摘要
采用铋酸钠为催化剂,在可见光条件下光催化氧化处理苯胺,分别采用单因子试验和正交因子试验研究了苯胺初始浓度、苯胺废水初始pH值、催化剂投加量对氧化效果的影响,分析了光催化动力学模型和动力学速率方程。结果表明,铋酸钠光催化氧化能够快速降解水中的苯胺,试验中各条件下苯胺的降解率2h后最低也可达到60%以上,一些条件下甚至可达95%以上;正交试验表明最佳运行条件为pH=5,催化剂投加量为1 g/L,苯胺初始质量浓度为20 mg/L;铋酸钠光催化氧化苯胺符合Langmuir-Hinshelwood一级动力学模型及其动力学速率方程;苯胺初始质量浓度从20 mg/L增加到60 mg/L时,反应速率从0.040 2min-1降至0.022 2 min-1。
The photocatalytic degradation of aniline over NaBiO3 under visible light irradiation is studied by individual ex periment and orthogonal test to explore the influences of the initial concentration, pH, NaBiO3 dosage on the oxidation. Pho tocatalytie dynamic model and dynamic rate equation are also analyzed. The results show that aniline can almost completely be decolorized to 60% in 120 rains which even can reach 95% in given conditions; the best working condition should be： pH = 5, NaBiO3 dosage is lg/L and initial concentration of aniline is 20 mg/L; the photocatalytic degradation conforms with first - order kinetic model and dynamic rate equation of Langmuir- I-Iimhelwood; while the initial concentration of aniline increases from 20 mg/L to 60 mg/L, the reaction rate decreases from 0.040 2 min^-1 to 0.022 2 min^-1.
出处
《工业安全与环保》
北大核心
2014年第3期11-13,57,共4页
Industrial Safety and Environmental Protection
基金
国家自然科学基金资助项目(41272266)
四川省教育厅自然科学重点项目(10ZA113)
关键词
铋酸钠
光催化
苯胺
NaBi03 photocatalytic aniline
