PERSISTANCE OF NAPL CONTAMINANTS IN NATURAL SUBSURFACE SYSTEMS

NAPL 污染物在天然地下系统中的持久性

• 批准号: 6217612
• 负责人: LINDA M ABRIOLA
• 金额: $ 15.1万
• 依托单位: MICHIGAN STATE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2000-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6217612
• 关键词: adsorption; benzene; biotransformation; carbopolycyclic compound; chemical kinetics; computer simulation; cycloalkene; environmental contamination; environmental engineering; environmental transport; fluidity; ground water; hydropathy; mathematical model; nonwater solvent; phase change; soil pollution; soil sampling; toluene; water solution

Nonaqueous phase organic liquids are widespread contaminants of subsurface soils and groundwater. From a human health perspective, these organic liquids are of particular concern because they tend to represent long-term sources of pollution and create diverse and persistent pathways for eventual human exposure. The work proposed in this project is directed towards the investigation of processes which influence the entrapment, persistence, transport, bioavailability, and toxicity of organic liquid components in the natural subsurface environment. It represents a fundamental research program which builds upon previous and current NIEHS-funded projects and integrates laboratory and mathematical modeling investigations. Subproject A focuses on the behavior of benzene, toluene, xylene (BTX) and chlorinated solvent compounds. Its specific aims relate to the investigation of the influence of physical and chemical heterogeneities on organic liquid entrapment and mass transfer, and the quantification of the influence of multiple, coupled processes on contaminant fate and transport. Special attention will be directed to the elucidation of microbial processes through close collaboration with Project 1 investigators. Thus, the work proposed is designed to logically extend the knowledge gained in previous NIEHS- funded projects to consider the interaction of multiple processes, the influence of chemical and physical heterogeneities on these processes, and the behavior and fate of complex NAPL mixtures. Although directed primarily at the investigation of naturally occurring attenuation processes, the knowledge gained from these studies will have immediate applications to the design of more effective remediation strategies.

非水相有机液体是广泛的污染物 地下土壤和地下水。 从人类健康的角度来看 有机液体特别关心，因为它们倾向于代表 污染的长期来源，创造多样化和持久的途径 最终的人类接触。 该项目提出的工作是 致力于调查影响 夹杂，持久性，运输，生物利用度和毒性 自然地下环境中的有机液体成分。 它 代表了一个基本研究计划，该计划基于以前的和 当前的NIEHS资助项目并整合了实验室和数学 建模研究。 subproject a的重点是 苯，甲苯，二甲苯（BTX）和氯化溶剂化合物。 它是 具体目的与调查物理的影响有关 和有机液体夹带和质量的化学异质性 转移，以及多个耦合的影响的量化 污染物命运和运输的过程。 特别关注 通过关闭来阐明微生物过程 与项目1调查人员的合作。 因此，提出的工作是 旨在从逻辑上扩展以前的Niehs-获得的知识 资助的项目以考虑多个过程的相互作用， 化学和物理异质性对这些过程的影响， 以及复杂的NAPL混合物的行为和命运。 虽然指导 主要是在调查自然衰减的情况下 过程，从这些研究中获得的知识将立即 适用于设计更有效的补救策略的应用。