H_2O_2强化水力空化降解罗丹明B废水  

Degradation of Rhodamine B in water by hydrodynamic cavitation with H_2O_2 augmentation

作　　者：张波[1] 沈立[2] 龚文娟[3] 

机构地区：[1]安徽职业技术学院化学工程系,合肥230011 [2]河海大学流体力学系,南京210098 [3]东南大学市政工程系,南京210096

出　　处：《环境工程学报》2015年第11期5364-5368,共5页Chinese Journal of Environmental Engineering

基　　金：安徽省高等学校优秀青年人才基金资助项目(2012SQRL246)

摘　　要：通过投加H2O2来强化水力空化技术降解罗丹明B废水(后称"Rh B"),考察了入口压力、p H、H2O2投加量和Rh B起始浓度等因素对Rh B降解效果的影响。结果表明,Rh B的降解规律符合拟一级降解动力学;随着入口压力的增加Rh B降解率增加;酸性条件能有效提高Rh B降解率,p H=3.0时Rh B达到最大降解率95.12%;H2O2能有效强化水力空化对Rh B的降解能力,但当H2O2浓度增至10 mg/L后,Rh B的降解率则不再增加;Rh B降解率与其起始浓度成反比;最后探究了Rh B的降解机理。The degradation of Rhodamine B（ Rh B） has been explored using a hydrodynamic cavitation reactor combined with CCl4 treatment. The effects of inlet pressure,operating p H values,H2O2 dosage and initial Rh B concentration were investigated. The results show that the Rh B degradation reaction follows a pseudo-firstorder kinetics. The degradation rate of Rh B increases as the inlet pressure increases. Acidic conditions can effectively increase the degradation rate of Rh B. The degradation rate could reach a maximum value of 95. 12% at p H of 3. 0. H2O2 can greatly strengthen the ability of the system for Rh B degradation. However,when the concentration of H2O2 reaches 10 mg / L,the degradation rate no longer responds to increasing H2O2 dosage basically. The degradation rate of Rh B is inversely proportional to its initial concentration. Finally,the degradation mechanisms of Rh B are discussed.

关 键 词：水力空化 H2O2 罗丹明B 强化 降解 自由基 

分 类 号：X703.1[环境科学与工程—环境工程]