Table 1

Electrodes used for the electrochemical oxidation of landfill leachates reported in the literature.

Electrode type* Advantages Disadvantages CRM content References
Noble metal Repeatability
Expensive material use
Low mineralization efficiency
High Pt [3], Ti/Pt [4,5]
PbO2 Cheap Potential leaching of toxic corrosion products
Poor performance
Absent/Low PbO2 [5]
Ti/PbO2 [912]
Ti/Pt/PbO2 [13,14]
SMO Stability Potential leaching of toxic corrosion products Low Ti/RuO2 [9,15] Ti/SnO2 [11]
MMO Stability Reproducibility
Potential leaching of toxic corrosion products
Medium/Low Ti/SnO2-PdO-RuO2 [9]
Ti/TiO2-RuO2-SnO2 [12]
Ti/Pt/SnO2-Sb2O4 [13,14]
Ti/IrO2-RuO2 [16]
Ti/TiO2-IrO2-RuO2 [17]
a-C Cheap Electrode corrosion
Low mineralization efficiency
Absent Graphite [5,9,18]
Graphite/PVC [19]
BDD High mineralization efficiency Expensive setup Low [7,1214,2025]

*SMO: Single-metal oxide; MMO: Multi-metal oxide; a-C: amorphous carbon (graphite); BDD: boron-doped diamonds.

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