Electrochemical oxidation of landfill leachate: Investigation of operational parameters and kinetics using graphite-PVC composite electrode as anode

Zainab H. Mussa, Mohamed Rozali Othman, Md. Pauzi Abdullah

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The preparation of a new carbon composite electrode constructed from graphite-polyvinyl chloride (graphite-PVC) compressed mixtures was used for the first time to treat landfill leachate in Malaysia under electrochemical oxidation. The electrochemical oxidation of landfill leachate was studied on graphite-PVC and Pt electrodes as anode and cathode, respectively, with the presence of NaCl electrolyte in a batch electrochemical reactor. The highest chemical oxygen demand (COD) and color removals of 87% and 97%, respectively, were achieved at pH 3, 0.58% (m/v) + 2078 mg L<sup>-</sup> electrolyte concentration, 15 V applied voltage, and 105 min electrolysis time. To confirm electrochemical oxidation, a field emission scanning electron microscopy (FESEM) was used to evaluate the surface of graphite-PVC electrode before and after treatment. The constant rate in terms of pseudo-first-order kinetics increased from 0.0015 min<sup>-</sup> to 0.0186 min<sup>-</sup> at 5 and 20 V applied voltage. The graphite-PVC composite exhibits favorable qualities as an electrode material because of its mechanical resistance, low cost, simple preparation, and easy renewal of the electrode surface.

Original languageEnglish
Pages (from-to)939-948
Number of pages10
JournalJournal of the Brazilian Chemical Society
Volume26
Issue number5
DOIs
Publication statusPublished - 1 May 2015

Fingerprint

Chemical Water Pollutants
Graphite
Electrochemical oxidation
Polyvinyl Chloride
Anodes
Electrodes
Kinetics
Composite materials
Electrolytes
Color removal (water treatment)
Chemical oxygen demand
Electric potential
Electrolysis
Field emission
Cathodes
Carbon
Scanning electron microscopy
Costs

Keywords

  • Composite electrode
  • Electrochemical oxidation
  • Graphite-PVC
  • Kinetics study
  • Landfill leachate

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Electrochemical oxidation of landfill leachate : Investigation of operational parameters and kinetics using graphite-PVC composite electrode as anode. / Mussa, Zainab H.; Othman, Mohamed Rozali; Abdullah, Md. Pauzi.

In: Journal of the Brazilian Chemical Society, Vol. 26, No. 5, 01.05.2015, p. 939-948.

Research output: Contribution to journalArticle

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