The RO brine of petrochemical integrated wastewater was collected from a petrochemical factory that mainly produces terephthalic acid (Dalian, China). The primary characteristics of the brine are listed in Table 1. Brie y, this brine is transparent that free from visible insoluble impurities and strong odor. It exhibits a COD value ranging from 35 to 45 mg/L, while the total dissolved solids (TDS) range between 5500 and 6000 mg/L. The conductivity of the brine falls within the range of 7500 to 8400 µs/cm, making it suitable for electrochemical treatment. Based on the characteristics of the brine, the main reaction equations in the electrophoresis tank can be determined as follows: the rst combination is similar to that in the chlor-alkali industry (Moussallem et al. 2008) , where the electrolysis of chlorine salt solutions produces OH -, hydrogen and chlorine (Equations 1-2); the second combination involves the cleavage of salt and water, resulting in the production of H + , OH -, H 2 , and O 2 (Equations 3-4) (Kumar et al. 2019) .