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

作　　者：陈银生[1] 张新胜[1] 常胜[1] 戴迎春[1] 袁渭康[1] 

机构地区：[1]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

出　　处：《环境科学学报》2005年第1期113-116,共4页Acta Scientiae Circumstantiae

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.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 ·OH radical. The ozone and ·OH radical 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.

关 键 词：等离子体降解 废水 脉冲放电 有机物 4-氯酚 臭氧 羟基自由基 放电电极 氧化反应 组分 

分 类 号：X703[环境科学与工程—环境工程] X701