| 초록 |
Degradation of acetylsalicylic acid (ASA), that one of the pharmaceutical waste ingredients, was carried out by liquid phase plasma (LPP) process which could generate the strong oxidants such as hydroxyl radical and excited oxygen. The effects as operating condition of power supply, concentration of ASA, and the amount of hydrogen peroxide were assessed, and the degradation rate and the intermediates were identified. The degradation rate of ASA was greatly enhanced with increasing the operating condition parameter of power supply as applied voltage, frequency, and pulse width. As the parameter value increased, the chemical activated species having strong oxidant power were more generated and then the degradation rate of ASA was improved. When the hydrogen peroxide was added into the reactant solution, the degradation efficiency of ASA were greatly promoted whereas the excess of hydrogen peroxide decreased the degradation rate. |
