高电压技术2017，Vol.43Issue(8)：2653-2659,7.DOI:10.13336/j.1003-6520.hve.20170731028
采用强电离放电法降解废水中难降解有机物
Non-thermal Oxygen Plasma Produced by a Strong Ionization Discharge and Its Application in Degrading Recalcitrant Organic Pollutants in Wastewater
摘要
Abstract
A non-thermal oxygen plasma (O2+ and O3) was produced by ionization and dissociation oxygen by a strong ionization discharge,and it was injected into a reaction tower of wastewater treatment for the degradation of recalcitrant organic pollutants in the wastewater.Four key plasma reactions took place in the reaction tower.Firstly,O2+ among non-thermal oxygen plasma reacted with H2O molecule to form trace hydroxyl radicals (·OH).Secondly,an initiator (HO2·) with high reaction rate constant was generated by O3 reacting with trace ·OH.And then,high concentration of ·OH with strong oxidizability and high reaction rate were formed by high concentration of O3 under the action of HO2·.So the ·OH degraded recalcitrant organic pollutants into harmless small organic molecules non-selectively and rapidly.Finally ·OH mineralizes the small organic molecules into CO2 and H2O.The experimental results show that the degraded concentration by non-thermal oxygen plasma will decrease from 145.0 mg/L to 25.5 mg/L within just 25 minutes,and the removal rate will reach 83.5％.Compared with conventional sewage treatment method,the method of degradation recalcitrant organic pollutants in the wastewater with non-thermal oxygen plasma formed by a strong ionization discharge has lower operating costs and initial investment,and the sewage treatment system is more simple.The advantages will provide an economic and practical new method for a deep-polluted wastewater reuse.关键词
低温氧等离子体/深度降解/难降解有机污染物/废水/强电离放电Key words
non-thermal oxygen plasma/deep degradation/recalcitrant organic pollutants/wastewater/strong ionization discharge引用本文复制引用
白敏菂,冷白羽,陈宝玖..采用强电离放电法降解废水中难降解有机物[J].高电压技术,2017,43(8):2653-2659,7.基金项目
国家自然科学基金(61371027 （）
11374044) （）
国家高技术研究发展计划(863计划)(2008AA06Z317).Project supported by National Natural Science Foundation of China (61371027,11374044) （863计划）
National High-tech Research and Development Program(863 Program) (2008AA06Z317). （863 Program）
