Degradation of dimethyl terephthalate by Pasteurella multocida Sa and Sphingomonas paucimobilis Sy isolated from mangrove sediment

Jiaxi Li, Ji Dong Gu*, Jun Hua Yao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Biodegradation of dimethyl terephthalate (DMT) by individual species of bacteria isolated from mangrove sediment was conducted in batch experiments. Four morphologically distinct microorganisms, two of which showed ability to degrade DMT completely, were obtained and identified. Pasteurella multocida Sa displayed the greatest ability in degrading 98 mg DMTl-1 within 60 h. At this initial concentration the rate of DMT degradation by P. multocida Sa was apparently higher than that by Sphingomonas paucimobilis Sy. Based on the data obtained from HPLC/MS/MS analysis degradation of DMT by these bacteria was observed to proceed with formation of monomethyl terephtlate and terephthalate acid (TA) sequentially. However, addition of TA to the culture medium containing DMT as a co-substrate was found to delay aerobic degradation of DMT by P. multocida Sa. From these results, it is evident that environmental bacteria are capable of metabolizing DMT as sole carbon and energy source and may be used in aerobic treatment of wastewater containing DMT.

Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalInternational Biodeterioration and Biodegradation
Volume56
Issue number3
DOIs
StatePublished - Oct 2005
Externally publishedYes

Keywords

  • Bacteria
  • Biodegradation
  • Dimethyl terephthalate
  • Mangrove
  • Terephthalate

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