Separation and Decontaminant Recovery Process and Apparatus for Separating Dialyzed Cathode Waste in Cation-Containing Waste Treatment Process by Resin-Rechargeable Electrodialysis

摘要

The present invention relates to a method for regenerating a waste solution containing cations such as a radioactive substance such as a decontamination waste liquid and a harmful metal ion by a resin-rechargeable electrodialysis method. The cationic waste solution electrododulated with a cathode chamber is subjected to a pH adjustment and an ultrasonic or physical decontamination method, Wherein the resin-loaded electrodialyzer is configured to have a structure in which a cation exchange resin is charged between two membranes having a property of selectively passing only positive ions, and inserted between the positive electrode and the negative electrode. When a direct current flows between the two electrodes of the electrodialyzer and a contaminated waste liquid flows between the two membranes, the radioactive substances and all the cation species in the waste liquid permeate through the cation exchange membrane and electrodialyzed to the cathode chamber, The ultrasonic waves generated from the ultrasonic oscillator mounted on the cathode plate in the cathode chamber desorbs the electrodeposited cation electrodeposited on the cathode surface while suppressing the adhesion of the sediment to the anode plate. In addition, at the end of the treatment of the contaminated waste solution, the anion generated electrochemically by the negative electrode reaction converts the pH of the anolyte to alkaline, thereby causing radioactive substances such as Co-60 electrodialyzed with the catholyte and harmful metal ions to be precipitated , The precipitate is removed by passing through a filter or a centrifuge, and a solution in which a catholyte prepared by electrolytic reduction and a pollutant removed through a resin-loaded electrodialysis bath are reused as a decontamination agent.