Photochemical treatment of 2-chlorophenol aqueous solutions using ultraviolet radiation, hydrogen peroxide and photo-Fenton reaction.
In the present work, the photochemical oxidation of 2-chlorophenol aqueous solutions in a batch recycle photochemical reactor using ultraviolet irradiation and hydrogen peroxide was studied. Specifically, the effect of hydrogen peroxide initial concentration (0-10316 mg L(-1)) and 2-chlorophenol initial concentration (150-3000 mg L(-1)) was examined. The process was attended via total organic carbon (TOC), 2-chlorophenol, chloride ion, acetic acid, formic acid and pH measurements. The conversion of 2-chlorophenol observed was always much higher than the corresponding total organic carbon removal, whereas the increase in hydrogen peroxide amount in the solution led to higher values of 2-chlorophenol conversion and total organic carbon removal. Finally, the photo-Fenton reaction was applied to the oxidation of 2-chlorophenol, leading to a higher degree of mineralization of the parent compound.
Poulopoulos
S G
SG
Chemical Process Engineering Laboratory, School of Chemical Engineering, National Technical University of Athens, Heroon Politechniou 9, Zografou Campus, Athens, Greece.
Nikolaki
M
M
Karampetsos
D
D
Philippopoulos
C J
CJ
D002712:Chlorides; D002733:Chlorophenols / Q000737:chemistry / Q000528:radiation effects; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010777:Photochemistry; D012996:Solutions; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects; D018508:Water Purification / Q000379:methods
D002712:Chlorides; D002733:Chlorophenols; D005290:Ferric Compounds; D016877:Oxidants; D012996:Solutions; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; C030683:2-chlorophenol; C024555:ferric chloride