title: Medium pressure UV combined with chlorine advanced oxidation for trichloroethylene destruction in a model water.
abstract: The effectiveness of ultraviolet (UV) combined with chlorine as a novel advanced oxidation process (AOP) for drinking water treatment was evaluated in a bench scale study by comparing the rate of trichloroethylene (TCE) decay when using UV/chlorine to the rates of decay by UV alone and UV/hydrogen peroxide (H₂O₂) at various pH values. A medium pressure mercury UV lamp was used. The UV/chlorine process was more efficient than the UV/H₂O₂ process at pH 5, but in the neutral and alkaline pH range, the UV/H₂O₂ process became more efficient. The pH effect was probably controlled by the increasing concentration of OCl⁻ at higher pH values. A mechanistic kinetic model of the UV/chlorine treatment of TCE showed good agreement with the experimental data.
authors: Department of Civil Engineering, University of Toronto, 35 St. George St., Toronto, Ontario M5S 1A4, Canada.
authors: Ding
authors: D
authors: Wang
authors: James R
authors: JR
authors: Bolton
authors: Ron
authors: R
authors: Hofmann
mesh_terms: D002713:Chlorine / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010084:Oxidation-Reduction; D011789:Quantum Theory; D014241:Trichloroethylene / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D014241:Trichloroethylene; D002713:Chlorine; D006861:Hydrogen Peroxide