Photocatalytic degradation of methyl-tert-butyl ether in TiO2 slurries: A proposed reaction scheme

Reynaldo D. Barreto*, Kimberly A. Gray, Krista Anders

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

136 Scopus citations

Abstract

Among the various alternatives to enhance the octane rating of gasoline, methyl-tert-butyl ether (MTBE) has become increasingly the compound of choice. Due to its high solubility in water there are some environmental concerns related to the remediation of waters contaminated with gasoline containing MTBE. Although MTBE is difficult to treat economically with conventional techniques, it has been found to be readily degraded photocatalytically. In batch TiO2 slurries and under the experimental conditions used in these experiments MTBE degradation proceeded with an initial pseudo first-order rate constant of 1.2 · 10-3 s-1. The primary by-products of this reaction have been identified as t-butyl formate and t-butyl alcohol, both of which are also readily degraded photocatalytically, albeit at slightly slower rates than MTBE. Mass balance calculations have shown that MTBE is virtually completely mineralized and a reaction scheme is proposed.

Original languageEnglish (US)
Pages (from-to)1243-1248
Number of pages6
JournalWater Research
Volume29
Issue number5
DOIs
StatePublished - May 1995

Keywords

  • MTBE
  • hydrogen peroxide
  • hydroxyl radical
  • mineralization
  • photocatalysis
  • reaction pathway
  • tert-butyl alcohol
  • tert-butyl formate

ASJC Scopus subject areas

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

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