Abstract: An arrangement for intercepting entrained contaminants from a gaseous medium in a scrubbing liquid has a whirling chamber, a droplet-separating passage, and an impeller arranged coaxially downstream of one another. The whirling chamber has a constant-width inner annular zone and an outer annular zone surrounding the inner annular zone and decreasing in its axial width in the radially outward direction. A housing surrounds the impeller and/or the passage and is either cylindrical or spiral-shaped or partly both, and in the latter event the differently shaped parts of the housing are separated by a partition which has a central orifice of a smaller diameter than that of the impeller.