Abstract

2,4,6-Trichlorophenol (TCP) is a biologically recalcitrant compound, but its biodegradation via reductive dechlorination can be accelerated by adding an exogenous electron donor. In this work, acetate and formate were evaluated for their ability to accelerate TCP reductive dechlorination, as well to accelerate mono-oxygenation of TCP’s reduction product, phenol. Acetate and formate accelerated TCP reductive dechlorination, and the impact was proportional to the number of electron equivalents released by oxidation of the donor: 8 e equivalents per mol for acetate, compared to 2 e eq per mol for formate. The acceleration phenomenon was similar for phenol mono-oxygenation, and this increased the rate of TCP mineralization. Compared to endogenous electron equivalents generated by phenol mineralization, the impact of exogenous electron donor was stronger on a per-equivalent basis.

Original languageEnglish (US)
Pages (from-to)1-10
Number of pages10
JournalBiodegradation
DOIs
StateAccepted/In press - Apr 15 2016

Keywords

  • 2,4,6-Trichlorophenol
  • Biodegradation
  • Electron donors
  • Mono-oxygenation
  • Reductive dechlorination

ASJC Scopus subject areas

  • Environmental Engineering
  • Pollution
  • Environmental Chemistry
  • Microbiology
  • Bioengineering

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