As mentioned above, the Fenton process serves both oxidation and coagulation functions. In the oxidation step, H2O2 (30%, w/w) was added to a water sample, and then the water sample was mixed rapidly for 30–60 min, depending on the designated oxidation time. Fenton reaction was ceased by controlled the pH of water sample at 7.0 with 3 M NaOH. In the coagulation step, the above oxidized water sample was mixed slowly for 15 min and then allowed to standstill for 30 min sedimentation to take place.
The PFS coagulation and the Fenton process were performed with jar test equipments (Z-6, Shenzhen, China) comprising six paddle rotors (24.5 mm × 63.5 mm), equipped with six beakers of 1 L each. The whole experiments were performed at the room temperature 20 ± 2 °C.
As mentioned above, the Fenton process serves both oxidation and coagulation functions. In the oxidation step, H2O2 (30%, w/w) was added to a water sample, and then the water sample was mixed rapidly for 30–60 min, depending on the designated oxidation time. Fenton reaction was ceased by controlled the pH of water sample at 7.0 with 3 M NaOH. In the coagulation step, the above oxidized water sample was mixed slowly for 15 min and then allowed to standstill for 30 min sedimentation to take place.The PFS coagulation and the Fenton process were performed with jar test equipments (Z-6, Shenzhen, China) comprising six paddle rotors (24.5 mm × 63.5 mm), equipped with six beakers of 1 L each. The whole experiments were performed at the room temperature 20 ± 2 °C.
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