This work purposes to investigate the ability of electro-oxidation processes when they have been used to treat real refinery wastewater (RWW) produced from Al-Sammawa oilfield refinery. The process setup of a photovoltaic cell, an inverter for DC to AC, battery, and an electro -Fenton process. The Photovoltaic Electro-Fenton oxidation trial, the consequence of working parameters such as hydrogen peroxide, pH, electrolysis time, and current on the lead removal was verified. The study was improved through changing the hydrogen peroxide (10-40 ppm), pH (3-10), the electrolysis time (5-15 min), and current (0.5-2 mA), by Minitab-17 program with response surface methodology (RSM). The weight of NaCl was constant at 0.1 g. The results revealed that the electro-Fenton process possesses the highest removal efficiency of heavy metal 98% in refinery wastewater.
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