A floating structure for cleansing water contaminated with hydrocarbons comprising a substantially cone-shaped suction hood provided with a suction system. The suction hood contains in its interior one or more skimmers equipped with oleophilic belt capable of collecting the hydrocarbons floating on the water surface. The suction system is capable of producing an air current on the water surface to be cleansed, which pushes the hydrocarbon film towards the oleophilic belt of said one or more skimmers, thus facilitating hydrocarbon collection. Said floating structure is capable of moving on the water surface either autonomously or hooked onto a nautical means.
