Project 7: Chloro-Organic Degradation by Nanosized Metallic Systems and by Chelat

项目 7：纳米金属系统和 Chelat 降解氯有机物

• 批准号: 8249964
• 负责人: Dibakar Bhattacharyya
• 金额: $ 24.23万
• 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/8249964
• 关键词: Advanced Development; Anions; Carbon; Characteristics; Chelating Agents; Chemicals; Chlorine; Development; Educational workshop; Effectiveness; Environment; Enzymes; Equilibrium; Flushing; Foundations; Free Radicals; Future; Generations; Glucose; Health Benefit; Hydrogen; Hydrogen Peroxide; Hydroxyl Radical; Immobilization; In Situ; Iron; Iron Chelating Agents; Kinetics; Lead; Life; Maps; Membrane; Metals; Methods; Modeling; Monitor; Morphology; Nanostructures; Nanotechnology; Nanotubes; National Institute of Environmental Health Sciences; Natural regeneration; Parents; Pathway interactions; Phase; Phenols; Pollution; Polychlorinated Biphenyls; Polymers; Production; Property; Reaction; Reagent; Research; Roentgen Rays; Role; Salts; Sampling; Site; Soil; Solvents; Spectrum Analysis; Structure; Superoxides; Surface; System; Techniques; Technology; Testing; Toxic effect; Trichloroethylene; Vascular Endothelial Cell; Vinyl Chloride; Water; Work; base; biodegradable product; catalyst; cost effective; dechlorination; diphenyl; enzyme immobilization; flexibility; gluconate; glucose oxidase; improved; innovation; membrane assembly; nanoparticle; nanosized; nanostructured; novel strategies; nutrition; operation; organic acid; oxidation; particle; pollutant; reaction rate; remediation; superfund chemical; superfund site; surfactant; technology development

Chlorinated organics bring toxicity from water, soil, and sediment phases, and exert a cumulative, deleterious effect on the environment. Various Superfund sites contain mixtures of RGBs, chloroethylenes, and other compounds. The degradation of of chloro-organics to nontoxic, non-chlorinated, and easily biodegradable products will require integrated approaches involving "combined" (reductive and oxidative) remediation technologies. Our proposed approach to use combined technologies should lead to significant improvement over current remediation practices by the elimination of the production of chloro-organic intermediates. Our research will focus on the degradation of selected RGBs, TCE, and RGB mixtures. A thorough understanding of the reaction kinetics for both steps (reductive and oxidative), the potential role of surfactants, and material (such as doping catalyst metals, chelates) characteristics will be important for the integration of the steps. The approaches taken for reductive dechlorination by bimetallic nanoparticles in polymer media and nanotubes will allow the development of highly controlled structures for high reactivity and stability. The proposed technology will have a significant impact on the role of nanostructured materials and hydroxyl radical /superoxide radical anion reaction pathway in the environmental field for current and future needs. The technique for potential on-site generation of hydrogen peroxide and gluconic acid (iron chelate) provides enzyme (glucose oxidase) immobilization using an innovative approach of layer- by-layer assembled membranes, and this should enhance application opportunities in various Superfund sites. Kinetic modeling of both oxidative and reductive systems should establish an excellent foundation for fundamental understanding of bimetallic nanotechnology-based systems and for chelate-modified hydroxyl/superoxide radical-based reactions. Another important aspect of this proposal is that pollutant toxicity will be reduced significantly for both the dechlorination step and the combined reaction systems. Relevance: The proposed research is expected to have significant positive impact on pollution remediation through flexible dechlorination technology developments with significant reduction of material usage, and highly improved health benefits through toxicity reduction.

氯化有机物从水、土壤和沉积物相中带来毒性，并产生累积、 对环境造成有害影响。各种超级基金网站都含有 RGB、氯乙烯、 和其他化合物。将含氯有机物降解为无毒、非氯化、易降解的 可生物降解的产品将需要涉及“组合”（还原和氧化）的综合方法 修复技术。我们提出的使用组合技术的方法应该会带来重大的成果 通过消除有机氯的产生来改进当前的修复实践 中间体。我们的研究将集中于选定的 RGB、TCE 和 RGB 混合物的降解。一个 彻底了解两个步骤（还原和氧化）的反应动力学， 表面活性剂和材料（例如掺杂催化剂金属、螯合物）特性对于 步骤的整合。双金属纳米粒子还原脱氯的方法 聚合物介质和纳米管将允许开发高度控制的结构以实现高反应性 和稳定性。所提出的技术将对纳米结构材料的作用产生重大影响 以及当前和环境领域中羟自由基/超氧自由基阴离子反应途径 未来的需要。潜在现场产生过氧化氢和葡萄糖酸（铁）的技术 螯合物）使用创新的逐层方法提供酶（葡萄糖氧化酶）固定化 组装膜，这应该会增加在各个超级基金站点的应用机会。 氧化和还原系统的动力学模型应该为以下方面奠定良好的基础： 对基于双金属纳米技术的系统和螯合物改性的基本了解 基于羟基/超氧自由基的反应。该提案的另一个重要方面是污染物 脱氯步骤和组合反应系统的毒性都将显着降低。 相关性：拟议的研究预计将对污染修复产生重大积极影响 通过灵活的脱氯技术开发，显着减少材料的使用，以及 通过减少毒性大大提高健康效益。