|
| Contaminant (concentration interval) | Experimental conditions | Reactor type (volume) | Best degradation conditions | Reference |
| Catalyst (pH) | Electrochemical cell (current density) | Percentage (time) |
|
| Paracetamol (157 mg L−1) | 0.4 mM L−1 Fe2+ (3.0) | Pt/air-diffusion (50 mA cm−2) | CPC (10 L) | ~80% TOC removal (at 150 min) | [62] |
| Acid yellow (AY9) azo dye (200 mg L−1 TOC) | 0.5 mM L−1 Fe2+ (3.0) | Boron-doped diamond (BDD)/air-diffusion (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom and inclined 30° (2.5 L) | ~93% TOC removal (at 360 min) | [63] |
| Salicylic acid (165 mg L−1 or 100 mg L−1 of TOC) | 0.5 mM L−1 Fe2+ (3.0) | Pt/air-diffusion (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (3.0 L) | ~59% TOC removal (at 360 min) | [194] |
| Monoazo acid orange 7 (50 mg L−1 of DOC) | 0.5 mM L−1 Fe2+ (3.0) | Pt/air-diffusion (55.4 mA cm−2) | CPC (10 L) | ~97% DOC abatement (at 180 min) | [69] |
| o-Cresol (128 mg L−1) | 1.0 mM L−1 Fe2+ (3.0) | BDD anode and O2-diffusion cathode (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | ~90% TOC removal (at 120 min) | [195] |
| m-Cresol (128 mg L−1) | 1.0 mM L−1 Fe2+ (3.0) | BDD anode and O2-diffusion cathode (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | ~89% TOC removal (at 120 min) | [195] |
| p-Cresol (128 mg L−1) | 1.0 mM L−1 Fe2+ (3.0) | BDD anode and O2-diffusion cathode (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | ~87% TOC removal (at 120 min) | [195] |
| Heterocyclic antibiotic metronidazole (1.39 mmol L−1) | 0.50 mmol L−1 Fe2+ (3.0) | Pt/air-diffusion (55.4 mA cm−2) | CPC (10 L) | ~53% DOC removal (at 300 min) | [64] |
| Disperse red 1 (DR1) (0.520 mmol L−1) | 0.50 mmol L−1 Fe2+ (3.0) | BDD/air-diffusion (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | TOC abatement of 84% (at 240 min) | [84] |
| Disperse yellow 3 (DY3) (0.558 mmol L−1) | 0.50 mmol L−1 Fe2+ (3.0) | BDD/air-diffusion (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | TOC abatement of 86% (at 240 min) | [84] |
| Ibuprofen (41 mg L−1) | 0.5 mM L−1 Fe2+ (3.0) | BDD anode/O2-diffusion cathode (33.3 mA cm−2) | Open-cell compartment (0.1 L) | 88% DOC removal (at 120 min) | [43] |
| Acid orange 7 (AO7) (150 mg L−1 of TOC) | 0.75 mM L−1 Fe2+ (3.0) | Pt sheet and a carbon-PTFE air-diffusion electrode. (40 mA cm−2) | CPC (10 L) | TOC was reduced by 96% (at 360 min) | [196] |
| Acid yellow 42 (AY42) (100 mg L−1 of TOC) | 1.0 mM L−1 Fe2+ (3.0) | Boron-doped diamond (BDD) anode and an air diffusion cathode (ADC) (50 mA cm−2) | CPC (8 L) | ~80% TOC removal (at 270 min) | [65] |
| Organic matter present in slaughterhouse wastewater (52 mg L−1 of TOC) | 1.0 mM L−1 Fe2+ (3.0) | Si/BDD thin-film anode and carbon-PTFE air-diffusion cathode (50 mA cm−2) | Open-cell compartment (0.1 L) | 4 mg L−1 of total organic carbon (TOC) (at 240 min) | [91] |
| Pharmaceutical ranitidine (112.6 mg L−1) | 0.5 mM L−1 Fe2+ (3.0) | Pt sheet anode and a carbon-PTFE air-diffusion cathode (100 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | 67% TOC removal (at 360 min) | [197] |
| Antibiotic trimethoprim (200 mg L−1) | 1.0 mM L−1 Fe2+ (3.0) | RuO2/Ti mesh electrodes (18 mA cm−2) | Cylindrical quartz cell (125 mL) | 80% TOC decay (at 360 min) | [61] |
| Allura red AC azo dye (460 mg L−1) | 0.5 mM L−1 Fe2+ (3.0) | Pt sheet anode and a carbon-PTFE air-diffusion cathode (100 mA cm−2) | A planar solar photoreactor (2.5 L) | 97% TOC decay (at 180 min) | [85] |
| Sulfanilic acid (240 mg L−1 or 100 mg L−1 of TOC) | 0.5 mM L−1 Fe2+ (4.0) | Pt/air-diffusion (100 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | TOC was reduced by 76% (at 120 min) | [56] |
| Chloramphenicol (2,2-dicloro-N-[1,3-dihydroxy-1-(4-nitrophenyl)propan-2-yl] acetamide) (245 mg L−1) | 0.5 mM L−1 Fe2+ (3.0) | Pt/air-diffusion filter-press cell (100 mA cm−2) | CPC (10 L) | DOC was reduced by 89% (at 180 min) | [86] |
| Sunset yellow FCF azo dye (290 mg L−1) | 0.5 mM L−1 Fe2+ (3.0) | Pt/carbon-PTFE air-diffusion cell (77.6 mA cm−2) | CPC (10 L) | TOC was reduced by 94% (at 150 min) | [198] |
| Sulfanilamide (239 mg L−1) | 0.5 mM L−1 Fe2+ (3.0) | Pt/carbon-PTFE air-diffusion cell (50 mA cm−2) | Polycarbonate box built-up with a mirror at the bottom (2.5 L) | DOC decay of 91% (at 180 min) | [199] |
| Tebuthiuron (0.18 mM L−1) | 0.5 mM L−1 Fe2+(3.0) | BDD anode and a carbon-PTFE air-diffusion cathode (100 mA cm−2) | Solar flow plant (2.5 L) | 75% TOC removal (at 360 min) | [200] |
| A sanitary landfill leachate previously subjected to biological and coagulation processes (337–430 mg L−1 of DOC) | 60 mg L−1 Fe3+ and oxalic acid to get Fe(III)-to-oxalate molar ratio of 1 : 3 (2.8) | BDD anode and a carbon-PTFE air-diffusion cathode (200 mA cm−2) | Lab-scale flow plant (2.2 L) | DOC decay of 80% (at 300 min) | [201] |
| Atrazine (20 mg L−1) | 0.1 mM L−1 Fe2+ (3.0) | BDD thin-film electrode on Nb (13.33 mA cm−2) | In an open, undivided and cylindrical tank reactor (200 mL) | TOC reduction of 70% (at 300 min) | [202] |
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