Chloro-Organic Degradation by Polymer Membrane Immobilized Iron-Based Particle Sy

聚合物膜固定铁基颗粒系统降解氯有机物

• 批准号: 8649942
• 负责人: Dibakar Bhattacharyya
• 金额: $ 30.56万
• 依托单位: UNIVERSITY OF KENTUCKY
• 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/8649942
• 关键词: Address; Adsorption; Aftercare; Attention; Benign; Biological Sciences; Carbon; Chemicals; Chemistry; Chlorine; Collaborations; Development; Diffusion; Drug Metabolic Detoxication; Engineering; Environment; Environmental Health; Free Radicals; Funding; Generations; Health; Heating; High temperature of physical object; Human; Hydrogen Peroxide; Hydroxyl Radical; Individual; Inflammatory; Iron; Kentucky; Knowledge; Laboratories; Laboratory Research; Lead; Ligands; Manufacturer Name; Medical; Membrane; Metals; Methods; Modeling; Mono-S; Nature; Outcome Study; Palladium; Pathway interactions; Phase; Plants; Poison; Polychlorinated Biphenyls; Polymers; Production; Public Health; Reaction; Relative (related person); Research; Risk; Risk Management; Science; Scientist; Site; Soil; Solutions; Solvents; Source; Structure; Superfund; System; Techniques; Technology; Temperature; Testing; Toxic effect; Toxicity Tests; Translational Research; Trichloroethylene; United States Environmental Protection Agency; Vinyl Chloride; Water; Work; base; chemical stability; cost effective; dechlorination; demineralization; design; drinking; drinking water; global environment; hazard; innovation; iron oxide; metal oxide; microbial; nanoparticle; nanoscale; nanosized; nanostructured; novel; nutrition; oxidation; particle; pollutant; prevent; remediation; scaffold; sensor; superfund chemical; superfund site; treatment strategy

PROJECT SUMMARY (Project 5 - Bhattacharyya, Ormsbee) Due to their relative chemical stability and ubiquitous nature, chlorinated organic compounds such as polychlorinated biphenyls (PCBs) and trichloroethylene (TCE) continue to pose both remediation challenges and human health risks. At many Superfund sites, past remediation efforts using traditional treatment strategies (e.g., reactive barriers, six phase heating, etc.) have proven to be highly costly and largely ineffective. Alternative strategies include both reductive and oxidative pathways for chloro-organic degradation to non-toxic compounds. The development of nanosized iron-based materials has brought important and promising techniques into the field of environmental remediation. In recent years, zero-valent nanoscale metal (especially iron) particles have attracted growing attention in groundwater remediation of chlorinated solvents. For more rapid and complete reductive dechlorination, a second metal is often added, resulting in bimetallic nanoparticles. In the past, utilization of such approaches at actual Superfund sites has been limited due to concerns about particle agglomeration or release into the environment. Project 5 will address the need for targeted remediation strategies by developing integrated, cost-effective technologies which incorporate both reductive and oxidative strategies in order to allow the complete remediation of chlorinated organic compounds without the production of toxic byproducts Three specific aims are to: 1) create a porous, common polymer membrane immobilized platform for synthesis of reactive and stable iron-based nanoparticles using environmentally safe approaches to prevent aggregation and loss of particles; 2) embed immobilized nanoparticles in responsive membrane domain to allow highly effective PCB and TCE dechlorination by both reductive and oxidative approaches; 3) determine whether PCB demineralization with reduction by bimetallic (iron and palladium) nanoparticles as a first step, followed by oxidation with iron oxide nanoparticles immobilized in polymer membrane domain, will eliminate the formation of toxic chlorine-substituted intermediates, as verified by toxicity tests. To accomplish the aims, a polymer/ membrane platform will be developed in both lab scale and full-scale for environmentally benign nanostructured iron synthesis, and individual and combined technology strategies will be established to reduce the toxicity of chloro-organics (selected PCBs and chloroethylenes). The proposed approach should address the agglomeration and toxicity concerns associated with the use of bimetallic nanoparticles and allow for the complete breakdown of chlorinated organic compounds to nontoxic and biodegradable intermediates. The project will include collaborations with the U.S. Environmental Protection Agency's (EPA's) National Risk Management Research Laboratory focused on nanoparticle synthesis and characterization using EPA facilities. As in the past, the project will work with diverse primary stakeholders at state and federal levels to implement the developed technologies at the Paducah Gaseous Diffusion Plant, Kentucky largest Superfund site.

项目摘要（项目5 -Bhattacharyya，Ormsbee） 由于它们的相对化学稳定性和无处不在的性质，氯有机化合物，例如 多氯联苯（PCB）和三氯乙烯（TCE）继续构成补救挑战，并且 人类健康风险。在许多超级基金地点，过去使用传统治疗策略（例如， 事实证明，反应性屏障，六个相供暖等）已被证明高昂且在很大程度上无效。选择 策略包括氯 - 有机降解为无毒的还原性和氧化途径 化合物。纳米基材料的开发带来了重要而有希望的 进入环境修复领域的技术。近年来，零价纳米级金属（尤其是 铁）颗粒吸引了越来越多的氯化溶剂的地下水修复。更多 快速而完全的还原脱氯，通常会添加第二种金属，从而导致双金属纳米颗粒。 过去，由于担心 粒子聚集或释放到环境中。项目5将满足目标补救的需求 通过开发综合，具有成本效益的技术来融合还原性和氧化的策略 策略以允许对氯化有机化合物进行完全修复，而无需产生 有毒副产品三个特定的目的是：1）创建一个固定的多孔，常见的聚合物膜 使用环境安全的方法合成反应性和稳定的基于铁的纳米颗粒的平台 防止聚集和损失颗粒； 2）将固定的纳米颗粒嵌入响应膜结构域中 通过还原和氧化方法允许高效的PCB和TCE脱氯。 3）确定 在第一步 然后用固定在聚合物膜结构域中的氧化铁纳米颗粒氧化将消除 通过毒性测试证实，有毒氯取代的中间体的形成。为了实现目标， 聚合物/膜平台将以实验室规模和全尺度开发，以供环境良性 将建立纳米结构的铁合成以及个人和组合的技术策略以减少 氯化物质的毒性（选定的PCB和氯乙烯）。拟议的方法应解决 与使用双金属纳米颗粒有关的凝聚和毒性问题，并允许 将氯化有机化合物完全分解为无毒和可生物降解的中间体。这 项目将包括与美国环境保护署（EPA）国家风险的合作 管理研究实验室专注于使用EPA设施进行纳米颗粒的合成和表征。 与过去一样，该项目将与州和联邦一级的不同主要利益相关者合作，以实施 在肯塔基州最大的超级基金站点的帕迪卡气态扩散厂开发的技术。