B. Sun et al., Oxidative processes occurring when pulsed high voltage discharges degrade phenol in aqueous solution, ENV SCI TEC, 34(3), 2000, pp. 509-513
Citations number
39
Categorie Soggetti
Environment/Ecology,"Environmental Engineering & Energy
In this investigation, results obtained using a pulsed discharge for organi
c compound removal are presented. The degradation of phenol by a streamer c
orona discharge and spark discharge, the effects of hydrogen peroxide addit
ive on removal efficiency, and photochemical oxidation by ultraviolet light
from the discharge plasma channel were investigated. The intermediate prod
ucts and final byproducts formed by the spark discharge were also studied.
A preliminary study of the degradation mechanism inside and outside the pla
sma channel was carried out. It was found that the removal efficiency of or
ganic contaminants in the aqueous solution was higher for the spark dischar
ge than for the streamer corona discharge and was greatly influenced by the
discharge type and additive. The energy efficiency was the highest (6.91 x
10(-3) mu mol/J) for the case with hydrogen peroxide injection and spark d
ischarge. The main intermediate products produced by the spark discharge du
ring the treatment process were hydroquinone, pyrocatechol, and p-benzoquin
one. These intermediate products disappeared when the treatment time was in
creased.