ENHANCED PHOTODEHALOGENATION OF HALOAROMATIC POLLUTANTS

卤代芳香族污染物的增强光脱卤

• 批准号: 3250882
• 负责人: GARY A EPLING
• 金额: $ 7.61万
• 依托单位: UNIVERSITY OF CONNECTICUT STORRS
• 依托单位国家: 美国
• 财政年份: 1984
• 资助国家: 美国
• 起止时间: 1984-12-01 至 1987-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3250882
• 关键词: chlorohydrocarbon; cyclic compound; dioxins; environmental contamination; environmental protection; halobiphenyl /halotriphenyl compound; halocarbon compound; halogenation; insecticides; phenols; photochemistry; radiotracer; solvents; temperature

A great number of halogenated aromatic compounds pose a major environmental pollution problem due to their toxicity and resistance to degradation by natural sources. These were introduced into the environment by a variety of routes--some intentionally, some by accident, and some as accidental contaminants in other compounds deliberately spread as insecticides or defoliants, for example. This proposal describes a new technique which will lead to a greatly enhanced ability to degrade these compounds, focusing attention on polychlorinated biphenyls (PCB's), polybrominated biphenyls (PBB's), chlorinated terphenyls, chlorinated dioxins, chlorinated phenols, and similar halogenated aromatic compounds. The new technique for detoxification of these materials relies on a photochemical dehalogenation, performed in the presence of hydride donors, which greatly accelerate the rate of the dehalogenation reaction. The proposal seeks to establish the general utility of this new method, and describes steps to optimize the reaction conditions by systematically varying the solvent, concentration, temperature, and nature of the hydride source.

大量的卤代芳香族化合物对环境造成了严重的污染， 由于它们的毒性和抗降解性，造成了污染问题 自然资源。 这些是由各种各样的 有些是故意的，有些是偶然的，有些是偶然的 其他化合物中的污染物故意作为杀虫剂传播， 例如脱叶剂。 该提案描述了一种新技术， 将导致大大增强的降解这些化合物的能力， 重点关注多氯联苯（PCB's）、多溴联苯 联苯（多溴联苯）、氯化三联苯、氯化二恶英、氯化 酚和类似的卤代芳族化合物。 对这些物质进行解毒的新技术依赖于一种 光化学脱卤，在氢化物供体存在下进行， 这大大加速了脱卤反应的速率。 的 建议旨在建立这种新方法的普遍效用， 描述了通过系统地优化反应条件的步骤 改变溶剂、浓度、温度和氢化物的性质 源头