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

氯化有机物从水、土壤和沉积物三个阶段带来毒性，并产生累积， 对环境的有害影响。不同的超级基金站点包含RGB、氯乙烯、 和其他化合物。将含氯有机物降解为无毒、无氯化、易降解 生物可降解产品将需要“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带来显著的 通过消除氯代有机化合物的生产改进目前的补救做法 中间体。我们的研究将集中在选定的RGB、TCE和RGB混合物的降解上。一个 深入了解两个步骤(还原和氧化)的反应动力学，潜在的作用 表面活性剂和材料(如掺杂催化剂金属、络合物)的特性将对 步骤的整合。双金属纳米颗粒还原脱氯的研究进展 聚合物介质和纳米管将允许开发高度可控的结构，以实现高活性 和稳定性。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/超氧阴离子反应途径在环境领域的当前和 未来的需求。潜在的现场产生过氧化氢和葡萄糖酸(铁)的技术 螯合物)使用一种创新的逐层方法提供酶(葡萄糖氧化酶)固定化 组装的膜，这应该会增加Superfund在各个地点的应用机会。 氧化和还原体系的动力学建模应为 基本了解基于双金属纳米技术的体系和用于络合修饰 羟基/超氧阴离子自由基反应。这项提议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，显著减少材料使用量，以及 通过降低毒性，极大地提高了健康效益。

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.