铁改性负载型TiO_2降解含氮活性染料试验  

Experimental Study on Iron Modified Supported TiO_2 Degradation of Nitrogen-Containing Dyes

作　　者：李亚峰[1] 刘元[1,2] 王建[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第6期1190-1194,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：住房和城乡建设部科技攻关项目(2009-K7-9);辽宁省教育厅重点实验室项目(2009S084)

摘　　要：目的研究Fe3+改性TiO2光催化剂对染料废水的处理效果,确定其去除含氮染料活性艳红X-3B废水的工艺条件.方法以自配活性艳红X-3B水样为处理对象,采用自制反应器,通过试验研究分析载体煅烧温度,Fe3+的掺杂量,镀膜次数,反应时间等对Fe3+-TiO2光催化剂去除活性艳红X-3B废水色度和COD的影响.结果当Fe3+掺杂量为0.5%时,煅烧温度为500℃,煅烧时间4.0 h,镀膜2次,溶液pH=3,催化剂投加量为10 g/L,曝气量为0.5m3/L,反应进行120 min时,废水的色度和COD去除率分别达到98.7%和70%.结论Fe3+的掺杂改性负载型TiO2光催化剂可以明显提高去除率,对催化剂的活性有很大提高.The paper aims to study the treatment effect of Fe^3＋ modification on supported TiO2 photo catalytic oxidant activity and to determine the process conditions of removing the reactive red dye X-3B wastewater containing nitrogen.By using self-made reactive red X-3B in water as dealing objects and self-made device,the influence of carrier calcinations temperature,Fe3 ＋ doping amount,coating numbers,reaction time on the color,and COD of reactive red X-3B wastewater by the Fe3 ＋ -TiO2 photo catalyst removed are analyzed based on the experimental study.With the condition that the optimum doping of Fe3 ＋ is 0.5% ,calcinations temperature is 500 ℃,calcinations time is 4 h,coating numbers is twice,pH is 3,the dosage of catalyst is 10 g/L,aeration amount is 0.5 m3 /L,the reaction time is 120 min,the results show that the removal rates of chromaticity and COD are respectively 98.7% and 70% .The experimental results demonstrate the supported TiO2 of Fe3 ＋ doping can effectively degrade the dyeing wastewater,furthermore,the supported Fe3 ＋ -TiO2 photo-catalyst has been greatly improved.

关 键 词：负载型TIO2 Fe^3+掺杂 活性艳红X-3B 含氮染料废水 光催化氧化 

分 类 号：X131.2[环境科学与工程—环境科学]