SGER: A KEY TO SEDIMENT REMEDIATION: DEHALORESPIRERS AND A POSSIBLE NATURAL NICHE

0541900 11月鉴于美国与受污染的沉积物相关的成本极高，无论是在人类健康和生态健康方面，还是在美元方面，研究低成本的修复方法都至关重要。尽管就地生物修复很有希望，但仍然存在的一个主要挑战是，如何在生物利用度有限的吸附污染物存在的情况下有效地刺激土著脱盐呼吸器。在受污染的沉积物中添加替代电子受体能够成功地刺激这些生物的生长，鼓励风化污染物的解吸和降解。迄今为止使用的替代电子受体也是有毒和/或生物累积的，排除了它们在环境中的使用。有证据表明，脱卤素呼吸器的天然电子受体是存在的。这项拟议的研究旨在检验这样一种假设，即脱卤素呼吸器是未受污染的生态系统的自然组成部分，其利基是来自腐殖化植物材料的天然氯化有机化合物的呼吸作用。这项拟议的研究旨在检验这样一种假设，即脱卤素呼吸器是未受污染生态系统的自然组成部分，其生态位是来自腐殖化植物材料的天然氯化有机化合物的呼吸作用。

0541900 NovakGiven the extremely high cost associated with contaminated sediments in the US, both in terms of human and ecological health and in terms of dollars, research on low-cost methods of remediation is of critical importance. Although in situ bioremediation is promising, one major challenge that remains is how to effectively stimulate indigenous dehalorespirers in the presence of sorbed contaminants of limited bioavailability. The addition of alternative electron acceptors to contaminated sediment is able to successfullystimulate the growth of these organisms, encouraging the desorption and degradation of weathered contaminants. Alternative electron acceptors used to date have also been toxic and/or bioaccumulative, precluding their use in the environment. There is evidence that natural alternative electron acceptors for dehalorespirers exist. The proposed research is designed to test the hypothesis that dehalorespirers are a natural component of uncontaminated ecosystems, where their niche is the respiration of natural chlorinated organic compounds derived from humifying plant material. The proposed research is designed to test the hypothesis that dehalorespirers are a natural component of uncontaminated ecosystems where their niche is the respiration of natural chlorinated organic compounds derived from humifying plant material.