Electrochemical degradation of reactive orange 16 by using charcoal-based metallic composite electrodes

Zuhailie Zakaria, Mohamed Rozali Othman, Siti Zubaidah Hasan, Wan Yaacob Wan Ahmad

Research output: Contribution to journalArticle

Abstract

The performance of charcoal composite electrodes, by using commercial activated charcoal and charcoals from coconut trunk, mangrove wood, rubber wood, and sugarcane, was compared in an attempt to fabricate effective and low cost electrodes for wastewater treatment in textile industries. Reactive Orange 16 was chosen as a model dye because of its high resistance towards conventional treatment methods, while sodium chloride was selected as a supporting electrolyte. The electrode efficiencies were determined based on the percentage of Reactive Orange 16 decolourisation. The charcoals used, duration of electrolysis, functional groups present in charcoals, Brunauer-Emmett-Teller surface area and production of hypochlorite ion that contribute to the effectiveness of the electrodes were examined. The coconut trunk, rubber wood, sugarcane, mangrove wood, and commercially available activated charcoals that were incorporated into tin composite electrodes were able to degrade Reactive Orange 16 until 98.5%, 96.2%, 83.0%, 71.2%, and 29.6%, respectively, after 20 min of electrolysis. The degradation increases with duration of electrolysis. This study illustrated that the production of hypochlorite ion from sodium chloride in solution was the main factor that enhanced the Reactive Orange 16 colour removal. Adsorption process on the electrode surface did not play any significant role in the dye decolourisation.

Original languageEnglish
Pages (from-to)791-801
Number of pages11
JournalSains Malaysiana
Volume48
Issue number4
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

charcoal
electrodes
decolorization
degradation
hypochlorites
activated carbon
coconuts
rubber
sodium chloride
sugarcane
dyes
ions
duration
tin
textile industry
wastewater treatment
electrolytes
surface area
adsorption
electrolysis

Keywords

  • Agricultural waste
  • Composite
  • Decolourisation
  • Electrolysis
  • Reactive orange 16

ASJC Scopus subject areas

  • General

Cite this

Electrochemical degradation of reactive orange 16 by using charcoal-based metallic composite electrodes. / Zakaria, Zuhailie; Othman, Mohamed Rozali; Hasan, Siti Zubaidah; Wan Ahmad, Wan Yaacob.

In: Sains Malaysiana, Vol. 48, No. 4, 01.01.2019, p. 791-801.

Research output: Contribution to journalArticle

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