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

SGER：沉积物修复的关键：DEHALORESPIRERS 和可能的自然生态位

• 批准号: 0541900
• 负责人: Paige Novak
• 金额: --
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-15 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0541900&HistoricalAwards=false
• 关键词: SGER; KEY; SEDIMENT; REMEDIATION; DEHALORESPIRERS

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.

0541900诺瓦克鉴于美国污染沉积物的成本极高，无论是在人类和生态健康方面，还是在美元方面，研究低成本的补救方法至关重要。虽然原位生物修复是有前途的，一个主要的挑战，仍然是如何有效地刺激本地dehalorespirers在有限的生物利用度的吸附污染物的存在。向污染沉积物中添加替代性电子受体能够成功地刺激这些生物的生长，促进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具有毒性和/或生物累积性，因此无法在环境中使用。有证据表明，天然替代电子受体的脱卤呼吸存在。拟议的研究旨在检验这一假设，即dehalorespirers是未受污染的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。拟议的研究旨在检验这一假设，即dehalorespirers是未受污染的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。