Oxalic acid mineralization by electrochemical oxidation processes

Yao-Hui Huang, Yu Jen Shih, Cheng Hong Liu

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

In this study, two electrochemical oxidation processes were utilized to mineralize oxalic acid which was a major intermediate compound in the oxidation of phenols and other aromatic compounds. The anode rod and cathode net were made of a titanium coated with RuO2/IrO2 (Ti-DSA) and stainless steel (S.S. net, SUS304), respectively. First, the Fered-Fenton process, which used H2O2 and Fe2+ as additive reagents, achieved 85% of TOC removal. It proceeded with ligand-to-metal charge-transfer (LMCT), which was evidenced by the accumulation of metallic foil on the selected cathode. However, in the absence of H2O2/Fe2+, it showed a higher TOC removal efficiency while using Cl- only as an additive reagent due to the formation of hypochlorite on the anode. It was also found that the mineralization of oxalic acid by electrolysis generated hypochlorite better than the dosage of commercial hypochlorite without electricity. Also, pH value was a major factor that affected the mineralization efficiency of the oxalic acid due to the chlorine chemistry. 99% TOC removal could be obtained by Cl- electrolysis in an acidic environment.

Original languageEnglish
Pages (from-to)188-192
Number of pages5
JournalJournal of Hazardous Materials
Volume188
Issue number1-3
DOIs
Publication statusPublished - 2011 Apr 15

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Hypochlorous Acid
Oxalic Acid
Oxalic acid
Electrochemical oxidation
oxalic acid
Electrodes
mineralization
Electrolysis
oxidation
electrokinesis
Anodes
Cathodes
Aromatic compounds
Phenols
Chlorine
Stainless Steel
Titanium
Electricity
Metal foil
titanium

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Huang, Yao-Hui ; Shih, Yu Jen ; Liu, Cheng Hong. / Oxalic acid mineralization by electrochemical oxidation processes. In: Journal of Hazardous Materials. 2011 ; Vol. 188, No. 1-3. pp. 188-192.
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Oxalic acid mineralization by electrochemical oxidation processes. / Huang, Yao-Hui; Shih, Yu Jen; Liu, Cheng Hong.

In: Journal of Hazardous Materials, Vol. 188, No. 1-3, 15.04.2011, p. 188-192.

Research output: Contribution to journalArticle

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