Non-aromatic halogenated compounds

The free-radical chemistry of this class of compound has been the subject of study by radiation chemists (c/. [11, 27-29]) ever since it was observed that they are reductively dehalogenated by electron attachment. 

In the case of the above-mentioned solutes (especially of the tri- and tetrachloroethylenes where the annual industrial production runs into the 

In the abatement of aromatic pollutants, the main initial transient species is the substrate-OH-radical adduct, hydroxycyclohexadienyl. Depending on the nature of the substituents in the ring, the addition of dioxygen to these radicals may be reversible [34]. The behaviour of the hydroxycyclohexadienylperoxyl 

Treatment of aromatics with ionizing radiation in order to degrade them is not necessarily always entirely beneficial. Thus with an effluent that produces NO2 (which is especially the case in the treatment of aerosols), traces of nitro derivatives can be formed by free-radical recombination [cf. reactions (30)-(36), unpublished results]. These compounds are usually very resistant to biodegradation. 

Hydroxylated aromatics are simong the intermediates in the deep degradation of aromatic hydrocarbons. In addition, they form a class of pollutants of their own. Phenoxyl radicals are important intermediates in their oxidative oxidation. Some aspects of their degradation have been discussed from an environmental point of view [37-40], 

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