摘要
采用超声波/铁粉协同降解水中2,4-二氯酚。考察了初始浓度、超声功率、铁粉投加量以及pH对降解效率的影响,并初步探讨了超声波/铁粉协同降解2,4-二氯酚的动力学规律。结果表明,超声波与铁粉对2,4-二氯酚的降解具有明显的协同效应。降解效率随超声功率和铁粉投加量的增大而增大,随初始浓度的增大而减小。pH对2,4-二氯酚的降解有显著影响,在pH为4时,降解效率最高。超声波/铁对2,4-二氯酚的协同降解符合一级反应动力学规律,降解速率常数为1.52×10-2min-1,与铁粉单独作用和超声单独作用相比,分别提高了约5倍和13倍。
Ultrasonic wave and Fe were employed to degrade 2,4-dichlorophenol （DCP） in aqueous solution. The effects of ultrasonic power, initial concentration, iron dosage and initial pH on 2,4-DCP degradation efficiency were inspected, and the degradation kinetics law was discussed. The results show that synergetic effect of the ultrasonic wave and Fe is significant. The decomposition efficiency of 2,4-DCP increases with the increase of ultrasonic power and iron dosage, and decreases with the increase of initial concentration of 2,4-DCP. The effect of initial pH on 2,4-DCP decomposition is distinct, the optimal pH value is 4. The degradation of 2,4-DCP conforms to first-order reaction law. The degradation rate constant of 2,4-DCP is 1. 52 × 10^-2 min^-1. The degradation rate constant of 2,4-DCP by the two was 5 times or 13 times greater than that by Fe or by ultrasonic wave, respectively.
出处
《化学世界》
CAS
CSCD
北大核心
2007年第7期414-417,共4页
Chemical World
关键词
2
4-二氯酚
超声波
铁
协同作用
2,4-dichlorophenol
ultrasonic wave
iron
synergism
