ダイオキシン汚染土壌からのダイオキシン抽出法およびRu・α-Fe・Fe_3O_4複合粒子による抽出ダイオキシンの分解 [in Japanese] Method of Extracting Dioxins from Contaminated Soil and Decomposition of Extracted Dioxins Using Ru・α-Fe・Fe_3O_4 Composite Particles [in Japanese]
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To carry out the decomposition of chlorinated aromatic compounds such as dioxins, which are hard to decompose at room temperature, nanoscale α-Fe · Fe<sub>3</sub>O<sub>4</sub> composite particles were synthesized via α-FeO(OH) obtained by the reaction of ferrous sulfate and sodium carbonate aqueous solutions and contained 0.25 wt% precious metals (Pt, Pd, Rh and Ru). As the result of the decomposition of chlorobenzene (CB) using the composite particles containing precious metals, it was shown that Rh · α-Fe · Fe<sub>3</sub>O<sub>4</sub> and Ru · α-Fe · Fe<sub>3</sub>O<sub>4</sub> composite particles exhibit superior dechlorination function. Ru · α-Fe · Fe<sub>3</sub>O<sub>4</sub> composite particles were selected because of their low price. For the application of dioxin decomposition at room temperature in contaminated soil, an extractive reagent was selected. Successively, the decomposition of dioxins in extracted-reagent- suspended soil using Ru · α-Fe · Fe<sub>3</sub>O<sub>4</sub> composite particles was carried out at room temperature for seven days, and the initial Toxicity Equivalency Quantity (TEQ) values of dioxins in the solvents and soils decreased to 41-63% after the decomposition.
- Japan journal of water pollution research
Japan journal of water pollution research 30(2), 95-99, 2007-02-10
Japan Society on Water Environment