ENHANCED PHOTODEHALOGENATION OF HALOAROMATIC POLLUTANTS

大量的卤代芳香族化合物构成了主要的环境问题。 由于它们的毒性和耐降解性而造成的污染问题 自然资源。它们是通过各种不同的方式引入环境中的 路线--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或 例如，落叶剂。这项提案描述了一种新技术，它 将大大增强降解这些化合物的能力， 关注多氯联苯(PCBs)、多溴联苯 联苯(PBB)、氯化三苯、氯化二恶英 酚类和类似的卤代芳香族化合物。 对这些材料进行解毒的新技术依赖于一种 在氢化物供体在场的情况下进行的光化学脱卤化， 大大加快了脱卤化反应的速度。这个 提案旨在确立这一新方法的普遍效用，并 描述了通过系统地优化反应条件的步骤 改变氢化物的溶剂、浓度、温度和性质 消息来源。

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.