• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Geophysical Signatures of Microbial Activity at Hydrocarbon Contaminated Sites: A Review
【24h】

Geophysical Signatures of Microbial Activity at Hydrocarbon Contaminated Sites: A Review

机译：碳氢化合物污染地点微生物活动的地球物理特征：综述

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Microorganisms participate in a variety of geologic processes that alter the chemical and physical properties of their environment. Understanding the geophysical signatures of microbial activity in the environment has resulted in the development of a new sub-discipline in geophysics called "biogeophysics". This review focuses primarily on literature pertaining to biogeophysical signatures of sites contaminated by light non-aqueous phase liquids (LNAPL), as these sites provide ideal laboratories for investigating microbial-geophysical relationships. We discuss the spatial distribution and partitioning of LNAPL into different phases because the physical, chemical, and biological alteration of LNAPL and the subsequent impact to the contaminated environment is in large part due to its distribution. We examine the geophysical responses at contaminated sites over short time frames of weeks to several years when the alteration of the LNAPL by microbial activity has not occurred to a significant extent, and over the long-term of several years to decades, when significant microbial degradation of the LNAPL has occurred. A review of the literature suggests that microbial processes profoundly alter the contaminated environment causing marked changes in the petrophysical properties, mineralogy, solute concentration of pore fluids, and temperature. A variety of geophysical techniques such as electrical resistivity, induced polarization, electromagnetic induction, ground penetrating radar, and self potential are capable of defining the contaminated zones because of the new physical properties imparted by microbial processes. The changes in the physical properties of the contaminated environment vary spatially because microbial processes are controlled by the spatial distribution of the contaminant. Geophysical studies must consider the spatial variations in the physical properties during survey design, data analysis, and interpretation. Geophysical data interpretation from surveys conducted at LNAPL-contaminated sites without a microbial and geochemical context may lead to ambiguous conclusions.
机译：微生物参与改变其环境化学和物理性质的各种地质​​过程。对环境中微生物活动的地球物理特征的了解导致了地球物理领域一个新的子学科的发展，该学科被称为“生物地球物理学”。这篇综述主要关注与轻非水相液体（LNAPL）污染的站点有关的生物地球物理特征的文献，因为这些站点为研究微生物-地球物理关系提供了理想的实验室。我们讨论LNAPL的空间分布和划分为不同的阶段，因为LNAPL的物理，化学和生物学变化以及对污染环境的后续影响在很大程度上是由于其分布。当微生物活动未对LNAPL产生重大影响时，我们会在短短的几周至几年的时间内检查受污染地点的地球物理响应，而在数年至数十年的长期中，当微生物发生重大降解时，我们会对其进行地球物理响应LNAPL发生。文献综述表明，微生物过程会深刻改变受污染的环境，从而导致岩石物理特性，矿物学，孔隙流体的溶质浓度和温度发生明显变化。由于微生物过程赋予了新的物理特性，因此各种地球物理技术（例如电阻率，感应极化，电磁感应，探地雷达和自电势）能够确定受污染区域。受污染环境的物理特性的变化在空间上变化，因为微生物过程受污染物的空间分布控制。地球物理研究必须在勘测设计，数据分析和解释过程中考虑物理性质的空间变化。在没有微生物和地球化学背景的情况下，在受LNAPL污染的地点进行的调查中对地球物理数据的解释可能会导致模棱两可的结论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号