KMnO_4-O_3协同氧化降解地下水中低含量硝基苯  

DEGRADATION OF LOW CONCENTRATION NITROBENZENE IN UNDERGROUND WATER BY KMNO_4-O_3 SYNERGETIC OXIDATION

作　　者：邱立萍[1] 王文科[1] 杜鹃[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710064

出　　处：《水处理技术》2009年第7期46-50,共5页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项资助(2008ZX07012-002-003-003)

摘　　要：利用高锰酸钾-臭氧(KMnO4-O3)体系的协同氧化作用处理地下水中低含量硝基苯(NB),研究了KMnO4-O3体系氧化降解NB的机理和效果,分析了O3和KMnO4的不同投加量和不同pH等因素对NB降解效果的影响,以及对O3和KMnO4-O3体系氧化除污染效能进行了比较。结果表明,KMnO4能促进O3分解产生大量羟基自由基(·OH)活性基团,从而使KMnO4-O3体系比单独O3对地下水中NB的去除率提高了约37个百分点。在氧化反应12min、pH=6.0、KMnO4和O3分别投加0.8和1.0mg·L-1时,KMnO4-O3体系氧化降解NB的去除率可达95%以上。该法处理工艺经济易行,不会产次生环境问题。The technology of treating low concentration nitrobenzene （NB） in underground water was applied adopting the synergetic oxidation effect of potassium permanganate-ozone （KMnO4-O3） to study the efficiency and mechanism of Oxidative degradation of NB by KMnO4-O3, and analyze the effect of different dosage of KMnO4 and P3, pH value etc on the removal rate of NB,and contrast the capability of removal ling pollution on O3 a/one and KMnO4-O3 system. The results showed that KMnO4-O3 system can spur O3 to produce more .OH, and the efficiency of disposing NB increased by about 37 percents compared with O3 alone. At reacting time of 12 min, pH=6.0, and 0.8 mg·L^-1 KMnO4 and 1.0 mg·L^-1 O3, the removal rate of NB reaches above 95% adopting KMnO4-O3 oxidative degradation NB. The method is economical, easy and without secondary pollution.

关 键 词：高锰酸钾 臭氧 硝基苯 羟基自由基 氧化降解 

分 类 号：X523[环境科学与工程—环境工程]