https://scholars.lib.ntu.edu.tw/handle/123456789/463301
標題: | Decomposition of perfluorooctanoic acid by ultraviolet light irradiation with Pb-modified titanium dioxide | 作者: | Chen, M.-J. Lo, S.-L. Lee, Y.-C. Kuo, J. Wu, C.-H. SHANG-LIEN LO |
關鍵字: | Pb; Perfluorooctanoic acid; Photocatalysis; Titanium dioxide | 公開日期: | 2016 | 卷: | 303 | 起(迄)頁: | 111-118 | 來源出版物: | Journal of Hazardous Materials | 摘要: | Perfluorooctanoic acid (PFOA, C7H15COOH) is widely used in industrial and commercial applications. It has become a global concern due to its widespread occurrence in water bodies and adverse environmental impact. PFOA could not be effectively removed by the conventional UV/TiO2 system. This study synthesized Pb-modified TiO2 catalyst and used it as a catalyst with light irradiation for PFOA decomposition. It was found that the Pb-TiO2 catalyst could produce traps to capture photo-induced electrons or holes that lead to better photocatalytic efficiencies. Rate constant values for PFOA decomposition by the UV/TiO2 and UV/Pb-TiO2 systems were determined to be 0.0158 and 0.5136h-1, respectively. The PFOA decomposition in the UV/Pb-TiO2 system is 32.5 times faster than that in the UV/TiO2 system. The UV/Pb-TiO2 system yielded a better performance than those of the UV/Fe-TiO2 and UV/Cu-TiO2 systems. During the reaction, PFOA decomposed stepwisely into shorter-chain perfluorocarboxylic acids and F-. © 2015 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/463301 | DOI: | 10.1016/j.jhazmat.2015.10.011 | SDG/關鍵字: | Catalysts; Environmental impact; Irradiation; Oxides; Photocatalysis; Rate constants; Titanium; Titanium dioxide; Adverse environmental impacts; Commercial applications; Constant values; Light irradiations; Perfluorocarboxylic acid; Perfluorooctanoic acid; Photocatalytic efficiency; Ultraviolet light irradiation; Lead; lead; perfluorooctanoic acid; titanium dioxide; carboxylic acid; catalyst; decomposition; electron; environmental impact; irradiation; lead; photolysis; pollutant removal; titanium; ultraviolet radiation; aqueous solution; Article; catalyst; controlled study; decomposition; electron; irradiation; photocatalysis; rate constant; reaction analysis; ultraviolet radiation; waste water management |
顯示於: | 環境工程學研究所 |
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