Abstract: In order to find out the feasibility in dealing with Ni²⁺ containing wastewater with constant current spouted bed particle electro-deposition method，the technical conditions optimization research has been conducted with simulated acid Ni²⁺ wastewater.The results are as follows：①with the increase of pH value，the removal rate of Ni²⁺ and current efficiency increased first and then decreased; with the increase of current value，the removal rate of Ni²⁺ increased，current efficiency decreased; both removal rate of Ni²⁺ and current efficiency decreased as the temperature increased; ②DO value increased with the increase of pH and current value，while decreased with temperature.Blowing nitrogen effectively reduced the DO value.③Blowing nitrogen prevented the nickel deposited back to dissolve，also weakened the concentration polarization which could result in the decline of the Ni²⁺ removal rate and current efficiency.④under the conditions of Ni²⁺ concentration 1 g/L，pH=4.5，particle size 1.8 mm，current intensity 15 A，electrolyte temperature 25 ℃ and blowing N₂ for 180 min，the removal rate of Ni²⁺ was 74.77%，the average current efficiency was 67.67%，which were higher by 28 and 16.66 percentage points than that without N₂ respectively.Since electro-deposition can directly obtain nickel metal from wastewater，this method has remarkable economic and environmental benefits in practice，and also can be set as a pretreatment method before ion exchange and membrane separation.

Key words: Electro-deposition, Spouted bed, Removal rate of Ni2+, Current efficiency, DO value