Photocatalysis of Clofibric Acid under Solar Light in Summer and Winter Seasons

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• 作者：Wenzhen Li ; Shuguang Lu ; Zhaofu Qiu ; Kuangfei Lin
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：May 4, 2011
• 年：2011
• 卷：50
• 期：9
• 页码：5384-5393
• 全文大小：1033K
• 年卷期：v.50,no.9(May 4, 2011)
• ISSN：1520-5045

文摘

The performance of clofibric acid (CA) degradation in Milli-Q water and wastewater treatment plant (WWTP) effluent by solar/TiO₂ and solar/ZnO was investigated in summer and winter seasons. The effects of NO₃^{鈭?/sup> and HCO₃鈭?/sup> anions, humic acid (HA), and H₂O₂ on CA photocatalysis were evaluated. Significant difference in CA degradation in two seasons was observed. Both NO₃鈭?/sup> and HCO₃鈭?/sup> anions adversely affected CA degradation, particularly at high HCO₃鈭?/sup> concentration. CA degradation slightly increased with 0.5 mg L鈭? HA in solar/TiO₂ in summer, but was significantly inhibited in winter at 20 mg L鈭? HA. However, the inhibitive effect of 20 mg L鈭? HA on CA removal in solar/ZnO had no remarkable difference in two seasons. The degradation in solar/TiO₂/H₂O₂ was similar to that in solar/TiO₂, but was inhibited obviously in solar/ZnO/H₂O₂. When applying photocatalytic process into WWTP effluent, degradation rates were apparently lower compared to Milli-Q water and temperature caused a great adverse effect on CA elimination.}