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Tio_2 박막반응기에서의 2, 4, 6-trinitrotoluene(TNT)의 광촉매 분해
신기범,김영관 대한상하수도학회 2002 상하수도학회지 Vol.16 No.2
Degradation of TNT(2,4,6-trinitrotoluene) using a UV/TiO_2 thin film process was investigated in this research. The thin film was coated on the reactor surface by applying sol-gel method. Degradation of TNT at an initial concentration of 100mg/L by photocatalytic reaction was 38%. It was 21%, however, without the photocatalytic reaction(UV only). In an effort to increase the rate of degradation, predetermined amount of methanol was used as a solvent and hydrogen peroxide was added to the thin film reactor. Methanol addition of 20% by volume yielded the degradation rate as high as ca. 98%. However, the addition of hydrogen peroxide to the process which had received a 20% methanol resulted in a decrease of the degradation rate down to ca. 44%, providing no synergistic effect. The major by-products of photocatalytic TNT breakdown were identified as 2H-4,6DNT, 4H-2,6DNT, 2A-4,6DNT and 4A-2,6DNT. The degradation pathway of TNT was in the order of NO_2 →NHOH →NH_2.
TiO₂박막반응기에서의 2,4,6-trinitrotoluene(TNT)의 광촉매 분해
신기범,김영과 江原大學校 附設 環境硏究所 2002 環境硏究 Vol.19 No.-
Degradation of TNT(2,4,6-trinitrotoluene) using a UV/TiO₂thin film process was investigated in this research. The thin film was coated on the reactor surface by applying sol-gel method. Degradation of TNT at an intial concentration of 100㎎/L by photocatalytic reaction was 38%. it was 21%, however, without the photocatalytic reaction (UV only). In an effort to increase the rate of degradation, predetermined amount of methanol was used as a solvent and hydrogen peroxide was added to the thin film reactor. Methanol addi-tion of 20% by volume yielded the degradation rate as high as ca. 98%. However, the addition of hydrogen peroxide to the process which had received a 20% methanol resulted in a decrease of the degradation rate down to ca. 44%, providing no synergistic effect. The major by-products of photocatalytic TNT breakdown were identified as 2H-4,6DNT, 4H-2,6DNT, 2A-4,6DNT and 4A-2, 6DNT. The degradation pathway of TNT was in the order of -NO₂→-NHOH →-NH₂.