金属Na微粒子による絶縁油, 土壌, 排水汚染ダイオキシン類の分解無害化

抄録

Reaction between dioxins and sodium powder dispersed in oil was applied to the decomposition of dioxins in electric insulation oil, soil and wastewater by means of dechlorination. When PCB of electric insulation oil was contaminated with dioxins, sodium powder-oil suspension was directly added and reacted with dioxins. The dioxins in soil and reverse-osmosis concentrate of contaminated wastewater were dissolved into hydrocarbon via solvent extraction and then reacted with sodium powder-oil suspension at 90°C. Since the dioxins were decomposed and reduced in the level of lower than a few pg-TEQ/g or liter in every case, it is confirmed that the reaction with sodium powder-oil suspension is effective for the dechlorination of dioxins.