Treatment of aged leachate by a three-dimensional electrochemical system with biochar as particle electrodes DOI

F. Wang,

Chengze Ye,

Jiayi Wang

и другие.

Environmental Technology, Год журнала: 2025, Номер unknown, С. 1 - 14

Опубликована: Март 27, 2025

Aged landfill leachate is a type of refractory wastewater containing high concentrations humic substances and ammonia nitrogen (NH3-N). A new three-dimensional electrocatalytic oxidation (3D-ECO) system was constructed to treat aged using composite-loaded metal electrode as the anode, titanium plate cathode, coconut shell biochar (CBC) particle electrodes. The conditions for electrochemical reaction were first optimized, pollutant removal effects two-dimensional (2D) 3D systems compared under optimal conditions. Finally, degradation mechanism analysed. results showed that when initial pH 5, current density 30 mA/cm², addition 7 g/L, spacing 4 cm, efficiency in highest. At then rates COD NH3-N 90.2% 30.4%, respectively, while same conditions, they 2D only 41.1% 17.4%, respectively. introduction CBC has increased rate organic pollutants by 49.1% reduced energy consumption 57.2%. Various active such hydrogen peroxide, hydroxyl radicals, singlet oxygen played major role pollutants. synergy between anode third (75%) enhanced overall effect leachate. Therefore, can effectively improve level removal, 3D-ECO process promising technology treating

Язык: Английский

Treatment of aged leachate by a three-dimensional electrochemical system with biochar as particle electrodes DOI

F. Wang,

Chengze Ye,

Jiayi Wang

и другие.

Environmental Technology, Год журнала: 2025, Номер unknown, С. 1 - 14

Опубликована: Март 27, 2025

Aged landfill leachate is a type of refractory wastewater containing high concentrations humic substances and ammonia nitrogen (NH3-N). A new three-dimensional electrocatalytic oxidation (3D-ECO) system was constructed to treat aged using composite-loaded metal electrode as the anode, titanium plate cathode, coconut shell biochar (CBC) particle electrodes. The conditions for electrochemical reaction were first optimized, pollutant removal effects two-dimensional (2D) 3D systems compared under optimal conditions. Finally, degradation mechanism analysed. results showed that when initial pH 5, current density 30 mA/cm², addition 7 g/L, spacing 4 cm, efficiency in highest. At then rates COD NH3-N 90.2% 30.4%, respectively, while same conditions, they 2D only 41.1% 17.4%, respectively. introduction CBC has increased rate organic pollutants by 49.1% reduced energy consumption 57.2%. Various active such hydrogen peroxide, hydroxyl radicals, singlet oxygen played major role pollutants. synergy between anode third (75%) enhanced overall effect leachate. Therefore, can effectively improve level removal, 3D-ECO process promising technology treating

Язык: Английский

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