Sep 10, 2010

Studies on photo-electron-chemical catalytic degradation of the malachite green

Huan jing ke xue= Huanjing kexue
Mingyu LiYuan-ming Zhang


A novel two-compartment photo-electro-chemical catalytic reactor was designed. The TiO2/Ti thin film electrode thermally formed was used as photo-anode, and graphite as cathode and a saturated calomel electrode (SCE) as the reference electrode in the reactor. The anode compartment and cathode compartment were connected with the ionic exchange membrane in this reactor. Effects of initial pH, initial concentration of malachite green and connective modes between the anode compartment and cathode compartment on the decolorization efficiency of malachite green were investigated. The degradation dynamics of malachite green was studied. Based on the change of UV-visible light spectrum, the degradation process of malachite green was discussed. The experimental results showed that, during the time of 120 min, the decolouring ratio of the malachite green was 97.7% when initial concentration of malachite green is 30 mg x L(-1) and initial pH is 3.0. The catalytic degradation of malachite green was a pseudo-first order reaction. In the degradation process of malachite green the azo bond cleavage and the conjugated system of malachite green were attacked by hydroxyl radical. Simultaneity, the aromatic ring was oxidized. Finally, malachite g...Continue Reading

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Mentioned in this Paper

Rosaniline Dyes
Natural graphite
Pseudo brand of pseudoephedrine
Cytokinesis of the Fertilized Ovum
Malachite green, oxalate (4: 1)
Landfill Leachate

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