Comparative study on formations of polychlorinated dibenzo-p-dioxin, polychlorinated dibenzofuran and related compounds by pyrolysis of some precursors on unused sand for fluidized bed incinerator and long term used sand

Nito, Shin'ichi; Akimoto, Yoshio; Imagawa, Takashi; Inouye, Yoshio

doi:10.1016/s0045-6535(97)00252-x

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…PCDEs may be converted to more toxic polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) by photolysis or pyrolysis (Norström et al 1977;Lindahl et al 1980;Nito et al 1997). Of particular note are those produced from municipal solid waste incinerators (MSWIs) (Koistinen et al 1995b;Passivirta et al 1986;Kurz and Ballschmiter 1995;Olie et al 1977), which are known to be major sources of PCDEs and PCDD/Fs.…”

Section: Introductionmentioning

confidence: 99%

Influence of iron and copper oxides on polychlorinated diphenyl ether formation in heterogeneous reactions

Liu

Shen

Zhang

et al. 2013

Environ Sci Pollut Res

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Polychlorinated diphenyl ether (PCDE) has attracted great attention recently as an important type of environmental pollutant. The influence of iron and copper oxides on formation of PCDEs was investigated using laboratory-scale flow reactors under air and under nitrogen at 350°C, a temperature corresponding to the post-combustion zone of a municipal solid waste incinerator. The results show that the 2,2′,3,4,4′,5,5′,6-otachlorodiphenyl ether (OCDE) formed from the condensation of pentachlorophenol (PCP) and 1,2,4,5-tetrachlorobenzene (Cl 4

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Section: Introductionmentioning

confidence: 99%

Influence of iron and copper oxides on polychlorinated diphenyl ether formation in heterogeneous reactions

Liu

Shen

Zhang

et al. 2013

Environ Sci Pollut Res

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“…The levels of PCDEs in the environment are often higher than the levels of polychlorinated dibenzofurans (PCDFs) [12]. Processes of photolysis and pyrolysis may convert PCDEs to more toxic polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans [13][14][15]. Environmental pollution by PCDEs should therefore be given greater attention.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of polychlorinated diphenyl ether formation on a simulated fly ash surface

Liu

Zheng

Liu

et al. 2011

Journal of Hazardous Materials

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“…PCDD/Fs can form from homogeneous processes in the presence of precursors, such as chlorobenzenes (CBs), chlorophenols (CPs) and surfaceassociate chlorophenoxyl, under high temperature during combustion (Liu et al, 2013b). The pyrolysis, elimination, and dechlorination of polychlorinated diphenyl ethers (PCDEs) and polycyclic aromatic hydrocarbons (PAHs) (Lindahl et al, 1980;Nito et al, 1997), as well as the condensations and recombination of fragments (PCDEs, CBs, and CPs) (Weber and Hagenmaier, 1999) have been reported as the major transformation mechanisms of these POPs in the gaseous phase. Nevertheless, de novo synthesis is the dominant heterogeneous reaction to form PCDFs (Stieglitz et al, 1990;Huang and Buekens, 1995).…”

Section: Emissions Of Pcdd/fsmentioning

confidence: 99%

Persistent Organic Pollutant Reductions from a Diesel Engine Generator Fueled with Waste Cooking Oil-based Biodiesel Blended with Butanol and Acetone

Tsai

Lin

Chen

et al. 2017

Aerosol Air Qual. Res.

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This investigation focuses on the effects on emissions of persistent organic pollutants (POPs) (polychlorinated dibenzop-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs) and polybrominated diphenyl ethers (PBDEs)) from a diesel engine fuelled by 20 vol% waste cooking oil-based biodiesel (W20) blended with various fractions of dehydrate/hydrous butanol (B/B′) and acetone (A/A′). The emission concentrations of the POPs were in the order PBDE ≫ PBDD/F > PCB > PCDD/F, regardless of the blending fuel or engine load. The POP with highest concentration was PBDE, being 2-3 times that of the others. Conversely, the magnitude of emitted toxicity followed the order PCDD/F > PCB ≈ PBDD/F, while PCDD/F emissions had about 10 times the toxicity concentrations of PCBs and PBDD/Fs. Among the dioxin compounds, the emissions of PCDDs represented 46-73% (average 57%) and 50-72% (average 59%) of total PCDD/F mass and toxicity concentrations, respectively, and were which and were thus significantly higher than those of PCDFs. The non-ortho-PCB contributed almost all toxicity (~100%) of 14 dioxin-like-PCBs, even though its contribution in mass was only 9-32% (average 16%) among the congeners. Similarly, PBDFs accounted for ~100% of toxicity of PBDD/Fs. Additionally, deca-BDEs contributed to most of the mass emissions of PBDEs (47.0-90.5%, 82.4% in average), while nona-BDEs and tri-to octaBDEs only contributed 10% and 8%, respectively. The reductions of the absolute mass concentrations of POPs from W20 were in the order PBDEs >> PBDD/Fs > PCDD/Fs ≈ PCBs for all multi-component diesel blends. The reduction fractions of POPs were in the order PCDD/F > PCB ≈ PBDD/F > PBDE, and those of TEQ were PCDD/F > PCB > PBDD/F. Thus, the addition of butanol and acetone, whether pure or hydrous, could further lower the POP emissions from W20.

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Comparative study on formations of polychlorinated dibenzo-p-dioxin, polychlorinated dibenzofuran and related compounds by pyrolysis of some precursors on unused sand for fluidized bed incinerator and long term used sand

Cited by 7 publications

References 10 publications

Influence of iron and copper oxides on polychlorinated diphenyl ether formation in heterogeneous reactions

Influence of iron and copper oxides on polychlorinated diphenyl ether formation in heterogeneous reactions

Mechanism of polychlorinated diphenyl ether formation on a simulated fly ash surface

Persistent Organic Pollutant Reductions from a Diesel Engine Generator Fueled with Waste Cooking Oil-based Biodiesel Blended with Butanol and Acetone

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