摘要
为了研究温等离子体在处理烯啶虫胺农药废水方面的效果,采用中心进水、周边出水的辐流式沉淀池结构的反应器,通过介质阻挡放电产生低温等离子体处理烯啶虫胺溶液,研究了不同介质阻挡放电功率及外界因素如Fe2+、正丁醇、无机盐Na2CO3和H2O2等对等离子体降解烯啶虫胺的影响。实验结果表明,低温等离子体对烯啶虫胺有着较好的处理效果。提高放电功率能够有效地提高烯啶虫胺的降解率,放电功率为200W,降解处理180min,初始质量浓度为100mg/L的烯啶虫胺溶液中,烯啶虫胺的降解率达到82.7%;低质量浓度Fe2+、H2O2的添加可促进烯啶虫胺农药的降解,但是当添加物的质量浓度过高时会在一定程度上抑制降解;添加正丁醇和无机盐Na2CO3作为自由基俘获剂和缓冲剂则抑制了烯啶虫胺农药的降解;此外,烯啶虫胺溶液pH值随着降解过程进行逐渐降低。
In order to study the effect of low-temperature plasma on Nitenpyram ( NTP) pesticide containing wastewater treatment, employing reactor with a structure of radial flow sedimentation tank and centered fluid inlet, NTP solution was experimentally treated by low-temperature plasma produced by dielectric barrier discharge process. The influences of different dielectric barrier discharge's input power and different external factors, such as Fe2+ , butanol, Na2CO3 and H2O2 on nitenpyram degradation, on treatment results were studied. The results show that NTP could be effectively removed from aqueous solution by the low-temperature plasma. Increasing the input power can increase the degradation efficiency. 82.7 % of the NTP in 1L NTP solution (initially 100 mg/L) was degraded after 180 min treatment when the input power was 200 W. Low concentrations of Fe2+ and H2 O2 could enhance the degradation, however, they hinder the degradation at higher concentrations. The presence of n-butanol as hydroxide radical scavenger and sodium carbonate as buffer in the aqueous solution decreases the removal efficiency of NTP to some extent. Furthermore, the pH of NTP drops with the degradation processing.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第10期2517-2522,共6页
High Voltage Engineering
基金
国家"十一五"科技支撑计划(2006BAJ05A12)~~
关键词
介质阻挡放电
低温等离子体
烯啶虫胺
农药
降解
废水处理
dielectric barrier discharge
low-temperature plasma
nitenpyram
pesticide
degradation
wastewater treatment