PCDF formation from PCBs under fire conditions

Erickson, Mitchell D.; Cole, Christopher J.; Flora, Jairus D.; Gorman, Paul; Haile, Clarence L.; Hinshaw, Gary D.; Hopkins, Fred C.; Swanson, Steve E.; Heggem, Daniel T.

doi:10.1016/0045-6535(85)90202-4

Cited by 21 publications

(4 citation statements)

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“…Erickson et al (1985) have observed that optimal formation of PCDF occurred in their studies on PCB + Oil oxidation at 8% oxygen at 675°C. These studies were at higher temperatures than the heterogeneous studies from the Steiglitz, Karasek, and Hutzinger research groups, and it is likely that they represent homogeneous formation pathways.…”

Section: Scheme2mentioning

confidence: 95%

Pathways to Chlorinated Dibenzodioxins and Dibenzofurans from Partial Oxidation of Chlorinated Aromatics by OH Radical: Thermodynamic and Kinetic Insights

Ritter

Bozzelli

1994

Combustion Science and Technology

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Polychlorinated-dibenzodioxins (PCDD's) and polychloro-dibenzofurans (PCDF's) are considered to be formed in combustion environments below 600°C, where an important reactive species is OH. Thermodynamic properties, A.H~(298 K), SO (298 K) and CP(T) are calculated in this study for selected poly-chlorinated biphenyls (PCB's), dibenzofurans (PCDF), dibenzodioxins (PCDD) and corresponding radical intermediates resulting from hydroxyl radical addition reactions. These thermodynamic properties are combined with thermochemical kinetic analysis and are used to examine potentially important pathways to homogeneous PCDD and PCDF formation. Analysis of the reaction pathways show several likely routes to formation of chlorinated PCOF's and PCOO's involving unimolecular H'Cl elimination or loss of Cl, which occur following hydroxy radical addition at Cb-Cl sites. Equilibrium constants for these reactions are calculated using the estimated thermodynamic properties, and strongly favor formation of the PCDD and PCDF products. The addition reactions ofOH resulting in PCDF/PCDD formation compete with addition of OH radical at fused ring sites, which are responsible for ring cleavage and destruction of these species.

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Section: Scheme2mentioning

confidence: 95%

Pathways to Chlorinated Dibenzodioxins and Dibenzofurans from Partial Oxidation of Chlorinated Aromatics by OH Radical: Thermodynamic and Kinetic Insights

Ritter

Bozzelli

1994

Combustion Science and Technology

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“…Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are found as byproducts in the production of diverse industrial compounds including polychlorinated biphenyls (PCBs), polychlorinated naphthalenes, and chlorinated phenols (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). PCDDs and PCDFs are also formed during the combustion of chlorinated chemicals, and not surprisingly, these compounds are routinely detected as byproducts during the incineration of industrial and municipal waste (10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of polychlorinated dibenzo-p-dioxin and dibenzofuran congeners in Great Lakes fish extracts by gas chromatography-mass spectrometry and in vitro enzyme induction activities

Zacharewski¹,

Safe²,

Safe³

et al. 1989

Environ. Sci. Technol.

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“…Mineral oil, the most common insulating liquid used for transformer impregnation, belongs to the class of dangerous waste [1]. In particular, in the case of polychlorobiphenyl (PCB) contaminated oil, environmental risks increase dramatically, also due to the possible formation of polychlorodibenzodioxins (PCDD) and polychlorodibenzofurans (PCDF) [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Determination of copper in liquid and solid insulation for large electrical equipment by ICP-OES. Application to copper contamination assessment in power transformers

Bruzzoniti

Carlo

Sarzanini

et al. 2012

Talanta

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PCDF formation from PCBs under fire conditions

Cited by 21 publications

References 0 publications

Pathways to Chlorinated Dibenzodioxins and Dibenzofurans from Partial Oxidation of Chlorinated Aromatics by OH Radical: Thermodynamic and Kinetic Insights

Pathways to Chlorinated Dibenzodioxins and Dibenzofurans from Partial Oxidation of Chlorinated Aromatics by OH Radical: Thermodynamic and Kinetic Insights

Comparative analysis of polychlorinated dibenzo-p-dioxin and dibenzofuran congeners in Great Lakes fish extracts by gas chromatography-mass spectrometry and in vitro enzyme induction activities

Determination of copper in liquid and solid insulation for large electrical equipment by ICP-OES. Application to copper contamination assessment in power transformers

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