Abstract

The aerobic biodegradation of dimethyl phthalate (DMP) is initiated with two hydrolysis reactions that generate an intermediate, phthalic acid (PA), that is further biodegraded through a two-step di-oxygenation reaction. DMP biodegradation is inhibited when PA accumulates, but DMP’s biodegradation can be enhanced by adding an exogenous electron donor. We evaluated the effect of adding succinate, acetate, or formate as an exogenous electron donor. PA removal rates were increased by 15 and 30% for initial PA concentrations of 0.3 and 0.6 mM when 0.15 and 0.30 mM succinate, respectively, were added as exogenous electron donor. The same electron-equivalent additions of acetate and formate had the same acceleration impacts on PA removal. Consequently, the DMP-removal rate, even PA coexisting with DMP simultaneously, was accelerated by 37% by simultaneous addition of 0.3 mM succinate. Thus, lowering the accumulation of PA by addition of an electron increased the rate of DMP biodegradation.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalBiodegradation
DOIs
StateAccepted/In press - Aug 23 2017

Fingerprint

Oxygenation
oxygenation
phthalate
Biodegradation
biodegradation
formic acid
Acids
acid
Electrons
Succinic Acid
electron
acetate
Acetates
dimethyl phthalate
phthalic acid
hydrolysis
Hydrolysis
rate
removal

Keywords

  • Di-oxygenation
  • Dimethyl phthalate
  • Electron donors
  • Phthalic acid

ASJC Scopus subject areas

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

Cite this

Enhanced dimethyl phthalate biodegradation by accelerating phthalic acid di-oxygenation. / Tang, Yingxia; Zhang, Yongming; Jiang, Ling; Yang, Chao; Rittmann, Bruce.

In: Biodegradation, 23.08.2017, p. 1-9.

Research output: Contribution to journalArticle

Tang, Yingxia ; Zhang, Yongming ; Jiang, Ling ; Yang, Chao ; Rittmann, Bruce. / Enhanced dimethyl phthalate biodegradation by accelerating phthalic acid di-oxygenation. In: Biodegradation. 2017 ; pp. 1-9.
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abstract = "The aerobic biodegradation of dimethyl phthalate (DMP) is initiated with two hydrolysis reactions that generate an intermediate, phthalic acid (PA), that is further biodegraded through a two-step di-oxygenation reaction. DMP biodegradation is inhibited when PA accumulates, but DMP’s biodegradation can be enhanced by adding an exogenous electron donor. We evaluated the effect of adding succinate, acetate, or formate as an exogenous electron donor. PA removal rates were increased by 15 and 30{\%} for initial PA concentrations of 0.3 and 0.6 mM when 0.15 and 0.30 mM succinate, respectively, were added as exogenous electron donor. The same electron-equivalent additions of acetate and formate had the same acceleration impacts on PA removal. Consequently, the DMP-removal rate, even PA coexisting with DMP simultaneously, was accelerated by 37{\%} by simultaneous addition of 0.3 mM succinate. Thus, lowering the accumulation of PA by addition of an electron increased the rate of DMP biodegradation.",
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N2 - The aerobic biodegradation of dimethyl phthalate (DMP) is initiated with two hydrolysis reactions that generate an intermediate, phthalic acid (PA), that is further biodegraded through a two-step di-oxygenation reaction. DMP biodegradation is inhibited when PA accumulates, but DMP’s biodegradation can be enhanced by adding an exogenous electron donor. We evaluated the effect of adding succinate, acetate, or formate as an exogenous electron donor. PA removal rates were increased by 15 and 30% for initial PA concentrations of 0.3 and 0.6 mM when 0.15 and 0.30 mM succinate, respectively, were added as exogenous electron donor. The same electron-equivalent additions of acetate and formate had the same acceleration impacts on PA removal. Consequently, the DMP-removal rate, even PA coexisting with DMP simultaneously, was accelerated by 37% by simultaneous addition of 0.3 mM succinate. Thus, lowering the accumulation of PA by addition of an electron increased the rate of DMP biodegradation.

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