来自阿塔卡马沙漠的嗜极细菌对三丁基锡（TBT）的生物降解及锡副产物的形态分析
Biodegradation of Tributyltin (TBT) by Extremophile Bacteria from Atacama Desert and Speciation of Tin By-products.
作者信息
Yáñez Jorge, Riffo Paula, Santander Paola, Mansilla Héctor D, Mondaca María Angélica, Campos Víctor, Amarasiriwardena Dulasiri
机构信息
Department of Analytical and Inorganic Chemistry, Faculty of Chemical Sciences, University of Concepción, PO Box 160-C, Edmundo Larenas 129, Concepción, Chile,
出版信息
Bull Environ Contam Toxicol. 2015 Jul;95(1):126-30. doi: 10.1007/s00128-015-1561-1. Epub 2015 May 15.
Biodegradation of tributyltin (TBT) by four tin resistant Gram negative bacteria isolated from extremely contaminated river sediments in the Atacama Desert in Chile was studied. Moraxella osloensis showed the greatest resistance and degradation capability of TBT, producing less toxic by-products, such as dibutyltin (DBT) and inorganic tin. In 7 days, approximately 80 % of TBT degradation was achieved, generating close to 20 % of DBT as degradation product. The degradation rate constant (k) was 0.022 [day(-1)] and TBT half-life (t1/2) in culture was 4.3 days. Debutylation is stated a probable mechanism of TBT degradation.
研究了从智利阿塔卡马沙漠极度污染的河流沉积物中分离出的4株耐锡革兰氏阴性菌对三丁基锡（TBT）的生物降解作用。奥斯陆莫拉菌对TBT表现出最强的抗性和降解能力，产生的毒性较小的副产物，如二丁基锡（DBT）和无机锡。在7天内，实现了约80%的TBT降解，产生了近20%的DBT作为降解产物。降解速率常数（k）为0.022 [天⁻¹]，培养物中TBT的半衰期（t1/2）为4.3天。脱丁基化被认为是TBT降解的一种可能机制。
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