Applications / Building and Construction / Geomembranes / Protecting the environment

Building and Construction

Use energy more efficiently. Protect living spaces against radon and other gases. Protect the environment against leakage and emissions. EVAL™ barrier adds function throughout the construction site.

Protecting the environment against VOCs and greenhouse gases


What are VOCs?

Volatile Organic Compounds (or VOCs) are naturally occuring and man-made chemical compounds, commonly defined as those with boiling points under 482°F (250°C). Because of their low boiling points, they tend to evaporate easily from their solid or liquid form into the surrouding air, ground or water.

Some VOCs are dangerous to human health, but may not be immediately toxic or even easily measureable. The danger comes from accumulation over time, as the compounds enter the body typically via the air or though contaminated water.

 

The protective function of Geomembranes

To protect the soil and the underlying ground water from contamination by chemicals and heavy metals, plastic membranes are commonly used for landfill, agricultural and industrial sites.  These containment liners are commonly made from PP, PE or PVC.

Such membranes can provide effective barriers against liquids and heavy metals. However, they are usually not very effective barriers against greenhouse gases like CO2 (carbon dioxide), CH4 (methane) and VOCs like H2S (hydrogen sulfide), BTEX (benzene, toluene, ethylbenzene and xylene), TCE (trichoroethylene) and PCE (tetrachloroethylene).

monolayer membraneEVAL membrane

monolayer membrane legend Monolayer plastic membrane eval membrane legend Plastic membrane with EVAL™ barrier

EVAL geomembranes

Improving Geomembrane performance with EVAL™

By adding a layer of EVAL™ to select geomembrane structures, the barrier properties improve dramatically, increasing the amount of environmental protection. Using barrier geomembranes with EVAL™also as top liners helps block VOC emmission into the atmosphere as well as into the surrounding soil and groundwater.