期刊
ENVIRONMENTAL CHEMISTRY LETTERS
卷 7, 期 2, 页码 127-132出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10311-008-0145-2
关键词
Photocatalysis; Titanium dioxide; Iron Fe(III)/Fe(II); Monuron; Suspension; Immobilized photocatalyst; Combined system
Photodegradation kinetics of Monuron (3-(4-chlorophenyl)-1,1-dimethylurea) in photoreactor with immobilized and suspended TiO2 photocatalyst were studied. The effect of addition of ferric or ferrous perchlorate was investigated. Whatever the concentration of Fe(III/II) added there is no significant negative effect on the photodegradation rate of pollutants. On the contrary, depending on speciation and concentration of iron salts, slight or marked acceleration of the photodegradation kinetics was observed. This positive influence was more pronounced in the case of TiO2 suspensions than for TiO2 layers. Fe(III) was generally more effective than Fe(II).
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