Reductive Dechlorination of p-Chlorophenol by Nanoscale Iron  

作　　者：RONG CHENG JIAN-LONG WANG WEI-XIAN ZHANG 

机构地区：[1]Laboratory of Environmental Technology, INET,, Tsinghua University, Beijing 100084, China [2]Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, PA 18015-3176, USA

出　　处：《Biomedical and Environmental Sciences》2007年第5期410-413,共4页生物医学与环境科学（英文版）

基　　金：The work was supported by the National Natural Science Foundation of China (Grant No. 50325824; 50678089).

摘　　要：Objective To investigate reductive dechlorination of 4-chlorophenol （4-CP） by nanoscale Fe^0 under different conditions. Methods Nanoscale Fe^0 was synthesized by using reductive method. 4-CP and its intermediate products were analyzed by HPLC. Chlorine ion was quantified with DX-100 ion chromatograph. Nano-iron particles were observed under a FEI Quanta 200 FEG environmental scanning electron microscope （ESEM）. Results The size of the particles was in the range of 10-100 nm. The nano-iron particles could reduce 4-CP effectively. The initial concentration of 4-CP increased with the decrease of the relative degradation rate, whereas the reduced amount of 4-CP increased. Temperature could influence both the dechlorination rate and the reaction pathway. Moreover, the stability and durability of nanoscale Fe^0 was evaluated through batch studies over extended periods of time. Conclusion The nanoscale Fe^0 can be used for sustainable treatment of contaminants in groundwater.Objective To investigate reductive dechlorination of 4-chlorophenol （4-CP） by nanoscale Fe^0 under different conditions. Methods Nanoscale Fe^0 was synthesized by using reductive method. 4-CP and its intermediate products were analyzed by HPLC. Chlorine ion was quantified with DX-100 ion chromatograph. Nano-iron particles were observed under a FEI Quanta 200 FEG environmental scanning electron microscope （ESEM）. Results The size of the particles was in the range of 10-100 nm. The nano-iron particles could reduce 4-CP effectively. The initial concentration of 4-CP increased with the decrease of the relative degradation rate, whereas the reduced amount of 4-CP increased. Temperature could influence both the dechlorination rate and the reaction pathway. Moreover, the stability and durability of nanoscale Fe^0 was evaluated through batch studies over extended periods of time. Conclusion The nanoscale Fe^0 can be used for sustainable treatment of contaminants in groundwater.

关 键 词：Nanoscale iron 4-CP PHENOL DECHLORINATION Priority pollutant 

分 类 号：X705[环境科学与工程—环境工程]