Time trends in levels, patterns, and profiles for polychlorinated dibenzo-p-dioxins, dibenzofurans, and biphenyls in a sediment core from the Baltic Proper

Article Abstract:

The trend over time in the levels, patterns and profiles of polychlorinated dibenzo-p-dioxins and furans (PCDD Fs) and polychlorinated biphenyls (PCBs) were examined using dated sediment cores from the Baltic Proper. Nine disks dated from 1882 up to 1985 were obtained. The results showed that PCDD Fs and PCBs are present in the period 1882-1962. Their probable source is combustion of wood, peat and coal. Increased levels of PFDD Fs and PCBs coinciding with changes in PCDD F congener profiles and isomeric patterns were observed in sediment cores from the period 1970-1985. Their probable sources are chloroorganics such as pentachlorophenol.

Environmental aspects, Organochlorine compounds, Organic chlorine compounds, Baltic Sea

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Influence of HCl and Cl2 on the formation of polychlorinated dibenzo-p-dioxins/dibenzofurans in a carbon/fly ash mixture

Article Abstract:

The effect of HCl and Cl2 on the formation of polychlorinated (PCDD) dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDF) in incinerator fly ash is investigated. The results showed that formation of both PCDD and PCDF proceeded at an equal rate with both HCl and Cl2. This indicates that temperatures should be kept as low as possible during the removal of fly ash particles from the flue gas.

Research, Dioxin, Dioxins, Fly ash

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Similar abstracts:

• Abstracts: Vertical profileof polychlorinated dibenzo-p-dioxins, dibenzofurans, naphthalenes, biphenyls, polycyclic aromatic hydrocarbons, and alkylphenols in a sediment core from Tokyo Bay, Japan
• Abstracts: Atmospheric behavior of polychlorinated dibenzo-p-dioxins and dibenzofurans and the effect of combustion temperature

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