环境污染治理与修复
陈银生,张新胜,常胜,戴迎春,袁渭康.脉冲放电等离子体降解废水中有机物的作用机理探索[J].环境科学学报,2005,25(1):113-116
脉冲放电等离子体降解废水中有机物的作用机理探索
- Study on the degradation mechanism of organic compounds in the aqueous solution by pulsed high-voltage discharge plasma
- 基金项目：
- 作者
- 单位
- 陈银生
- 华东理工大学联合化学反应工程研究所 反应工程国家重点实验室, 上海 200237
- 张新胜
- 华东理工大学联合化学反应工程研究所 反应工程国家重点实验室, 上海 200237
- 常胜
- 华东理工大学联合化学反应工程研究所 反应工程国家重点实验室, 上海 200237
- 戴迎春
- 华东理工大学联合化学反应工程研究所 反应工程国家重点实验室, 上海 200237
- 袁渭康
- 华东理工大学联合化学反应工程研究所 反应工程国家重点实验室, 上海 200237
- 摘要：借助对脉冲放电过程中产生的多种氧化性组分的定量测定并结合对工艺实验结果的对比分析,探索了脉冲放电等离子体降解4-氯酚的作用机理.放电过程中当从放电电极鼓入氧气时,脉冲放电降解有机物的作用机理过程为:氧气放电产生臭氧,臭氧然后传质到废水中,废水中的臭氧及其分解产物羟基自由基等氧化性物质与废水中的有机物的氧化反应.该作用机理是建立脉冲放电等离子体降解有机物过程数学模型的理论基础.
- Abstract：The degradation mechanism of p-chlorophenol in the aqueous solution by pulsed high-voltage discharge plasma was explored by measuring the oxidant species generated due to the pulsed high-voltage discharge in the aqueous solution and by comparing the technique experimental results of various conditions. When oxygen was bubbled to the aqueous solution in the discharge reactor through the discharge electrode, the organic pollutants in the aqueous solution were degradated through the following steps. First, ozone was formed due to the oxygen discharge in the strong electric field. And then ozone transfered from gas bubble to the aqueous solution containing p-chlorophenol. In the aqueous solution, ozone could decompose to form ·OHradical. The ozone and ·OHradical in the aqueous solution could react with the p-chlorophenol contained in the aqueous solution. The investigation of the organic pollutant degradation mechanism in the aqueous solution could provide the theoretical base to the mathematical modeling of the organic pollutants degradation by the pulsed high-voltage discharge plasma in the aqueous solution.
- Key words：pulsed high-voltage discharge organic pollutant degradation mechanism oxygen discharge ozone wastewater treatment
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