现场生物降解:受污染的含水层中的微生物模式
E L Madsen1, J L Sinclair, W C Ghiorse
1Section of Microbiology, Cornell University, Ithaca, NY 14853.
Science (New York, N.Y.)
|May 10, 1991
概括
这项研究表明,多芳香碳化合物 (PAH) 在含水层中的有效现场生物降解. 对微生物数据的分析证实了微生物在受污染区域的适应和生长,验证了环境评估的新方法.
科学领域:
- 环境微生物学 环境微生物学
- 水上地球化学 水上地球化学
- 生物修复科学 生物修复科学
背景情况:
- 检测水表中的有机污染物的现场生物降解的传统方法是有限的.
- 埋藏的煤焦油站点在评估污染物的自然减弱方面存在复杂的挑战.
- 多芳香碳化合物 (PAH) 是持久性有机污染物,需要有效的监测策略.
研究的目的:
- 开发和验证一种全面的方法,以证明水层中的有机污染物的现场生物降解.
- 分析微生物活动和分布数据以推断生物降解过程.
- 为了证明微生物适应和生长,以应对PAH污染.
主要方法:
- 从含水层钻井中在一致的深度收集沉积物样本,穿过污染物梯度.
- 分析了微生物活动和分布的综合数据集.
- 评估了纳夫他林和氨酸的矿化.
- 量化原生动物和细菌种群以表明生长.
主要成果:
- 在受污染的区域中通过纳夫他林和的矿化证明了微生物对多芳香碳化合物的适应性.
- 仅在受污染的地下样本中观察到原生动物及其细菌猎物的数量增加,这表明受污染物刺激的细菌生长.
- 提供了支持in situ生物降解的间接证据的融合线.
结论:
- 微生物学数据的全面分析有效地记录了水表污染物的现场生物降解.
- 这种基于间接证据的方法克服了证明生物降解的传统方法的局限性.
- 这些发现支持了受污染的含水层中PAHs自然减弱的潜力.
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