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6CCVD Research

Optimisation of electrochemical oxidation process with boron doped diamond (BDD) for removing COD, colour, ammonium, and phosphate in landfill leachate

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2023-05-04
JournalEnvironmental Technology
AuthorsMD Tanvir Hasnine, Elisabeth Cuervo Lumbaque, Qiuyan Yuan
InstitutionsUniversitat de Girona, Catalan Institute for Water Research
Citations15

Abstract

Section titled ā€œAbstractā€

This study investigated the electrooxidation (EO) of mature landfill leachate from the Brady Road Resource Management Facility, Winnipeg (Canada). EO using boron-doped diamond (BDD) electrodes were applied to treat real landfill leachate using a batch reactor. Response surface methodology (RSM) was used to determine the optimum process parameter levels. This research mainly focused on how different current densities (64, 95, and 125 mA/cm<sup>2</sup>) and operational time (30 min, 1, 1.5, 2, 2.5, and 3 hr.) influenced the optimisation of parameters such as chemical oxygen demand (COD), colour, ammonium, and phosphate removal in mature landfill leachate at varied pH. To attain a high percentage of removal for the parameters mentioned above, the optimal conditions were found to be a current density (J) of 125 mA/cm<sup>2</sup> and a pH of 8. The optimum conditions resulted in removal percentages of 95.47%, 80.27%, 71.15%, and 47.15% for colour, NH<sub>4</sub><sup>+</sup>, COD, and PO<sub>4</sub><sup>3-</sup> respectively, with an energy consumption of 0.05 kWh/dm<sup>3</sup>. The removal is related to a mechanism of the decomposition of water molecules to hydroxyl radicals and by direct anodic oxidation where the pollutants are transformed to CO<sub>2</sub> and H<sub>2</sub>O. The novelty of this research lies in the optimisation of BDD electrode-based treatment for the simultaneous removal of COD, ammonium, phosphate, and colour from mature leachate collected from a severely cold climatic region of Canada. The BDD electrode showed excellent removal efficiencies for the targeted contaminants with lower energy consumption, making it a feasible method for on-site landfill leachate treatment.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2018 - What a waste 2.0: a global review of solid waste management

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