomembrane liners. for the purpose of improving construction quality, the construction company needs to find the leaks ...

Barrier systems are designed to control contaminant migration. Geomembranes are commonly used as part of a composite liner in landfill cover, base liner systems and sometimes vapour barriers. In landfill applications, the primary function of the geomembrane liner is to control contaminant transport from the leachate (dissolved phase) and landfill gas (vapour phase) out of the landfill thus mini...

In mining, due to the high environmental responsibility and load supported, geomembrane-soil interface must guarantee parameters (such as friction angle adhesion) that contribute stability of barrier system. The use a textured High-Density Polyethene (HDPE) geomembrane, known structured guarantees uniformity in asperity height manufacturing process (flat-die). present work presents results dire...

The interfacial friction performance of the liner system has an important influence on overall stability modern landfills, but interface using conventional geomembranes may have problems such as shear failure and slip along system. Accordingly, concept a ribbed geomembrane was proposed. Based laboratory model tests, variation laws p–s curves additional stress sand were studied under different v...

This paper presents the construction of multi-layer geosynthetic containment systems as part improvements to a stormwater management system mitigate groundwater contamination at coal combustion residual landfill in southeastern USA. The consisted lining perimeter ditch and sedimentation pond contain ash sediments minimize infiltration into groundwater. A composite liner comprised HydroTurf synt...