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Degradation of Low Concentrations of Formaldehyde in Sono Catalytic Ozonation Advanced Oxidation Processes using Zero-valent Iron

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Figure

Figure 1.  Schematic diagram of SCO reactor: (1) ozone generator; (2) ultrasonic homogenizer; (3) KI solution; (4) reactor; (5) temperature-controlled bath; (6) sample content NZVI; (7) magnet; and (8) magnetic stirrer
Figure 3.  Effect of pH on HCHO degradation ([HCHO] = 10 mg L-1, O3 dosage = 100 mg h-1, [NZVI] = 200 mg L-1, US power = 60 W, and reaction time = 45 min)
Figure 5. Effect of ozone dosage on HCHO degradation ([HCHO] = 10 mg L-1, [NZVI] = 200 mg L-1, pH = 5, US power = 100 W, and reaction time = 45 min)
Figure 7. Effect of HCHO concentration on HCHO degradation (pH = 5, US power = 100 W, ozone dosage = 200 mg h-1, [NZVI] = 200 mg L-1, and reaction time = 45 min)

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