Pathway and kinetic of dechlorination of trichloroethylene in water by supported nanoscale bimetallic Fe-Cu particles
(0) In this paper, exfoliated graphite supported nanoscale Fe-Cu is synthesized by aqueous-phase reductive method. The effect trichloroethene (TCE) reduction by the supported nanoscale Fe-Cu bimetal is researched in the batch experiments. Kinetics studies show that the reduction of TCE process obeys pseudosecond-order kinetics. The kinetic constants of TCE reduction by supported nano bimetal are measured at different nano Fe° dosage and Cu content on bimetal in this study. When the dosage of supported nano Fe° in bimetal with 4wt％ Cu is 1.25g/L in reaction solution, the ksA of dechlorination reaction for TCE is higher than other nano Fe° dosage. The dechlorination speed becomes lower as well as kSA andKobs decreasing with increasing the Fe° dosage. Supported Fe-Cu bimetal with 4wr％ Cu content exhibits the best dehalogenation effect than those with other contents of Cu. The generation of H2 and effect of Cu analysis influence the TCE dechloriation and hydrogenation in the surface of bimetal to a different extent. Excess nano Fe° existing in the reaction system can generate plenty of H2 as well as increasing the solution pH value so that decrease the surface concentration of bimetal reactive sites and then hinder the TCE dechlorination in surface of bimetal. Cu as catalysis metal could accelerate the process of TCE dechlorination and hydrogenation.
nano Fe-Cu bimetallic particles trichloroethylene (TCE) dechlorination hydrogenation catalysis
Huan ZHANG YingXue ZHENG HaitaoWANG
State Key Laboratory of Hollow Fiber Membrane Materials and Processes (Tianjin Polytechnic Universit State Key Laboratory of Hollow Fiber Membrane Materials and Processes (Tianjin Polytechnic Universit State Key Laboratory of Hollow Fiber Membrane Materials and Processes (Tianjin Polytechnic Universit
国际会议
2011 International Conference on Advanced Material Research(ICAMR 2011)(2011年先进材料研究国际会议)
重庆
英文
126-130
2011-01-21（万方平台首次上网日期，不代表论文的发表时间）