Halogenated aromatics from steel production: Results of a pilot-scale investigation
Öberg, T.
Chemosphere, 56, 441-448 (2004)
Abstract
The potential environmental impact of emissions of halogenated aromatics from
the steel industry is of growing concern. It has been suggested that electric
arc furnaces are the only industrial source with constant or increasing
emissions of dioxins to air. Here the results are reported from a pilot plant
study on how scrap composition and various treatment alternatives affect the
formation and release of chlorinated and brominated aromatics. The experiments
were conducted with a statistical mixture design, and it is shown that scrap
composition has a significant impact on the outcome. In contrast, the various
treatment schemes examined –– shredding, disassembly, and briquetting –– did not
affect the formation and release of halogenated aromatics. Parallel experiments
with injection of adsorbents showed that it is possible to reduce emissions
without substantial investments, and this option is recommended as a low-cost
solution.
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