Effect of iron speciation on the photodegradation of MONURON (cas 150-68-5) in combined photocatalytic systems with immobilized or suspended TiO2
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Add time:09/30/2019 Source:infona.pl
Photodegradation kinetics of MONURON (cas 150-68-5) (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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