A method of selective regeneration of rare earth elements and/or toxic metals harmful to the environment from e-waste, particularly from cathode-ray tubes and CRT monitors

摘要

A method of selective regeneration of rare earth elements and/or toxic metals harmful to the environment from e-waste, particularly from cathode-ray tubes and CRT monitors, during which the e-waste is crushed, the resulting crushed material or its sucked fraction is dissolved in an acid and the resulting solution is used as a working electrolyte. The rare earth elements and/or the toxic metals harmful to the environment are eliminated from the working electrolyte in an electrochemical cell provided with an anode and a cathode by the action of electrochemical reactions initiated by the difference in electrical potentials between the electrodes. The working electrode (11) is a cathode, which is formed from an electrodeposition material or is provided with an electrodeposition material on which there is deposited at least one rare earth element and/or at least one toxic metal by means of an electrochemical reduction reaction of the working electrolyte with the electrodeposition material. The counter electrode (10) is an anode made of an inert material resistant to electrochemical dissolution of the working electrolyte during the electrochemical reaction.