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: 5211160
• 负责人: LINDA M ABRIOLA
• 金额: --
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/5211160
• 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存在的污染物 地下土壤和地下水。 从人类健康的角度来看，这些 有机液体受到特别关注，因为它们往往代表 长期污染源并创造多样化和持久的途径 用于最终的人体暴露。 该项目建议的工作是 旨在调查影响的过程 的截留、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 代表了一项基础研究计划，该计划建立在以前和 当前 NIEHS 资助的项目，整合了实验室和数学 建模调查。 子项目 A 重点关注 苯、甲苯、二甲苯 (BTX) 和氯化溶剂化合物。 它是 具体目标涉及物理影响的调查 有机液体截留和质量的化学异质性 转移，以及多重耦合影响的量化 污染物归宿和迁移的过程。 将会特别关注 旨在通过近距离阐明微生物过程 与项目 1 研究人员合作。 因此，建议的工作是 旨在逻辑地扩展之前 NIEHS 中获得的知识 资助的项目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 NAPL 混合物的行为和命运。 虽然被导演 主要用于研究自然发生的衰减 过程中，从这些研究中获得的知识将立即发挥作用 应用到设计更有效的修复策略。