纳米铁协同超声降解氯苯的研究  

Study on the degradation of chlorobenzene by ultrasound synergized with nanoscale iron

作　　者：张选军[1] 戴友芝[1] 曹建平[1] 唐受印[2] 宋勇[1] 张小希[1] 

机构地区：[1]湘潭大学环境工程系,湘潭411105 [2]湖南工程学院,湘潭411104

出　　处：《环境污染治理技术与设备》2004年第8期32-34,共3页Techniques and Equipment for Environmental Pollution Control

基　　金：湖南省自然科学基金资助项目 ( 0 2JJY2 0 77)

摘　　要：报道了纳米铁协同超声波降解一氯代苯 (CB)的研究。探讨了有效声强、pH、CB初始浓度对降解效果的影响。比较了纳米铁协同超声波和单纯超声波对CB的降解效果和降解速率 ,反应 2 0min时 ,纳米铁协同超声波的降解率达到95 % ,而单纯超声波的降解率仅为 1 0 8%。上述两者都符合准一级反应动力学 ,超声波降解CB的准一级速率动力学常数k=6× 1 0 -3 min-1 ,而协同作用降解CB的准一级动力学常数k =1 6 3× 1 0 -1 min-1 ,提高了 2 7倍。The study on degradation of chlorobenzene by ultrasound synergized with nanoscale iron was reported. The reaction affecting factors such as pH,power intensity and initial concentration were introduced.The results showed that the degradation rate of CB was improved remarkably by ultrasound synergized with nanoscale iron. After 20 minutes, the degradation rate of CB was 95%, however, the degradation rate of CB by ultrasound alone was 10 8%. The degradation of CB by synergistic system and ultrasound alone was followed with pseudo first order kinetics. The pseudo first order kinetics constant of synergistic system (1 63×10 -1 min -1 )increased 27 times compared with that of ultrasounds(6×10 -3 min -1 ).

关 键 词：动力学常数 降解效果 超声降解 超声波降解 一级反应动力学 初始浓度 氯苯 CB 纳米 氯代苯 

分 类 号：X703[环境科学与工程—环境工程] X172