Optimized photocatalytic degradation of Alcian Blue 8 GX in the presence of TiO₂ suspensions

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• 作者：Anca Florentina Caliman ; Corneliu Cojocaru ; Apostolos Antoniadis ; Ioannis Poulios
• 关键词：Heterogeneous photocatalysis ; Alcian Blue 8 GX ; TiO₂ ; Biomedical wastewater ; Optimization
• 刊名：Journal of Hazardous Materials
• 出版年：2007
• 出版时间：1 June 2007
• 年：2007
• 卷：144
• 期：1-2
• 页码：265-273
• 全文大小：420 K

文摘

The photocatalytic degradation of Alcian Blue 8 GX, a cationic copper phthalocyanine dye, has been investigated in aqueous suspensions containing the commercial catalyst TiO₂ P-25. The photodegradation of the organic molecule follows approximately a pseudo-first kinetic order, according to the Langmuir–Hinshelwood model. The effect of catalyst concentration, pH of the initial solution and the H₂O₂ concentration upon the reaction rate was ascertained. It was shown that the photocatalytic degradation reaction can be mathematically described as a function of parameters such as pH, H₂O₂ concentration and irradiation time, being modeled by the use of the response surface methodology. Optimized values for oxidizing agent, concentration, pH and UV exposure time for the studied system were determined.