Two-layer geosynthetic clay barrier with a separate sorption layer manufactured by the two-layer dosing method and a method for manufacturing a two-layer geosynthetic clay barrier with independent two-layer dosing of mineral layers

Abstract

A two-layer geosynthetic clay barrier with a separate sorption layer manufactured by the two-layer dosing method contains a lower sealing layer formed by sodium bentonite on the lower geotextile and an upper sorption layer formed by activated zeolite or in a mixture with activated carbon or biochar directly on the lower sealing layer, with both mineral layers covered by the upper geotextile and all layers connected by needling.The method of manufacturing a two-layer geosynthetic clay barrier with independent two-layer dosing of mineral layers includes dosing a first layer of sodium bentonite onto a lower geotextile in a first dosing zone and dosing a second layer of activated zeolite or in a mixture with activated carbon or biochar directly onto the first layer of sodium bentonite in a second dosing zone, followed by covering with a top geotextile and connecting all layers by needling, each dosing zone having independent mass flow control and sequential dosing control to ensure functional separation of the layers.