It is disclosed an apparatus for electrostatic deactivation and removal of hazardous aerosols from air, said apparatus comprising an ionization zone (2) for charging aerosols contained in a stream of supplied air and for obtaining aerosols having negative air ions, a spraying zone (4) for generating positively charged droplets and for absorbing said charged aerosols by contacting them with said generated positively charged droplets, and a collection device for collecting said negative air ions and said absorbed aerosols from said spraying zone (4).