Abstract: In a method of decontaminating soils, sediments and mud including at least a sand fraction and a fine particle fraction which contains a particle-like silt component to which particularly contaminants comprising heavy metals and organic compounds adhere, and wherein the contaminated silt component is separated from the mineral silt component, the fine particle fraction including the contaminants is subjected essentially at the same time to a cavitation and an oxidation treatment before the contaminated silt component is separated from the mineral silt component.

Abstract: In a process for decontaminating suspensions containing silt, pollutants and water, particularly mercury and hydrocarbon pollutants, the suspensions are heated under pressure to boiling temperature, then passed through a throttling device wherein the pressure is reduced so that, by flashing, a three-phase mixture comprising steam, residual water and solids is formed which mixture is then superheated in a pipe reactor whereby the pollutants are enriched in the steam phase, the solids are then separated out of the mixture and the steam phase is condensed for collection of the pollutants with the condensate.

Abstract: The invention relates to an apparatus for supplying divers with artificial respiratory gas mixtures with a counterlung, which can be fixed to a diver, which is hung on gimbals, which is adjusted independently of the particular floating position of the diver and which collects his exhaled gas. For the construction of a completely closed respiratory gas circuit system, it is constructed as a single-chamber container with a bottom opening and which uses the ambient water as the sealing fluid. The container is provided with a gas outlet connection arranged above the liquid level in the inner area of the container, which can be closed by means of a shutoff device controlled by the rising liquid level and which is connected by means of a waste gas hose line with the surface of the water or the inner area of a diving chamber or bell.