Arrangement for retaining contaminants from contaminated landfill leachates with an inorganic sealing layer and method of manufacturing said layer

摘要

To retain contaminants from landfill leachates, it is proposed to assign to a sealing layer (2) of mineral sealing materials, for example clay minerals, an adsorptive layer (6) which contains, at least in the form of mixtures, materials which are able to bind contaminants in the leachate by physical and/or chemical adsorption. In the case of very slow percolation through a layer of mineral sealing materials, as corresponds to a leaching or diffusion process, it is possible to withdraw the contaminants from the leachate on the solid body, and thus retain them. The essential advantage of the invention is that as a result of these adsorption processes, the permeability of the complete system lessens with increasing age, and the sealing action therefore improves to beyond geological time periods. ……