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A direct method for the decontamination of a fly ash amended wet soil, artificially polluted with dioxins

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Simion A., Kakeda M., Egashira N., Mitoma Y., Simion C.
Open Chemistry
|
2012
|
vol. 10
|
issue 5
1547-1555
EN
We report hereby the first method of direct treatment of a wet soil containing toxic polychloroderivatives. Using a system with metallic Ca and 5% Rh fixed on charcoal in methanol, soil samples artificially polluted with fly ash containing polychloro-dibenzodioxins (PCDDs), polychloro-dibenzofurans (PCDFs) and coplanar polychlorinated biphenyls (co-PCBs), and having 69.2% to 84.6% moisture content, were successfully treated and decontaminated. This treatment afforded excellent hydrodechlorination yields for the 29 most toxic congeners of PCDDs, PCDFs and PCBs (98.3% degradation yield based on toxic equivalent quotient - or TEQ) after a 24 h treatment, at room temperature. [...]
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