Evaluation of Highly Stable Anode Materials for Electrochemical Oxidation of Contaminants in Water

摘要提案标题：硼掺杂金刚石膜和半导体二氧化钛作为阳极焚烧废水中有机化合物的稳定电极提案编号：CTS-0522790主要研究者： James Farrell机构： 亚利桑那大学分析（决策依据）：本研究的目标是研究新型阳极材料电化学氧化水中有机污染物的有效性。电化学水处理通过以下方式从水中去除有机污染物：1）在阳极表面处的直接氧化; 2）通过由水氧化产生的羟基自由基、臭氧和过氧化氢的间接氧化;以及3）通过由电解质的氧化产生的反应性物质的间接氧化，例如在含有氯离子和硫酸根离子的沃茨的次氯酸盐。电化学水处理可用于将有机污染物完全氧化成二氧化碳和水，或者可用于将有毒和/或不可生物降解的化合物部分氧化成无毒或可生物降解的化合物。本研究的总体目标是调查硼掺杂二氧化钛，“还原”二氧化钛，和掺铌金红石电极氧化氟化表面活性剂，长期以来一直用于家用产品和电子制造中使用的高纯度化学品的有效性。 这些电极将在以下方面进行评估：1）水氧化的反应速率和产物; 2）浓度、电极电位和溶液pH值的影响; 3）特定有机化合物氧化速率; 4）水处理条件下的长期稳定性。 一系列广泛的教育影响将在针对研究生和本科生的提案中得到解决，特别是来自代表性不足的少数民族的学生。一些指导方案已经到位，并已显示出良好的效果。 改善水净化对环境恢复和制造业都具有强大的社会影响，特别是在半导体行业。 研究还预计，与其他行业有关的可持续性问题也将取得长期进展。

AbstractProposal Title: Boron Doped Diamond Films and Semiconducting Titanium Dioxide as Stable Electrodes for Anodic Incineration of Organic Compound in Wastewater Proposal Number: CTS-0522790Principal Investigator: James FarrellInstitution: University of Arizona Analysis (rationale for decision):The goal of this research is to investigate the effectiveness of novel anode materials for electrochemically oxidizing organic contaminants in water. Electrochemical water treatment removes organic contaminants from water by: 1) direct oxidation at the anode surface; 2) indirect oxidation by hydroxyl radicals, ozone and hydrogen peroxide produced from water oxidation; and 3) indirect oxidation by reactive species produced from oxidation of the electrolyte, such as hypochlorite in waters containing chloride and sulfate ions. Electrochemical water treatment can be used to completely oxidize organic contaminants into carbon dioxide and water, or can be used to partially oxidize toxic and/or nonbiodegradable compounds into nontoxic or biodegradable ones. The overall objective of this research is to investigate the effectiveness of boron doped titania, "reduced" titania, and nobium-doped rutile electrodes for oxidation of fluorinated surfactants, which have long been used in household products and in high purity chemicals used in electronics manufacturing. These electrodes will be evaluated in terms of: 1) reaction rates and products for water oxidation; 2) effects of concentration, electrode potential, and solution pH; 3) specific organic compound oxidation rates; and 4) long-term stability under water treatment conditions. A broad range of education impacts will be addressed in the proposal for graduate and undergraduate students, especially from under-represented minorities. Several mentoring programs are already in place and have demonstrated excellent results. Improved water decontamination has strong societal impacts for both environmental restoration and manufacturing, especially in the semiconductor industry. Long-term progress on sustainability issues related to other industries is also anticipated from the research.