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Study on the degradation of Acid Yellow 17 by combination of UV/TiO2 and Ultrasonic Processes
|關鍵字:||Sonophotocatalytic;偶氮染料;UV/TiO2;Acid Yellow 17;Fenton-like;二氧化鈦;超音波;鐵離子||出版社:||環境工程學系所||摘要:||
本研究為結合UV/TiO2程序與超音波程序降解偶氮染料Acid Yellow 17之實驗，探討pH值、染料初始濃度、TiO2添加量、二價鐵與三價鐵添加量對整體去除效率之影響。
The degradation of Acid Yellow 17 was investigated by means of photocatalysis and ultrasound irradiation. The effects of parameters such as pH, initial concentration of dye, TiO2, addition of Fe2+ and Fe3+ were studied. Experiments were conducted at an ultrasound intensity of 10 W and a 13 W UVA lamps and a synergistic effect between sonolysis and photocatalysis was observed. The physicochemical properties of TiO2 were characterized by using BET surface area, XRD and FE-SEM. The results show that there was no significant change in crystal structure and appearance on TiO2, but the specific surface area of TiO2 was increased by about 53%. For the cases studied, there was no hydrogen peroxide formation(<1 mg/L), so the Fenton-like reaction was not significant. Fe3+ and Fe2+ were found to affect both the adsorption equilibrium on TiO2 and the degradation efficiency, and Fe3+ had the better results than Fe2+.
|Appears in Collections:||環境工程學系所|
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