Effect of solvents on the photodegradation rates of octachlorodibenzo-p-dioxin

The effects on octachlorodibenzo-p-dioxin (OCDD) photolysis rate and products by different solvents were studied. OCDD may be able to photolytically degrade into more toxic CDDs. The rate of OCDD photolysis was found to be greatly affected by the solvent medium in the 295-340 nm region. Solvent mixt...

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Veröffentlicht in:	Bulletin of environmental contamination and toxicology 1990-03, Vol.44 (3), p.380-386
Hauptverfasser:	Hung, L S, Ingram, Jr, L L
Format:	Artikel
Sprache:	eng
Schlagworte:	ALKALI METAL COMPOUNDS AROMATICS BENZOFURANS BIODEGRADATION CHEMICAL REACTIONS Chemistry CHLORINATED AROMATIC HYDROCARBONS Chlorophenols - analysis CHROMATES CHROMIUM COMPOUNDS contaminantes DECOMPOSITION DIOXIN Dioxins - analysis Exact sciences and technology FURANS General and physical chemistry Half-Life HALOGENATED AROMATIC HYDROCARBONS HETEROCYCLIC COMPOUNDS HYDROXY COMPOUNDS Mass Spectrometry ORGANIC CHLORINE COMPOUNDS ORGANIC COMPOUNDS ORGANIC HALOGEN COMPOUNDS ORGANIC OXYGEN COMPOUNDS OXYGEN COMPOUNDS Pentachlorophenol - analysis PHENOLS PHOTOCHEMICAL REACTIONS Photochemistry PHOTOLYSIS Physical chemistry of induced reactions (with radiations, particles and ultrasonics) polluant pollutants Polychlorinated Dibenzodioxins - analogs & derivatives Polychlorinated Dibenzodioxins - analysis POTASSIUM COMPOUNDS produit de preservation du bois RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT solvant solvente SOLVENTS substancias de conserv de la madera TRANSITION ELEMENT COMPOUNDS 560300 > Chemicals Metabolism & Toxicology Ultrasonics wood preservatives
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Zusammenfassung:	The effects on octachlorodibenzo-p-dioxin (OCDD) photolysis rate and products by different solvents were studied. OCDD may be able to photolytically degrade into more toxic CDDs. The rate of OCDD photolysis was found to be greatly affected by the solvent medium in the 295-340 nm region. Solvent mixtures used included: cyclohexadiene/hexane, triethylamine/hexane, cyclohexene/hexane, hexane, benzene/hexane, benzophenone/hexane, benzene, and acetonitrile/water. Solvents that are good hydrogen donors correlated with shorter photolysis times. Heptachlorodibenzo-p-dioxin was the preferred isomer of all solvent mixtures except those with 1,3-cyclohexadine.
ISSN:	0007-4861 1432-0800
DOI:	10.1007/BF01701219