| Initial characteristic of leachate | COD | BOD/COD | Optimal condition | Reference | COD (mg/L) | BOD (mg/L) | pH | Removal (%) | after treatment |
| Fenton |
| 1300 | 30 | 8.7 | — | — | pH: 3.5, Fe2(SO4)3: 500 mg/L, H2O2: 1650 mg/L | [39] | 8298–8894 | — | 6.65-6.69 | — | — | pH: 2.5, H2O2/Fe2+ (molar ratio): 1.5, reaction time: 30 min | [44] | 10540 | 2300 | 8.2 | 60 | 0.5 | pH: 3, Fe2+: 275 mg/L, H2O2: 3300 mg/L, reaction time: 2h | [49] | 837–6119 | 42.50–620.00 | 8.09–8.47 | 80 (young leachate) 60~70 (old leachate) | — | pH: 2.5, H2O2/Fe2+ (molar ratio): 1.5, [H2O2]: 0.075 M | [46] | 1100–1300 | — | 8.18 | 61 | — | pH: 3, [H2O2]: 0.24 M, H2O2/Fe2+(molar ratio): 3 | [47] | 8894 | — | 6.65–6.69 | 89 | — | pH: 2.5, [H2O2]: 0.15 M, H2O2/Fe2+ (molar ratio): 3 | [48] | | | | 66 | 0.88 | pH: 3.5, H2O2: 650 mg/L, H2O2/Fe2+ (molar ratio): 1 : 19 | [50] |
| Photo-Fenton |
| 3824 | 680 | 7.94 | 86 | — | Fe2+: 2000 mg/L, H2O2: 10000 mg/L | [51] | | | | 49 | 0.4 | pH: 2.8, Fe2+: 10 mg/L, H2O2: 2000 mg/L | [52] | 1150 | 4.6 | | 70 | | pH: 3, Fe2+: 56 mg/L, H2O2: 34 mg/L, UV: 80 KW/m3 | [53] |
| Electro-Fenton |
| 5000 | — | 6.4 | 83.4 | — | pH: 3, H2O2: 0.34 mol/L, Fe2+: 0.038 mol/L, I: 2 A,d = 2.1 cm | [54] | 2350 | — | 2.36 | 72 | — | pH: 3, H2O2: 2000 mg/L, I: 2 A, reaction time: 20 min | [55] | 1941 | 195 | 8.1 | 69 | 0.29 | pH: 4, H2O2: 750 mg/L | [56] |
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