Photolysis of highly chlorinated dibenzo-p-dioxins by sunlight

Dobbs, A.J.; Grant, C.

doi:10.1038/278163a0

Cited by 72 publications

(39 citation statements)

References 7 publications

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“…The great di erence may be indirect evidence about the assumption. Based on the photolytic half-live data determined by Dobbs and Grant (1979), Nestrick and Lamparski (1980) and Rappe (1991, 1992) developed a QSPR model for the photolytic half-lives of 11 PCDDs in organic solvents. Although the model is statistically signi®cant too, for the same reasons as stated above, we also consider the model is not theoretically sound.…”

Section: Resultsmentioning

confidence: 99%

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Quantitative structure–property relationships (QSPRs) on direct photolysis of PCDDs

Chen

Quan

Schramm³

et al. 2001

Chemosphere

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Section: Resultsmentioning

confidence: 99%

“…herbicides (2,4-D, 2,4,5-T), municipal waste incineration and all kinds of burning, metallurgical processes, and bleaching processes in the pulp and paper industry, are persistent and widespread environmental contaminants with a remarkable range of toxicity (Dobbs and Grant, 1979;Safe, 1986;Wu, 1999).…”

Section: Introductionmentioning

confidence: 99%

Quantitative structure–property relationships (QSPRs) on direct photolysis of PCDDs

Chen

Quan

Schramm³

et al. 2001

Chemosphere

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“…Previous investigations have shown that OCDF and OCDD are photodegradable (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). In our experiments, a direct quantitative comparison between degradation rates of these compounds was performed.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the photolytic degradation of octachlorodibenzofuran (OCDF) and octachlorodibenzo-p-dioxin (OCDD)

et al. 1995

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A comparative study of the photolytic degradation of octachlorodibenzofuran (OCDF) and octachlorodibenzo-p-dioxin (OCDD). Wagenaar, W.J.; Boelhouwers, E.J.; de Kok, H.A.M.; Groen, C.P.; van Houtenlaan, C.J.; Govers, H.A.J.; Olie, K.; de Gerlache, J.; de Rooij, C.G. Published in: Chemosphere DOI:10.1016/0045-6535(95)00158-5 Link to publication Citation for published version (APA):Wagenaar, W. J., Boelhouwers, E. J., de Kok, H. A. M., Groen, C. P., van Houtenlaan, C. J., Govers, H. A. J., ... de Rooij, C. G. (1995). A comparative study of the photolytic degradation of octachlorodibenzofuran (OCDF) and octachlorodibenzo-p-dioxin (OCDD). Chemosphere, 31, 2983-2992. DOI: 10.1016/0045-6535(95)00158-5 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. ABSTRACT Photolysis at 290 nm and higher wavelengths of octachlorodibenzofuran (OCDF) and octachlorodibenzo-p-dioxin (OCDD) was studied in three organic solvents hexane, 1,4-dioxane and methanol. It appeared that the degradation kinetics strongly depended on the type of solvent. OCDD degraded fastest in hexane, whereas OCDF degraded fastest in methanol. Less than 5% of the total loss of OCDD degraded by reductive dechlorination, with preferential loss of chlorine atoms at the 1 or 9 positions. 35 to 50% of the total loss of OCDF degraded via reductive dechlorination, with preferential loss of lateral chlorine. OCDF degraded faster than OCDD in all studied solvents.Photolysis at 290 nm and higher wavelengths of OCDD and OCDF adsorbed onto alumina impregnated with copper (alumina/Cu) in the presence of natural and distilled water was also investigated. Under these more relevant environmental aquatic conditions, photolysis of OCDD and OCDF was much slower than photolysis in the studied organic solvents. Significant loss was only found for OCDF. A part of the loss of OCDF could be explained by reductive dechlorination; the results suggested that other mechanisms of degradation occurred in addition to reductive dechlorination.All photolysis experiments showed that OCDF was photochemically less stable than OCDD. INTRODUCTION.In general, polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are

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“…Czuczwa and Hites (1986) found that the homologue profiles in the atmosphere and in lake sediments showed a significant enhancement of OCDD relative to all other homologues. In general, PCDF photodegrade much more rapidly than PCDD, and photolytic half-lives increase with increasing level of chlorination for both PCDD and PCDF (Corbet and Webster, 1998;Dobbs and Grant, 1979;Choudhry and Hutzinger, 1982). PCDD/Fs atmospheric degradation in vapor-phase has been suggested to explain the differences between the PCDD/Fs homologue profiles of sources and environmental sinks (Orth et al, 1990;Koester and Hites, 1992).…”

Section: Trends In Homologue Patternmentioning

confidence: 99%

Mobility and Profiles of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Sediment of Ya-Er Lake, China

Schramm

et al. 2001

Water Research

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Photolysis of highly chlorinated dibenzo-p-dioxins by sunlight

Cited by 72 publications

References 7 publications

Quantitative structure–property relationships (QSPRs) on direct photolysis of PCDDs

Quantitative structure–property relationships (QSPRs) on direct photolysis of PCDDs

A comparative study of the photolytic degradation of octachlorodibenzofuran (OCDF) and octachlorodibenzo-p-dioxin (OCDD)

Mobility and Profiles of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Sediment of Ya-Er Lake, China

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