二氧化钛光催化降解印染废水研究  

Study on Photocatalytic Degradation of Printing and Dyeing Wastewater by Titanium Dioxide

作　　者：高哲仪 GAO Zheyi(Guangdong Association for Environmental Monitoring,Guangzhou 510000)

机构地区：[1]广东省环境监测协会,广州510000

出　　处：《化工生产与技术》2023年第3期21-24,I0003,共5页Chemical Production and Technology

摘　　要：以钛酸丁酯钛源,采用溶胶-凝胶法合成了二氧化钛催化剂,使用XRD表征了催化剂的结构,以印染厂二级生化处理后的印染废水作为降解对象,研究了催化剂对印染废水光催化性能。结果表明,XRD测试证明成功合成了锐钛矿二氧化钛。二氧化钛催化剂对印染废水色度和COD去除率达到94%和89%,并好于P25催化剂。当溶液呈碱性时,更利于对印染废水色度和COD得分去除;催化剂循环使用6次后,其脱色率和COD去除率依然维持在90%以上,具有良好重复使用性能。The titanium dioxide catalyst was synthesized by sol-gel method with titanium butyl titanate as titanium source.The structure of the catalyst was characterized by XRD.The photocatalytic performance of the catalyst on printing and dyeing wastewater was studied by using the printing and dyeing wastewater after secondary biochemical treatment as the degradation object.The results show that anatase titanium dioxide was successfully synthesized by XRD test.The removal rate of color and COD of printing and dyeing wastewater by titanium dioxide catalyst reached 94%and 89%,which was better than that of P25 catalyst.When the solution is alkaline,it is more conducive to the removal of chroma and COD score of printing and dyeing wastewater;after the catalyst was recycled for 6 times,the decolorization rate and COD removal rate remained above 90%,showing good reusability.

关 键 词：二氧化钛 可见光光催化 工业印染废水 COD 脱色率 

分 类 号：X791[环境科学与工程—环境工程]