Method and device for efficiently recovering nickel ions in electroplating wastewater

• Main Authors: DING BAOQIANG, ZHANG JUNNAN, ZHANG ZHIJIE, LI HAIYANG, LI SHUYAN, MU HAI, MA LIN, WU WENMING
• Format: Patent
• Language: Chinese; English
• Published: 17.03.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of electroplating wastewater recovery, in particular to a method and device for efficiently recovering nickel ions in electroplating wastewater, and the method comprises the following steps: adsorption and purification: treating nickel-containing electroplating wastewater by using resin and a dynamic continuous adsorption method, and stopping the adsorption process when the concentration of nickel ions at an outlet reaches saturation; a hydrochloric acid solution with a preset concentration is prepared, resin is regenerated in a dynamic continuous mode, and regeneration is stopped when regeneration liquid reaches a preset volume; and oxalic acid precipitation: preparing an oxalic acid solution with a preset concentration, and stirring the oxalic acid solution and the regenerated nickel-containing concentrated solution for reaction to obtain a precipitate. According to the method for efficiently recycling the nickel ions, enrichment of the nickel ions with low conce