Removing organic compounds from aqueous medium via wet peroxidation by gold catalysts

Yi Fan Han*, Nopphawan Phonthammachai, Kanaparthi Ramesh, Ziyi Zhong, T. I.M. White

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

A new heterogeneous Fenton-like system, consisting of supported Au catalysts and hydrogen peroxide, was proved to be effective in removing low level organic compounds (ca. 100 ppm) such as phenol, ethanol, formaldehyde, and acetone in aqueous solution. Among all gold catalysts the Au/hydroxyapatite (Au/HAp) exhibits the highest activity, and even better than the conventional iron ions exchanged zeolite (Fe/ZSM-5) catalyst. In particular, unlike the limited operational pH range (pH: 2-5) for the other heterogeneous Fenton catalysts such as Fe/ZSM-5, Au/HAp shows higher stability even in strong acid solution (pH ∼ 2), due to almost no leaching of active metal from supports into solution. It can be potentially applied in treating the industrial wastewaters with strong acidity and purifying drinking water. In addition, in the case of complete oxidation of phenol, a plausible route was suggested for deep understanding of this process.

Original languageEnglish
Pages (from-to)908-912
Number of pages5
JournalEnvironmental Science & Technology
Volume42
Issue number3
DOIs
StatePublished - 1 Feb 2008
Externally publishedYes

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