Electro-oxidation of palm oil mill effluent using a boron-doped diamond anode

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Abstract

The palm oil industry produces a large amount of wastewater as palm oil mill effluent (POME) that contains high concentrations of organic compounds, which are difficult to completely remove and consequently result in the degradation of aquatic ecosystems. In this work, palmitic acid was used as a model compound of POME to study its oxidation reactions. The experiment was conducted in a flow cell system with boron-doped diamond as the anode. A voltammetric technique was used to remove palmitic acid while observing the change in chemical oxygen demand concentration to monitor the reaction. The effects of supporting electrolyte, potential, time, and flow rate on the oxidation were studied. The results indicate that degradation of palmitic acid occurs as an indirect effect of electro-oxidation at high potential in the region of oxygen evolution or formation of hydroxyl radicals. Furthermore, under optimum conditions, up to 87.91% of the palmitic acid could be electrochemically removed.

Original languageEnglish
Article number012001
JournalIOP Conference Series: Materials Science and Engineering
Volume496
Issue number1
DOIs
Publication statusPublished - 22 Feb 2019
Event2nd International Conference on Current Progress in Functional Materials 2017, ISCPFM 2017 - Bali, Indonesia
Duration: 8 Nov 20179 Nov 2017

Keywords

  • boron-doped diamond
  • electro-oxidation
  • hydroxyl radicals
  • palmitic acid

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