Constant current spouted bed particle electro-deposition method had been studied with simulated wastewater containing copper and nickel as the research object under different experimental conditions such as pH

current

temperature with N2. experimental results showed that under the experiment conditions of pH 3 (first 210 min) and 4.5 (next 270 min)

electrolyte concentration 1 g·L-1

constant current 15 A

cathode particle size 1.8 mm

electrolyte temperature 25℃ with blowing N2

the largest removal rate of Cu2+ was 99.88% and Ni2+ was 85.21% after 480 min. During the experiments

DO first rapid increased to the maximum

and then came down slowly. Blowing N2 into electrolyte could significantly reduce the dissolved oxygen concentration

which could effectively inhibit deposited Cu and Ni once again return to dissolve and improve the removal rate of deposited metals. The replacement reaction between Ni and Cu2+ weakened

the corrosion rate of deposited copper while it was intensified for nickel. Thus

the electro-deposition of mixed copper and nickel showed a certain order

which suggested that the separate recycling of metals in wastewater was feasible with the spouted bed particle electro-deposition method under certain conditions.