title: Reductive dechlorination of p-chlorophenol by nanoscale iron.
abstract: OBJECTIVE
  To investigate reductive dechlorination of 4-chlorophenol (4-CP) by nanoscale Fe0 under different conditions.
  
  
  METHODS
  Nanoscale Fe0 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 Fe0 was evaluated through batch studies over extended periods of time.
  
  
  CONCLUSIONS
  The nanoscale Fe0 can be used for sustainable treatment of contaminants in groundwater.
authors.affiliation: Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Cheng
authors.forename: Jian-Long
authors.initials: JL
authors.lastname: Wang
authors.forename: Wei-Xian
authors.initials: WX
authors.lastname: Zhang
mesh_terms: D002713:Chlorine / Q000737:chemistry*; D002733:Chlorophenols / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D002733:Chlorophenols; D014874:Water Pollutants, Chemical; C029107:4-chlorophenol; D002713:Chlorine; D007501:Iron