Possible remediation of dioxin-polluted soil by steam distillation.
2,7-Dichlorodibenzo-p-dioxin (DCDD) was found to evaporate easily with water vapor from a heated solution. Steam distillation was also effective for the removal of DCDD from DCDD-applied soil; its concentration (250 microg/50g soil) in the original soil decreased to less than 5% after steam distillation for only 20 min. Actual dioxin-polluted soil in Tokorozawa City was partially decontaminated using the same method. These results suggest that steam distillation could be a new remedial method for soils contaminated with persistent environmental pollutants, such as dioxins and polychlorinated biphenyls.
Mino
Y
Y
Department of Environmental Analysis, Osaka University of Pharmaceutical Sciences, Takatsuki, Japan. mino@oups.ac.jp
Moriyama
Y
Y
D003666:Decontamination / Q000379:methods*; D004147:Dioxins / Q000032:analysis* / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D013227:Steam
D004147:Dioxins; D012989:Soil Pollutants; D013227:Steam