1. Polar plate  　　

The flocs produced by the iron plate are small and dense, and settle quickly, but the effluent is often yellow, and the iron plate is easy to continue to rust when the power is cut off. The flocs produced by the aluminum plate are large and loose, and settle slowly, but do not produce chromaticity and have strong adsorption capacity. 　　The distance between the plates will also affect the growth of the flocculant and the subsequent flocculation effect. Li Zhi et al. found that the electrode plate spacing is the main influencing factor for the removal of COD by electro-flocculation when studying the treatment of reverse osmosis concentrated water by electro-flocculation . If the distance between the plates is too large, the electrolysis efficiency will be low and the concentration polarization will increase ; if the distance between the plates is too small, short circuit and floc blockage between the plates will occur, which will reduce the effective electrolysis area of ??the plates.    　　

2. Current density  　　

Within a certain range, the current density is large, the amount of flocculant produced is large, and the efficiency of electric flocculation is high. However, excessive current density can easily cause excessive polarization of electrodes, accelerate electrode passivation, increase electrode plates and power consumption without improving processing efficiency.  　　

3. PH  　　

pH is too low or too high is not conducive to the formation of flocculant, poly iron, polyaluminum in neutral or slightly alkaline (pH at 6-9) conditions, respectively, an amorphous form: [of Al (H2O). 3] and non- Shaped Fe(OH)3 has strong adsorption capacity and good coagulation effect.  　　

4. Electrolysis time  　　

If the electrolysis time is less than the optimal reaction time, the electrocoagulation process will not produce enough hydroxyl complexes to react with the target pollutants or the two will not have sufficient reaction time, and the treatment effect will be greatly reduced at this time. When the optimal reaction time is exceeded, the removal rate remains basically unchanged, but the energy consumption increases. 

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