Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions

Sakultantimetha, A. and Keenan, H.E. and Beattie, T.K. and Aspray, T.J. and Bangkedphol, S. and Songsasen, A. (2010) Acceleration of tributyltin biodegradation by sediment microorganisms under optimized environmental conditions. International Biodeterioration and Biodegradation, 64 (6). pp. 467-473. ISSN 0964-8305

Full text not available in this repository. (Request a copy from the Strathclyde author)

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.