摘要
双极性脉冲放电是一种有效的水处理方法。为此,研究了在双极性脉冲放电条件下气液固三相混合体反应器内五氯酚的降解情况,考察了放电过程中液相中H2O2和气相中O3的产生规律及电压、气体体积流量等工况条件对H2O2产生反应速率和O3生成速率的影响。结果表明,反应体系对典型持久性有机物五氯酚有良好的降解效果,初始质量浓度50mg/L的五氯酚溶液,反应进行6min后,五氯酚基本转化为其他中间产物;60min后,苯环基本被打开,五氯酚基本被完全降解。放电过程中液相中H2O2的生成反应呈零级反应特征,反应速率常数与电压和气量呈正相关;气相中O3存在类似的规律。
Bipolar pulsed discharge is an effective method of water treatment. Degradation of the Pentachiorophenol by bipolar pulsed discharge in Glass-sphere/Water/Air Columns was investigated and the active species formed during discharge process was tested. Experimental results show that PCP can be quickly degraded during the bipolar pulsed discharge process. Almost all the PCP can be converted into other intermediates after 6 min discharge treatment,while all the benzene rings are broken for a 60 min treatment. Hydrogen peroxide and ozone can be formed during the discharge process,which is zero-ordered reaction. Rate constant k increases with the applied voltage and the gas flow rate.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第7期1803-1808,共6页
High Voltage Engineering
基金
国家自然科学基金(50807029)
教育部博士点新教师基金(200800031067)
广东省自然科学基金(7301730)~~
关键词
双极性脉冲
放电
气液固混合体
活性物质
臭氧
过氧化氢
五氯酚
bipolar pulse
discharge
water-air-solid mixture
active species
ozone
hydrogen peroxide
pentachlorophenol
