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: 8053925
• 负责人: Dibakar Bhattacharyya
• 金额: $ 24.39万
• 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/8053925
• 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; 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; dechlorination; diphenyl; enzyme immobilization; flexibility; gluconate; glucose oxidase; improved; innovation; membrane assembly; nanoparticle; nanosized; nanostructured; novel strategies; operation; organic acid; oxidation; particle; pollutant; reaction rate; remediation; 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.

氯代有机物从水、土壤和沉积物中带来毒性，并产生累积， 对环境的有害影响。各种超级基金站点含有RGBs，氯乙烯， 和其它化合物。氯代有机物降解为无毒、无氯、易降解 生物可降解产品将需要涉及“结合”（还原和氧化）的综合方法 补救技术。我们提出的使用组合技术的方法应该会导致显著的 通过消除有机氯的生产来改进目前的补救做法 中间体的我们的研究将集中在选定的RGB，TCE和RGB混合物的降解。一 对两个步骤（还原和氧化）的反应动力学的透彻理解， 表面活性剂和材料（例如掺杂催化剂金属、螯合物）特性对于本发明将是重要的。 步骤的整合。本文介绍了纳米颗粒对氯离子的还原脱氯方法， 聚合物介质和纳米管将允许开发高度可控的结构，以实现高反应性 与稳定拟议中的技术将对纳米结构材料的作用产生重大影响 和羟基自由基/超氧阴离子自由基反应途径， 未来的需要。该技术用于潜在的现场产生过氧化氢和葡萄糖酸（铁 螯合物）提供酶（葡萄糖氧化酶）固定化，其使用逐层的创新方法 组装膜，这将增加在各种超级基金网站的应用机会。 氧化和还原系统的动力学建模应该为以下方面建立良好的基础： 对基于纳米技术的系统和螯合物修饰的 羟基/超氧化物自由基为基础的反应。这项建议的另一个重要方面是， 对于脱氯步骤和组合的反应系统，毒性将显著降低。 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，大幅减少材料使用， 通过降低毒性大大改善健康益处。