유전체 배리어 방전 플라즈마를 이용한 애시드레드 27 수용액의 색도 제거 = Decolorization of Aqueous Acid Red 27 Solution Using Dielectric Barrier Discharge Plasma

다국어 초록 (Multilingual Abstract)

The physicochemical processes of dielectric barrier discharge (DBD) such as in-situ formation of chemically active species and emission of UV light were utilized for the decolorization of an aqueous solution formed with distilled water and an azo dye Acid Red 27. The DBD reactor consisted of two coaxial dielectric tubes with different diameters. Aqueous electrolyte solution was filled in the inner tube, which acted as the discharging electrode. The DBD reactor was submerged in the Acid Red 27 solution that was grounded. In this case, the Acid Red 27 solution acted not only as the counter electrode but also as the cooling medium of the DBD reactor. The DBD reactor with the aqueous discharging electrode was found to be more energy-efficient for the generation of ozone than that with typical metal electrode. The chemically active species (mostly ozone) produced in the DBD reactor were well dispersed in the Acid Red 27 solution using a porous gas diffuser, thereby increasing the gas-liquid contact area available for the decolorization. The results have clearly shown that the DBD reactor system was very effective for decolorizing the Acid Red 27 solution. For the purpose of improving the performance of the DBD reactor system, MnO_(2) catalyst was added to the Acid Red 27 solution. It was found that the catalyst significantly enhanced the decolorization.