New Technologies for the Remediation

修复新技术

• 批准号: 7311852
• 负责人: Eric A Betterton
• 金额: $ 20.66万
• 依托单位: UNIVERSITY OF ARIZONA
• 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/7311852
• 关键词: bioreactors; environmental contamination; environmental toxicology; ground water; halocarbon compound; halogenation; hazardous substances; molecular weight; technology /technique development; trichloroethylene; waste treatment; water pollution

The "Halogenated Organics" project is proposing three Study Areas, each of which is related to the central theme of treating contaminated soil vapor and ground water with an emphasis on destruction of the target pollutant, rather than capture and disposal. We will focus mainly, although not exclusively, on methods for the destruction of perchloroethylene (PCE) and trichloroethylene (TCE), which have been the subject of extensive study in our laboratories, and which dominate the list of VOC contaminants at the nearby Park-Euclid State Superfund site, where we have worked for the past four years. This work is motivated by difficulties associated with destruction or final disposal of chlorinated solvents that are traditionally recovered from contaminated sites via pump-and-treat or soil-vapor-extraction (SVE) methods, which, in themselves, merely transfer contaminants from one medium to another. For example, when activated carbon absorption units become loaded with PCE the spent carbon itself becomes a hazardous waste and must be handled as such. Subsequent high-temperature incineration of the carbon may produce much more toxic contaminants such as dioxins and furans whose release to the atmosphere might pose an even greater health risk. With this in mind, the three Study Areas focus on chemically reducing or oxidizing gaseous or aqueous chlorinated organics using catalytic thermochemical or electrochemical techniques: 1) Catalyzed thermochemical destruction of gas phase VOCs, 2) electrolysis by advanced aqueous-phase and novel three-phase electrochemical reactors, and 3) fuel-cells for gas-phase contaminants. Each of the Study Areas will yield effluent streams with unknown, but hopefully lower, toxicity. In all cases, we intend capturing the effluent, even if it appears clean by chemical analysis (GC/ECD, FID, or MS), and subjecting it to toxicological analysis in the Biological Response Section of the Hazard Identification Core. Since all out pilot-scale work will continue to be done at the Park-Euclid field site there is a strong, and pervasive link to the Research Translation Core. This work is responsive to the call from a 1997 National Academies blue ribbon panel for the development of new destructive treatment technologies to help clean up the nation's long list of Superfund sites.

“卤化有机物”项目提出了三个研究领域，每个研究领域都与处理受污染的土壤蒸汽和地下水的中心主题有关，重点是破坏目标污染物，而不是捕获和处置。我们将主要关注，尽管不是唯一的，销毁过氯乙烯（PCE）和三氯乙烯（TCE）的方法，这是我们实验室广泛研究的主题，也是我们过去四年工作的附近公园-欧几里得国家超级基金遗址VOC污染物清单的主要内容。这项工作的动机是与氯化溶剂的破坏或最终处置有关的困难，氯化溶剂传统上通过泵处理或土壤蒸汽萃取（SVE）从污染场地回收。