SGER: Degradation of Toxaphene by Zero-Valent Iron and Modified Iron Surfaces

SGER：零价铁和改性铁表面降解毒杀芬

• 批准号: 0455434
• 负责人: Clayton Clark
• 金额: $ 1.4万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0455434&HistoricalAwards=false
• 关键词: SGER; Degradation; Toxaphene; Zero; Valent

This research focuses on the examination and application of modified substrates including zero-valent iron to degrade toxaphene contamination found in the environment. The chemical compound toxaphene is a pesticide that has been found to pose significant risks to both humans and the environmental ecosystem. Due to its once widespread use and its tendency to persist in the environment, this chlorinated organic mixture has become a contaminant of major concern for environmental engineers and scientists. The intellectual merits of this proposed study include the gathering of information regarding the degradation rates of toxaphene in contact with the zero-valent iron and modified iron substrates, the adsorption/partitioning coefficients of toxaphene with relation to these solid substrates, the potential pathways of toxaphene dechlorination, how modification of the substrates affect the dechlorination of toxaphene, and the potential rate limiting factors for this data. The proposed experimentation includes batch and kinetic laboratory studies and evaluation by gas chromatographic analysis. In addition, the negligible power requirements and the low cost of iron potentially make this technique very advantageous to the environmental clean-up industry. The broader impact of this study is that it would also be used to attract and broaden the diversity of those participating in such research by providing a summer research opportunity for a high school junior or senior from an underrepresented group to help work on the proposed research. The data provided by this research funded by the SGER would show the feasibility for applying this research beyond the initially explored compound, toxaphene, and potentially beyond the laboratory-based experiments for future field application.

本文主要研究包括零价铁在内的改性底物降解环境中毒杀芬污染的研究与应用。化学化合物毒杀芬是一种杀虫剂，已被发现对人类和环境生态系统都构成重大风险。由于它的广泛使用和在环境中持续存在的趋势，这种氯化有机混合物已成为环境工程师和科学家主要关注的污染物。本研究的知识价值包括收集有关接触零价铁和改性铁底物时毒杀芬的降解速率、毒杀芬与这些固体底物的吸附/分配系数、毒杀芬脱氯的潜在途径、底物的改性如何影响毒杀芬的脱氯以及该数据的潜在速率限制因素的信息。建议的实验包括批处理和动力学实验室研究以及气相色谱分析评价。此外，可忽略不计的电力需求和低成本的铁可能使这种技术非常有利于环境清理行业。这项研究的更广泛的影响是，它也将被用来吸引和扩大那些参与这种研究的多样性，通过提供一个暑期研究机会，从一个代表性不足的群体的高中三年级或高年级，以帮助工作提出的研究。由SGER资助的这项研究提供的数据将表明，除了最初探索的化合物毒虫芬之外，这项研究还可以应用于未来的现场应用，并有可能超出实验室实验的范围。