Trichloroethylene Dechlorination by Copper-contained Zero-valent Iron Slurry  

作　　者：LI Hai-jun QIU Hua ZHANG Lan-ying LIU Na ZHU Bo-lin 

机构地区：[1]Key Laboratory of Groundwater Resources and Environment, Ministry of Education,Jilin University, Changchun 130021, P.R.China [2]Liaoyang Environmental Inspection Office, Liaoyang 111000, P.R.China

出　　处：《Chemical Research in Chinese Universities》2013年第6期1173-1179,共7页高等学校化学研究（英文版）

基　　金：the National Natural Science Foundation of China

摘　　要：Zero valent iron technology has been widely used for treating contaminated wastewater these years. However, it always results in inefficiency in the processes of drying and storage due to oxidation and passivation. This could be avoided by in situ synthesized zero valent iron slurry in an emergency if it possesses the same performance as zero valent iron. In this study, iron slurry was synthesized and directly used for dechlorinating trichloroe- thylene to measure its degradation efficiencies and properties. Results show that 2%（mass ratio） copper-contained zero-valent iron slurry exhibits the optimal performance compared with the other iron slurries. Batch experiments in- dicate that factors such as the concentration of trichloroethylene, pH, dissolved oxygen and equilibrium to a certain extent affect the reduction oftrichloroethylene by 2%（mass ratio） copper-contained zero-valent iron slurry. Persistent, high-efficiency degradation performance could last 7 cycles. These demonstrate that the application of coppercontained zero-valent iron slurry in treating trichloroethylene-contained wastewater is realistic.Zero valent iron technology has been widely used for treating contaminated wastewater these years. However, it always results in inefficiency in the processes of drying and storage due to oxidation and passivation. This could be avoided by in situ synthesized zero valent iron slurry in an emergency if it possesses the same performance as zero valent iron. In this study, iron slurry was synthesized and directly used for dechlorinating trichloroe- thylene to measure its degradation efficiencies and properties. Results show that 2%（mass ratio） copper-contained zero-valent iron slurry exhibits the optimal performance compared with the other iron slurries. Batch experiments in- dicate that factors such as the concentration of trichloroethylene, pH, dissolved oxygen and equilibrium to a certain extent affect the reduction oftrichloroethylene by 2%（mass ratio） copper-contained zero-valent iron slurry. Persistent, high-efficiency degradation performance could last 7 cycles. These demonstrate that the application of coppercontained zero-valent iron slurry in treating trichloroethylene-contained wastewater is realistic.

关 键 词：Zero valent iron Copper-contained zero-valent iron slurry TRICHLOROETHYLENE DECHLORINATION 

分 类 号：X703[环境科学与工程—环境工程] TQ222.423[化学工程—有机化工]