New EU Patent at O2 / 21.02.2018
Process for obtaining health - and environment acceptable construction materials from the soil containing water soluble compounds of heavy metals : EP 3131688 (B1), 2018-01-24. Munich: European Patent Office
The invention belongs to working operations, namely to methods of remediation of contaminated soil, by which the soil containing hazardous compounds is by means of chemical reactions transformed into less harmful substance.
The purpose of the invention is to enable economically efficient obtaining of construction material, which should be chemically neutral, inert and acceptable for the environment and human health, by using the soil, in which the concentration of water soluble compounds of heavy metals, in particular those on the basis of arsenic As and/or cadmium Cd and/or lead Pb and/or zinc Zn, essentially exceeds the limit values, which are acceptable for environment and/or are not harmful for human health, so that the content of said contaminants in such obtained material will be below each pre-determined values.