Ubiquitous nature of dioxins: a comparison with the dioxins content of common everyday materials with that of pulps and papers

Article Abstract:

Dioxins are widely present in the environment, and low levels of dioxins can be found in all ordinary materials, including pulp and paper. It is therefore of doubtful value to try to cut the dioxin content of pulp and paper below natural background levels unless other sources of dioxins are controlled. A number of theories have been put forward to explain the dioxin contamination found in recycled paper, and a study has analysed 19 pulp and paper samples to investigate the extent of contamination in samples which do not have any chlorine-bleached pulp or chlorine-based compounds.

Pulp mills, Research, Dioxin, Dioxins

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Effective sampling system for polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in flue gas from municipal solid incinerators

Article Abstract:

A dodecyl sulfuric acid-binding DEAE-Sephadex column was used in trapping flue gas from solid waste incinerators because of its ability to adsorb polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCCC/F). PCDD/F was separated from the flue gas using a probe, which can draw out flue gas from the sample. PCDD/F was effectively trapped in the DEAE-Sephadex column in both solid and gaseous forms and free from contaminants. This suggests that the DEAE-Sephadex column can be apparatus for analyzing gases in the atmosphere.

Incinerators, Air pollution, Flue gases

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Ubiquitous tar balls with a California-source signature on the shorelines of Prince William Sound, Alaska

Article Abstract:

Carbon-isotopic analyses of oil-like residues from shorelines of Prince William Sound in Alaska identified the residues as oil products that originated from the Monterey Formation source rocks of California. Although the flattened tar balls from the two regions show similar characteristics, they have significantly different isotopic compositions. However, there is still no explanation as to why the tar balls are widely dispersed.

Oil spills, Prince William Sound, Oil sands, Monterey Formation

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