title: Removing pentachlorophenol from water using a nanoscale zero-valent iron/H2O2 system.
abstract: Nanoscale zero-valent iron (nZVI) is an environmentally benign material that has been widely used as a reducing agent to treat environmental pollutants. In this study, nZVI was used as a heterogeneous Fenton catalyst in an nZVI/H2O2 system to remove pentachlorophenol (PCP) from water. The PCP degradation process in the nZVI/H2O2 system was completed within 1h. The relative Cl(-) concentration increased throughout the test period (6h), indicating that the performance of the oxidative system in terms of dechlorination was excellent. The initial H2O2 concentration significantly influenced the PCP removal rate, and nZVI performed better than commercial zero-valent iron as a catalyst. Moreover, magnetite (Fe3O4), which was the main product of the corrosion of nZVI, was found to perform well as an adsorbent and catalyst, so it allowed the nZVI to be effectively reused.
authors.affiliation: School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China.
authors.forename: Rong
authors.initials: R
authors.lastname: Cheng
authors.affiliation: School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China.
authors.forename: Can
authors.initials: C
authors.lastname: Cheng
authors.affiliation: School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China. Electronic address: lgh@ruc.edu.cn.
authors.forename: Guo-Hua
authors.initials: GH
authors.lastname: Liu
authors.affiliation: School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Zheng
authors.affiliation: School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China.
authors.forename: Guanqing
authors.initials: G
authors.lastname: Li
authors.affiliation: School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China. Electronic address: mylongwayhome@hotmail.com.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
mesh_terms: D000327:Adsorption; D002384:Catalysis; D054879:Halogenation; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D010416:Pentachlorophenol / Q000737:chemistry / Q000302:isolation & purification*; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D058185:Magnetite Nanoparticles; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D010416:Pentachlorophenol; D007501:Iron
keywords: Dechlorination; Fenton reaction; Hydrogen peroxide; Magnetite; Pentachlorophenol; Zero-valent iron nanoparticles