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

摘要提案题目：硼掺杂金刚石薄膜和半导体二氧化钛作为废水中有机化合物阳极焚烧的稳定电极提案号：cts -0522790首席研究员：James farrell机构：亚利桑那大学分析（决策依据）：本研究的目的是研究新型阳极材料对电化学氧化水中有机污染物的有效性。电化学水处理通过：1)在阳极表面直接氧化去除水中的有机污染物；2)水氧化产生的羟基自由基、臭氧和过氧化氢间接氧化；3)由电解质氧化产生的活性物质间接氧化，如次氯酸盐在含有氯离子和硫酸盐离子的水中。电化学水处理可以将有机污染物完全氧化为二氧化碳和水，也可以将有毒和/或不可生物降解的化合物部分氧化为无毒或可生物降解的化合物。这项研究的总体目标是调查硼掺杂二氧化钛、“还原”二氧化钛和氮掺杂金红石电极氧化含氟表面活性剂的有效性，这些表面活性剂长期以来一直用于家用产品和电子制造业中使用的高纯度化学品。这些电极将根据以下方面进行评估：1)水氧化的反应速率和产物；2)浓度、电极电位、溶液pH的影响；3)有机化合物比氧化率；4)在水处理条件下的长期稳定性。该提案将对研究生和本科生，特别是来自代表性不足的少数民族的学生，提出广泛的教育影响。几个辅导项目已经到位，并显示出良好的效果。改善水去污对环境恢复和制造业，特别是半导体行业都有很强的社会影响。研究还期望在与其他行业相关的可持续性问题上取得长期进展。

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.