In situ maintenance method of rock environment contaminated with harmful chemical compounds

摘要

The invention relates to a method for the in-situ remediation of localities contaminated by harmful chemical compounds, in which the rock environment application borehole applied aqueous nanoparticle suspension zero-valent iron, which due to the groundwater flow penetrates into the free space of the rock medium and moves them, whereby nanoparticles zerovalent iron reacts with harmful chemical compounds occupied in rocks and break them down into less harmful and / or non-harmful substances. Before and / or during and / or after application of the aqueous nanoparticle suspension zero-valent iron is thereby into the rock environment by at least one of the anode and the cathode begins to recycle the direct electric current while between at least one anode and the cathode an electric field with an intensity of 0 5 to 100 V / m, which results in the vicinity of the cathode to reduce the surrounding water and H + ions and raise the pH, resulting in increase of decrease of the negative zeta potential of nanoparticles zero-valent iron contained in this water. They are a consequence of which repel from each other and from the surrounding rock environment, which prevents them from clumping into aggregates and their capture on the geological environment, and support the movement of the rock environment with underground water. DC electric current is supplied free electrons, thereby simultaneously inhibit oxidation of the surface of the nanoparticle zero-valent iron in order to support and prolong their reactivity.