エタノールを利用した共代謝によるトリフェニルスズの生分解 Biodegradation of Triphenyltin by Co-Metabolism with Ethanol
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Triphenyltin (TPT), an endocrine disruptor, was successfully quantified by gaschromatography using a newly developed method consisting of propylation of TPT afterconversion to a tropolone complex. Increased volatility by propylation as well as highefficiency of extraction into an organic solvent phase by tropolone allowed for measuringdegradation by-products of TPT with grater sensitivity and accuracy. Screening ofmicrobial strains capable of degrading TPT resulted in isolation of a promising strain fromsoil. This strain, identified as a Pseudomonas sp., was tolerant to TPT at 50 mg/l and grewwell in the presence of 0.16% ethanol as a carbon source. In a synthetic medium containing1 mg/l TPT and 0.16% ethanol, the strain degraded TPT at a maximum of 50% over 5days, and the by-products were 48.5% tri-phenyl, 38% di-phenyl, 12% mono-phenyl and1.5% inorganic tin. Degradation of TPT did not occur in nutrient medium, thus suggestingthat TPT might be co-metabolized with ethanol.
- Japanese journal of water treatment biology
Japanese journal of water treatment biology 42(4), 177-184, 2006-12-15
Japanese Society of Water Treatment Biology