Vacuum-UV radiation at 185 nm in water treatment--a review.
The vacuum-UV radiation of water results in the in situ generation of hydroxyl radicals. Low-pressure mercury vapor lamps which emit at 185 nm are potential sources of VUV radiation. The scope of this article is to give an overview of the application of VUV radiation at 185 nm for water treatment including the transformation of inorganic and organic water constituents, and the disinfection efficiency. Another focus is on the generation of ozone by VUV radiation from oxygen or air and the application of the produced ozone in combination with VUV irradiation of water in the VUV/O3 process. The advantages and limitation of the VUV process at 185 nm as well as possible applications in water treatment are outlined.
Institute of Water Chemistry, Technische Universität Dresden, 01062 Dresden, Germany. Electronic address: kristin.zoschke@tu-dresden.de.
Kristin
K
Zoschke
Institute of Water Chemistry, Technische Universität Dresden, 01062 Dresden, Germany.
Hilmar
H
Börnick
Institute of Water Chemistry, Technische Universität Dresden, 01062 Dresden, Germany.
Eckhard
E
Worch
D004203:Disinfection; D004867:Equipment Design; D017665:Hydroxyl Radical; D010126:Ozone / Q000737:chemistry; D014466:Ultraviolet Rays; D014618:Vacuum; D018508:Water Purification / Q000191:economics* / Q000295:instrumentation / Q000379:methods*
D017665:Hydroxyl Radical; D010126:Ozone
185 nm; Disinfection; Micropollutant removal; Ozone generation; Vacuum-UV irradiation; Water treatment