Method for purifying and treating thiocyanide-containing wastewater

The invention discloses a method for purifying and treating thiocyanide-containing wastewater, which comprises the following steps: 1) carrying out wet catalytic oxidation treatment on a water body to be treated at the reaction temperature of 150-300 DEG C under the reaction pressure of 2-4 MPa for 2-5 hours; 2) performing steam stripping on the wet catalytic oxidation effluent to recover ammonia nitrogen; 3) mixing the steam stripping treatment effluent with copper-containing sodium formate wastewater, and carrying out complex precipitation to remove residual thiocyanide ions; (4) carrying out electrocatalytic oxidation treatment on complexing precipitation effluent; 5) carrying out adsorption treatment on the electrocatalytic oxidation effluent by using an adsorbent; and (6) carrying out distillation treatment on the adsorbed effluent, refluxing distillation residual liquid to wet catalytic oxidation treatment, and meanwhile, evaporating out a byproduct sodium sulfate salt. 本发明公开了一种含硫氰根废水的净化处置方法，包括以下步骤：1)对待