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区域，每个研究区域都与处理污染的土壤蒸气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。我们将主要集中于毁灭高氯乙烯（PCE）和三氯乙烯（TCE）的方法，这些方法一直是我们实验室中广泛研究的主题，并在附近的公园 - 欧盟公园 - 欧亚人州立Superfund网站上占据了主导地位，在过去的四年中，我们已经在附近的公园 - 欧盟岛超级股票场所工作。这项工作是由与传统上通过泵和水分或土壤蒸气萃取（SVE）从受污染的地点恢复的氯化溶剂相关的困难或最终处置氯化溶剂（SVE）的动机。 方法本身只是将污染物从一种培养基传递到另一种介质。例如，当活化的碳吸收单元加载到PCE时，用过的碳本身就会成为危险的废物，必须这样处理。随后的碳的高温焚化可能会产生更多的毒性污染物，例如二恶英和呋喃，它们的释放到大气中可能会带来更大的健康风险。考虑到这一点，这三个研究领域侧重于使用催化热化学或电化学技术进行化学还原或氧化气态或水性氯化有机物：1）通过先进的水相和新型的三度电化剂和3燃料反应器和3）燃料反应器和3）燃料和3）燃料分解的气相VOC催化热化学破坏，2）催化。 每个研究区域都会产生未知但希望降低毒性的废水流。在所有情况下，我们都打算捕获废水，即使通过化学分析（GC/ECD，FID或MS）看起来很干净，并在危害识别核心的生物学反应部分中对其进行毒理学分析。由于所有淘汰的试点规模的工作将继续在公园 - 欧几里得田间进行，因此与研究翻译核心有着牢固而普遍的联系。 这项工作对1997年国家学院蓝带小组的呼吁做出了反应，以开发新的破坏性治疗技术，以帮助清理全国长期的超级基金网站。