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. 2012 Aug 2;9(1):3. doi: 10.1186/1735-2746-9-3

Figure 3.

Figure 3

Effect of H2O2 to Fe2+/ Fe3+ ratio on COD removal by different AOPs (H2O2= 3000 mg/L for Fenton and photo-Fenton; H2O2= 5000 mg/L for Fenton-like; oxidation time = 60 min; pH = 4).