Under the action of an external DC electric field, the anode oxidizes and dissolves in the solution to produce aluminum ions or iron ions. These metal ions are hydrolyzed at a suitable pH to produce a series of corresponding hydrolysis products. These hydrolysis products have excellent flocculation effects and can be compressed Electric double layer, adsorption bridging, net trapping and other functions gather pollutants and then carry out solid-liquid separation ; at the same time, other functions such as electrolytic oxidation-reduction and electrolytic air flotation will occur. 

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