摘要
选用镍 /铁和铜 /铁双金属对四氯乙烯 (PCE)进行脱氯试验 .结果表明 ,双金属系统对四氯乙烯有明显的脱氯作用 ,且脱氯反应符合准一级反应动力学方程 ,双金属在降解PCE的过程中 ,无三氯乙烯 (TCE)、二氯乙烯 (DCE)和氯乙烯 (VC)等中间产物形成 ,与零价铁系统相比 ,双金属系统对PCE的降解速率有明显提高 ,尤其是Ni/Fe双金属 ,反应速率常数kSA从 0 1 2 89ml·m- 2 ·h- 1 提高到 0 3697ml·m- 2 ·h- 1 ,Cu/Fe双金属的反应速率常数kSA为 0 2 2 79ml·m- 2 ·h- 1 .无论是哪种反应介质 。
Ni/Fe and Cu/Fe bimetal were used to dechlorinate tetrachloroethene(PCE).The results show that bimetal systems were effective to the dechlorination of tetrachloroethene and the reactions followed first order equation.No intermediate products such as TCE,DCE and VC were detected during reaction.Compared with zero valent iron system,bimetal systems enhanced dechlorination rate significantly,especially for Ni/Fe system.The reaction rate constant( k SA )was increased from 0 1289ml·m -2 ·h -1 for zero valent iron system to 0 3697ml·m -2 ·h -1 for Ni/Fe and to 0 2279ml·m -2 ·h -1 for Cu/Fe.No mater what material reacted,drying in the preparation process strongly affected the dechlorination rate.
出处
《环境化学》
CAS
CSCD
北大核心
2003年第4期334-339,共6页
Environmental Chemistry
基金
国家自然科学基金资助项目 (No. 40 0 72 0 80
No. 40 1 42 0 0 9)
