Degradation of tetrachloromethane and tetrachloroethene by Ni/Fe bimetallic nanoparticles

摘要：

The study investigated the potential of nanoscale Ni/Fe bimetallic particles reduction for carbon tetrachloride (CT) and tetrachloroethene (PCE). BET specific surface areas of the laboratory synthesized Ni/Fe (2% wt.) particle, with diameter on the order of 20-60nm, was approximately 52.61m2/g. Batch studies demonstrated that rapid transformations of PCE and CT were achieved with nanoscale Ni/Fe particles. The degradation process appeared to be pseudo-first-order. Values of the surface area normalized rate coefficients (KSA) of PCE and CT for the reaction with nano Ni/Fe were 2.068mL/(m2·h), 10.08mL/(m2·h), respectively. This indicated that the degradation rate of CT was about 5 times larger than that of PCE under comparable environmental condition. Significant amounts of DCM were detected for the reaction with CT unlike the PCE transformation where ethane was the only end-product, amount to 103% of the initial PCE carbon. Both DCM (～15%) and methane (～27%) were the major end products for CT reaction. Based on the rapid rate of degradation and no or less chlorinated byproducts, the nanoscale particles technology offered great opportunities for both fundamental research and technological application for remediation of contaminated ground water.

关键词： nanoscale Ni/Fe bimetallic particles reaction rate constant KSA PCE CT dechlorination

作者: Y Y HUANG F LIU H D LI

作者单位: National Research Center for GeoAnalysis,Beijing 100037,China China University of Geosciences(Beijing)/Beijing Key Laboratory of Water Resources &Environmental En Laboratory of Crustal Deformation and Process,Institute of Geomechanics,Chinese Academy of Geologica

会议类型: 国际会议

会议名称: The 8th China International Nanoscience and Technology Symposium(2009第八届中国国际纳米科技湘潭研讨会Cinsts09)

会议地点: 湖南湘潭

会议语种:英文

页码: 1-9

在线出版日期: 2009-10-23（万方平台首次上网日期，不代表论文的发表时间）