环境化学
孙旭辉,马军,王孝宇,李小华.臭氧/钛酸铋系化合物催化氧化降解橙黄Ⅳ的初步研究[J].环境科学学报,2009,29(5):1029-1035
臭氧/钛酸铋系化合物催化氧化降解橙黄Ⅳ的初步研究
- Bismuth titanate catalysts for catalytic ozonation of orange Ⅳ
- 基金项目：国家高技术研究发展计划(863)资助项目(No.2006AA06Z306)
- 作者
- 单位
- 孙旭辉
- 1. 哈尔滨工业大学, 城市水资源开发利用(北方)国家工程中心, 哈尔滨 150090; 2. 东北电力大学化学工程学院, 吉林 132012
- 马军
- 哈尔滨工业大学, 城市水资源开发利用(北方)国家工程中心, 哈尔滨 150090
- 王孝宇
- 东北电力大学化学工程学院, 吉林 132012
- 李小华
- 东北电力大学化学工程学院, 吉林 132012
- 摘要：采用化学溶液分解法制备了钛酸铋系化合物,并研究了其催化臭氧化降解橙IV(C18H14KN3O35)溶液的性能.结果表明,在Bi/Ti摩尔比12B1、热处理温度550e条件下制备的催化剂性能最优,其COD去除率达40.3%,比单独臭氧作用(20.3%)提高了1倍,并明显优于TiO2和Bi2O3的催化效果(分别为28.9%和21.4%).同时,考察了催化剂投量、橙IV初始浓度、臭氧投量、pH值、重复使用等反应条件对催化剂性能的影响.初步推断,此催化臭氧化反应为非羟基自由基的含氧自由基作用机理.
- Abstract：Bismuth titanate catalysts were prepared by a chemical solution decomposition method(CSD)and their catalytic ozonation effect on decomposing orange IV(C18H14KN3O35)was studied.The best catalytic activity was obtained for the catalyst with a Bi/Ti mol ratio of 12:1 which was calcined at 550℃.It is demonstrated that the removal rate of COD for catalytic ozonation(40.3%)is double that of ozonation alone(20.3%).The catalytic effect of the bismuth titanate is much better than TiO2 and Bi2O3 alone(28.9% and 21.4%,respectively).We also investigated the influence of different reaction conditions such as catalyst mass,initial concentration of orange IV,ozone dose,pH and repeated use of catalyst on the activity of catalyst.It is inferred that the main active species in the catalytic ozonation are oxygen-containing radicals,except for hydroxyl radicals.
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