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Received April 18, 1991,Revised , Accepted , Available online

Volume 4,1992,Pages 97-105

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The photocatalytic degradation of reactive dyes with solar-irradiated TiO2 was investigated in these experiments which showed that: (1)the decolourization efficiency are determined by pH value, catalyst amount and light intensity; (2) the reactive dyes decolourized rapidly (cleavageld be biologically degradated more easily, the toxicity decreased considerably after photodegradation.The results demonstrated that the photocatalytic process would become an efficient and safe method for colour wastewater treatment and would be very useful for explaining the reaction mechanism and decolourising structure-reactivity relationship. of the azo linkage), but the intermediates needed more time to transform to further degradation products, and finally to produce CO2; (3) the main products were identified to be alkanes and alkyl amines which cou

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