Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions

A. Sakultantimetha, H.E. Keenan, T.K. Beattie, T.J. Aspray, S. Bangkedphol, A. Songsasen

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The capability of a sediment culture (SED) and bacterial isolate Enterobacter cloacae strain TISTR1971 (B3) to degrade tributyltin (TBT) were optimized by biostimulation; respiration conditions, pH of the media and ambient temperature were studied for more efficient treatment process. Three respiration conditions were investigated; aerobic with/without aeration and anaerobic with 0.1 g NO3 L1. Among the three conditions, only aeration which provided excess dissolved oxygen, extensively improved the degradation, giving half-lives of 4.08 and 3.16 days for SED and B3, respectively. Variations in the pH of the media (pH 6, 7 and 7.5) moderately affected the degradation rate, mainly at the early stage of log phase. Appropriate pH increased bioavailability by altering Kd and Kow values, and characteristic of TBT. The shortest half-life for SED was 3.53 days at pH 7.5, and 3.10 days for B3 at pH 7. The study of ambient temperature indicated strong uncertainty of degradation from seasonal variation. The half-lives were minimised at 37 C (3.22 days) for SED and at 28 C (3.12 days) for B3. Significant variation was shown between 10 and 28 C, but slightly increased at the higher temperature. This suggests appropriate temperature control at 28 C for industrial scale treatment. Investigation of these factors together for the optimum conditions lead to modification of the environment, the consequence of which was more efficient biodegradation of TBT in contaminated sediment and water.
LanguageEnglish
Pages467-473
Number of pages7
JournalInternational Biodeterioration and Biodegradation
Volume64
Issue number6
Early online date26 Jun 2010
DOIs
Publication statusPublished - Sep 2010

Fingerprint

tributyltin
Biodegradation
Microorganisms
biodegradation
Sediments
microorganism
environmental conditions
half life
sediment
aeration
respiration
Respiration
Degradation
degradation
Enterobacter cloacae
Dissolved oxygen
Temperature
bioavailability
dissolved oxygen
seasonal variation

Keywords

  • biodegradation
  • bioremediation
  • biostimulation
  • enterobacter cloacae
  • tributyltin

Cite this

Sakultantimetha, A. ; Keenan, H.E. ; Beattie, T.K. ; Aspray, T.J. ; Bangkedphol, S. ; Songsasen, A. / Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions. In: International Biodeterioration and Biodegradation . 2010 ; Vol. 64, No. 6. pp. 467-473.
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Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions. / Sakultantimetha, A.; Keenan, H.E.; Beattie, T.K.; Aspray, T.J.; Bangkedphol, S.; Songsasen, A.

In: International Biodeterioration and Biodegradation , Vol. 64, No. 6, 09.2010, p. 467-473.

Research output: Contribution to journalArticle

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T1 - Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions

AU - Sakultantimetha, A.

AU - Keenan, H.E.

AU - Beattie, T.K.

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