摘要
文章研究了等离子体内电极位置对甲基紫水溶液的降解影响。结果表明:甲基紫溶液的降解率与电极位置有关,且在0mm和22.5mm处出现2个最高值。在0mm和22.5mm 2种电极位置时,经处理后的甲基紫溶液产生的沉淀和清液的成分不同;在0mm处甲基紫溶液经等离子体放电处理后的清液中主要是含氧和羟基的小分子物质;而在22.5mm时主要是芳香类含-CO和含-OH的物质。研究认为:在内电极位置为0mm处时主要是高能电子的作用,而在22.5mm时主要是甲基紫经等离子体放电处理后产生的甲基紫的碎片与O2的作用以及高能电子与O2和H2O溶液作用产生的OH.和ea-q等活性物质共同作用的结果。这些结果为等离子体降解有机废水的实际应用提供了信息。
The influence of the electrode position on degradation of methyl violet in aqueous solution was studied by using the plasma method. The results show that the degradation efficiency of aqueous methyl violet had relation with the electrode position, and the optimal positions were found to be at 22. 5 mm and 0 mm,and that the degradation mechanism of these two electrode positions were different. When the electrode position was at 0 mm,high-energy electrons attacked the solvent molecules to produce active particles such as OH · and eaq^- which resulted in the degradation of organic compounds. With the electrode position at 22. 5 mm, the organic compounds could also be broken down into smaller pieces, which then reacted with O2. These results provide important information on the use of plasma in the degradation of organic wastewater.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第2期182-187,共6页
Journal of Hefei University of Technology：Natural Science
关键词
等离子体
电极位置
甲基紫水溶液
降解率
dielectric barrier discharge（DBD）
electrode position
methyl violet aqueous solution
degradation efficiency
