Characteristics of gas-liquid pulsed discharge plasma reactor and dye decoloration efficiency
| Autor: | Zhiying Gao, Nyein Nyein Aye, Dan Lv, Bing Sun, Masayuki Sato, Xiaomei Zhu |
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| Rok vydání: | 2012 |
| Předmět: |
Time Factors
Environmental Engineering Plasma Gases Surface Properties Analytical chemistry Color chemistry.chemical_element Conductivity Oxygen chemistry.chemical_compound Electrochemistry Methyl orange Environmental Chemistry Coloring Agents Electrodes General Environmental Science Argon Electric Conductivity Water General Medicine Nitrogen chemistry Wastewater Electrode Spectrophotometry Ultraviolet Water treatment Azo Compounds |
| Zdroj: | Journal of Environmental Sciences. 24:840-845 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/s1001-0742(11)60837-1 |
| Popis: | The pulsed high-voltage discharge is a new advanced oxidation technology for water treatment. Methyl Orange (MO) dye wastewater was chosen as the target object. Some investigations were conducted on MO decoloration including the discharge characteristics of the multi-needle reactor, parameter optimization, and the degradation mechanism. The following results were obtained. The color group of the azo dye MO was effectively decomposed by water surface plasma. The decoloration rate was promoted with the increase of treatment time, peak voltage, and pulse frequency. When the initial conductivity was 1700 μS/cm, the decoloration rate was the highest. The optimum distance between the needle electrodes and the water surface was 1 mm, the distance between the grounding electrode and the water surface was 28 mm, and the number of needle electrodes and spacing between needles were 24 and 7.5 mm, respectively. The decoloration rate of MO was affected by the gas in the reactor and varied in the order oxygen > air> argon > nitrogen, and the energy yield obtained in this investigation was 0.45 g/kWh. |
| Databáze: | OpenAIRE |
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