Growth of Pseudomonas sp. TX1 on a wide range of octylphenol polyethoxylate concentrations and the formation of dicarboxylated metabolites

Yi Wen Lin, Gia Luen Guo, Hsiao Cheng Hsieh, Shir Ly Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Pseudomonas sp. TX1, is able to use octylphenol polyethoxylates (OPEOn, or Triton® X-100; average n = 9.5) as a sole carbon source. It can grow on 0.05-20% of OPEOn with a specific growth rate of 0.34-0.44 h-1. High-performance liquid chromatography-mass spectrometer analysis of OPEOn degraded metabolites revealed that strain TX1 was able to shorten the ethoxylate chain and produce octylphenol (OP). Furthermore, formation of the short carboxylate metabolites, such as carboxyoctylphenol polyethoxylates (COPEOn, n = 2, 3) and carboxyoctylphenol polyethoxycarboxylates (COPECn, n = 2, 3) began at the log stage, while octylphenol polyethoxycarboxylates (OPECn, n = 1-3) was formed at the stationary phase. All the short-ethoxylated metabolites, OPEOn, OPECn, COPEOn, and COPECn, accumulated when the cells were in the stationary phase. This study is the first to demonstrate the formation of COPEOn and COPECn from OPEOn by an aerobic bacterium.

Original languageEnglish
Pages (from-to)2853-2859
Number of pages7
JournalBioresource Technology
Volume101
Issue number8
DOIs
StatePublished - Apr 2010

Keywords

  • Biodegradation
  • Metabolites
  • Nonionic surfactants
  • Octylphenol polyethoxylates
  • Pseudomonas sp.

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