Abstract:
Catalytic degradation of 2,4,5-tricholrophenol(2,4,5-TCP )with UV/H 2 O 2 system has been studied andthe degradation effect has been examined with GC,GC-MS,UV-Vis spectrophotometer,and the catalytic degrada-tion mechanism has been analyzed preliminarily. The results show that the degradation process of 2,4,5-TCP is inaccordance with pseudo-first order kinetics equation. The degradation rate of 2,4,5-TCP is about 95%,when theinitial pH is 3.00,and H 2 O 2 0.01 mol/L,at room temperature,after irradiated by single 15 W UV lamp for 100 min.The degradation rate is about 90%,when irradiated by the same lamp for 30 min under the condition of 0.08 mol/LH 2 O 2,The main intermediates such as 1,2 -benzenedicarboxylic acid,bis(2-methylpropyl)ester and 1,2 -benzenedicarboxylic acid,mono(2-ethylhexyl) ester are surmised after analyzing the charts of GC-MS,and the finalproducts are small molecular compounds.
Key words:
UV/H 2 O 2 system,
catalytic degradation,
2 ,
4 ,
5-trichlorophenol,
degradation mechanism
摘要：
用UV/H2O2体系催化降解2,4,5-三氯苯酚(2,4,5-TCP),并用气相色谱仪、气质联用仪、紫外可见光分光光度计检测降解效果,初步分析了催化降解机理。结果表明:2,4,5-TCP的降解过程符合准一级动力学方程;在室温、初始pH为3.00和H2O2为0.01 mol/L条件下,单个15 W紫外灯照射2,4,5-TCP 100 min后的降解率约95%;在H2O2为0.08 mol/L时,体系反应30 min后的降解率约90%;分析GC-MS图后推测出主要中间产物有1,2-苯二甲酸二(2-甲基丙基)酯和1,2-苯二甲酸单(2-乙基己基)酯,最终产物为小分子化合物。
关键词:
UV/H2O2体系,
催化降解,
2,4,5-三氯苯酚,
降解机理
CLC Number:
Zong Yanping, Liu Xianhua, Du Xiwen, Shi Xiaoxuan, Liu Hongxi, Lu Yiren. Experimental study on the catalytic degradation of 2,4,5-trichlorophenol in water withUV/H2O2 system[J]. INDUSTRIAL WATER TREATMENT, 2013, 33(5): 47-49,56.
宗燕平, 刘宪华, 杜希文, 石潇璇, 刘洪喜, 鲁逸人. UV/H2O2体系催化降解水中2,4,5-三氯苯酚的研究[J]. 工业水处理, 2013, 33(5): 47-49,56.