Effects of clay nanoparticles added to the bonab landfill soil to reduce the permeability and control of leachate

Solid waste excretion is one of the problems of urbanization. The last element obligated the waste management system and the final destiny all wastes should be discarded is bury. Engineering buried sanitary landfill method of waste disposal in land، is to prevent harm to the environment. Landfills in the case of non-compliance with engineering principles، the ability to create very high pollution in the environment، groundwater، surface water and soil. that is have concerned authorities and the public. One of the major landfill pollution، the infecting is caused by the movement of leachate and groundwater contamination. In the design and management of landfills، leachate control، body construction، drainage channels design، is one of the most important factors. Control and reduce the permeability of the landfill is critical environmental factors. To reduce the permeability of the landfill body used geomembranes، clay layers and other impermeable materials. In this study، the effects of added nanoparticles of clay to landfill body soil to reduced permeability has been investigated. This study located in the Bonab city of East Azarbaijan. The results show that adding 3% to 9% clay nanoparticles caused a significant reduction in soil permeability of landfill body. So that the soil permeability reduced from 3. 25×10-6 to 4. 22× 10-7 centimeter per second in normal leachate conditions. In acidic leachate conditions soil permeability reduced from 3. 83×10-6 to 7. 20× 10-7 centimeter per second and in alkaline or basic leachate conditions from 2. 76×10-6 to 2. 02× 10-7 centimeter per second. Thus، the addition of clay and clay nanoparticles significantly reduce the permeability of landfill body to passing leachate.