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首页> 外文期刊>Environmental Science & Technology >Biodegradation of synthetic base fluid surrogates in Gulf of Mexico sediments under simulated deep-sea conditions
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Biodegradation of synthetic base fluid surrogates in Gulf of Mexico sediments under simulated deep-sea conditions

机译：模拟深海条件下墨西哥湾沉积物中合成基础液替代物的生物降解

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摘要

In this study, an anaerobic marine biodegradability test was adapted to study the fate of synthetic base fluid (SBF) surrogates, ethyl oleate and tetradecene, by deep-sea microorganisms. Sediment samples from hundreds of meters deep in the Gulf of Mexico were incubated at low temperatures (4 degrees C) and high hydrostatic pressure in steel vessels. Stimulation of indigenous microbial communities to SBF biodegradation was evident in the fact that the rate of removal of ethyl oleate was greater in sediments that had some previous exposure to SBF (first-order decay coefficient k of -0.22 +/- 0.02 week(-1)) compared to unexposed control sediments (first-order decay coefficient k of -0.11 +/- 0.02 week(-1)). When sulfate-linked tetradecene degradation occurred within the test period, the activity could also be modeled as a first-order decay following an initial lag phase, with an average decay coefficient of k = -0.05 +/- 0.01 week(-1). This study also revealed that the degradation of SBF surrogates by microorganisms collected from deep-sea sediments was not significantly effected by the hydrostatic incubation pressure.
机译：在这项研究中，采用厌氧性海洋生物降解性试验来研究深海微生物对合成基础液（SBF）替代物，油酸乙酯和十四碳的去向。将来自墨西哥湾数百米深的沉积物样品在低温（4摄氏度）和高静水压力下在钢制容器中孵育。事实是，在先前接触过SBF的沉积物中，油酸乙酯的去除率更高（一阶衰减系数k为-0.22 +/- 0.02周（-1） ））与未暴露的对照沉积物相比（一阶衰减系数k为-0.11 +/- 0.02周（-1））。当在测试期间发生硫酸盐相关的十四碳烯降解时，也可以将活性建模为初始滞后阶段后的一阶衰减，平均衰减系数为k = -0.05 +/- 0.01周（-1）。这项研究还表明，从深海沉积物中收集的微生物对SBF替代物的降解不受静水温育压力的影响。

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  • 来源
    《Environmental Science & Technology》 |2006年第18期|p. 5737-5742|共6页
  • 作者

    Nguyen AH; Herman D; Roberts DJ;

  • 作者单位

    Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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