氧化铈对O_3/H_2O_2体系降解对氯硝基苯效果的影响  

Study on the Influence of Cerium Oxide on the Degradation of Parachloronitrobenzene in the O_3/H_2O_2 System

作　　者：王群[1] 杨志超[1] 白晓峰[1] 卢晓辉[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031

出　　处：《水处理技术》2016年第1期49-51,55,共4页Technology of Water Treatment

基　　金：水体污染控制与治理科技重大专项(2009ZX07424-005-02);国家自然基金(51378141);水的深度处理与资源化利用重点实验室课题研究(PS13H05);国家大学生创新性实验计划(201510613015)

摘　　要：采用静态实验考察了氧化铈对O_3/H_2O_2体系中臭氧分解及对氯硝基苯(pCNB)降解的影响,并探究了硫酸根离子对催化体系的作用。结果表明,氧化铈会抑制O_3/H_2O_2体系中臭氧的分解及对氯硝基苯的降解,而具有强络合作用的硫酸根离子会消除这种抑制作用。氧化铈通过对臭氧及HO_2-、O_2-等含氧负离子的吸附抑制了羟基自由基的生成,由此抑制了O_3/H_2O_2体系中臭氧分解及pCNB的降解。The influence of cerium oxide on both ozone decomposition and para-chloronitrobenzene （pCNB） degradation in the O3/H2O2 system was studied. Meanwhile, the effect of sulfate ions on the catalytic ozonation was also investigated. The results showed that cerium oxide would inhibit ozone decomposition and also pCNB degradation. Moreover, the inhibitory effect couldbe eliminated by the addition of sulfate ions. The phenomenon might be resulted from the adsorption of O3 and oxygen-containing species on the surface of CeO2, which inhibited the generation of HO·.

关 键 词：氧化铈 O_3/H_2O_2 对氯硝基苯 硫酸根离子 羟基自由基 

分 类 号：X703.5[环境科学与工程—环境工程]