Geomembrane for Landfill Site

Geomembranes transcend their role as simple "impermeable liners."  By integrating their physicochemical properties with engineering design, they serve as multifunctional solution cores in modern environmental engineering, hydraulic infrastructure, and resource conservation.  

I. Core Functions of Geomembranes：

1. Impermeable Barrier

• Principle: Utilizes the high-density structure of polymer materials (e.g., HDPE, LLDPE, PVC) to prevent the migration of liquids, gases, or contaminants.

• Applications:

• Landfills: Isolate leachate to protect groundwater and soil.

• Tailings ponds: Block acidic wastewater from contaminating surrounding environments.

• Reservoirs/Artificial lakes: Minimize water seepage and improve water resource efficiency.

• Technical Metrics: Permeability coefficient as low as $10^{-12}\text{m/s}$ (ASTM D7176), far surpassing traditional materials like clay.

2. Chemical Resistance

• Principle: Polymer materials (e.g., HDPE) exhibit inertness to acids, alkalis, salts, and organic solvents.

• Applications:

• Chemical-contaminated sites: Cover polluted soil to prevent hazardous substance diffusion.

• Oil/gas storage tank bases: Resist long-term corrosion from petroleum or chemicals.

• Case Study: HDPE geomembranes maintain stable performance for 50 years in pH 2-12 environments (EPA standards).

3. Mechanical Reinforcement

• Principle: High tensile strength (20-40 MPa) and puncture resistance (ASTM D5514) to distribute external loads.

• Applications:

• Subgrade engineering: Reduce uneven settlement and frost heave damage.

• Mining heap leaching pads: Resist puncture by sharp ore particles.

• Data: 1.5mm HDPE geomembranes withstand 300N static puncture force.

4. Ecological Protection

• Principle: Physically isolate pollution sources to minimize direct harm to ecosystems.

• Applications:

• Wetland restoration: Block industrial wastewater to protect aquatic plants.

• Saline-alkali soil remediation: Prevent salt upward migration and promote crop growth.

II. Specialized Functions

1. Thermal Regulation

• Black geomembranes: Absorb solar radiation to raise soil/water temperature (increase winter water temperature by 2-5°C), used in aquaculture overwintering.

• White/reflective geomembranes: Reflect heat to mitigate summer high-temperature impacts on roadbeds.

2. Gas Venting

• Textured surfaces: Structured geomembranes (e.g., rough HDPE) facilitate biogas emission for landfill methane recovery systems.

3. Interface Stability

• Frictional properties: Friction angles of 25°-35° between textured geomembranes and soil enhance slope anti-sliding capacity (e.g., steep slope cover systems).

Technical Data:

Application:

The applications of geomembrane in landfill sites are primarily focused on preventing the leakage of leachate and harmful gases from the waste disposal area, protecting the surrounding environment, and ensuring the safe and effective operation of the landfill. Here are some specific applications of geomembrane in landfill sites:

1.Base Liner: Geomembrane is used as a base liner under the waste disposal area. It acts as a barrier between the waste and the underlying soil or groundwater, preventing the leachate generated from the waste from contaminating the soil or groundwater.

2.Cap/Cover System: Geomembrane can also be used as a cap or cover system over the waste disposal area. This covers the waste and prevents the emission of harmful gases, odors, and other pollutants into the atmosphere. It also protects the waste from external factors like rainwater infiltration and wind erosion.

3.Leachate Collection System: Geomembrane can be incorporated into a leachate collection system in landfill sites. It can be used to line the leachate collection channels or sumps, preventing the leakage of leachate and ensuring its effective collection and treatment.

4.Gas Collection System: Geomembrane can be a part of a gas collection system in landfill sites. It can be used to cover the waste and create a sealed environment, allowing the collection of methane and other gases generated from the waste. These gases can then be utilized as a renewable energy source or flared safely.

5.Slope Protection: Geomembrane can be used to protect the slopes of landfill sites. It can be installed on the slopes to prevent erosion, stabilize the soil, and reduce the risk of landslides or other slope failures.

In summary, geomembrane plays a crucial role in the safe and effective operation of landfill sites by preventing the leakage of leachate and harmful gases, protecting the environment, and ensuring the long-term stability of the landfill.

Packaging:

Customer's company Logo mark can be added.

Packed in woven bags.

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