臭氧微气泡氧化降解活性艳红X-3B废水研究  

Research on degradation of reactive brilliant red X-3B wastewater by ozone microbubbles

作　　者：区星 曾科[1] 焦芬[1] OU Xing;ZENG Ke;JIAO Fen(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan Province,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《化学工程》2020年第10期1-5,共5页Chemical Engineering(China)

摘　　要：利用实验室自制的微气泡发生装置,产生稳定的微气泡水。将微气泡技术与臭氧氧化相结合强化降解活性艳红X-3B模拟废水,考察了溶液初始pH、臭氧进气量、溶液初始浓度对活性艳红X-3B脱色和TOC的去除效果并作动力学分析。研究结果表明:微气泡发生装置运行稳定,微气泡平均直径为10.94μm。室温条件下,当活性艳红X-3B质量浓度为20 mg/L,溶液pH值为3,臭氧进气量为10 mL/min(臭氧质量浓度为6.24 mg/L)时,反应20 min后,脱色率为100%,TOC去除率为47.55%,反应符合准一级动力学方程。加入自由基捕获剂Na2CO3,活性艳红X-3B脱色率和TOC去除率均有所下降,证明了体系中·OH的存在,且·OH的氧化作用是活性艳红X-3B脱色和降解的主要原因。The stable microbubbles water was produced by the laboratory-made microbubbles generator.Microbubbles technology was combined with ozone oxidation to strengthen the degradation of simulated wastewater of reactive brilliant red X-3B.The decolorization and TOC removal effects of initial pH,ozone intake and initial concentration of the solution were investigated,and the kinetic analysis was made.The results show that the microbubbles generator operates stably and the average diameter of microbubbles is 10.94μm.At room temperature,when the mass concentration of reactive brilliant red X-3B is 20 mg/L,the pH of the solution is 3 and the ozone intake is 10 mL/min(the ozone mass concentration is 6.24 mg/L),the decolorization rate is 100% and TOC removal rate is 47.55% after 20 minutes.The reaction conforms to the quasi-first order kinetic equation.The decolorization rate and TOC removal rate of reactive brilliant red X-3B decreased with the addition of free radical scavenger Na2CO3,which proved the existence of·OH and the oxidation of ·OH were the main reason for the decolorization and degradation of reactive brilliant red X-3B.

关 键 词：臭氧 微气泡 活性艳红X-3B 羟基自由基 动力学 

分 类 号：X791[环境科学与工程—环境工程]