Journal of Hazardous Materials 2016-02-13

Decomposition of perfluorooctanoic acid by ultraviolet light irradiation with Pb-modified titanium dioxide.

Meng-Jia Chen, Shang-Lien Lo, Yu-Chi Lee, Jeff Kuo, Chung-Hsin Wu

Index: J. Hazard. Mater. 303 , 111-8, (2015)

Full Text: HTML

Abstract

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 0.5136 h(-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(-).Copyright © 2015 Elsevier B.V. All rights reserved.

Related Compounds

  • Perfluorohexanoic...
  • Perfluoroheptanoic...
  • Pentafluoropropano...

Related Articles:

Occurrence of perfluorinated alkyl substances in sediment from estuarine and coastal areas of the East China Sea.

2015-02-01

[Environ. Sci. Pollut. Res. Int. 22(3) , 1662-9, (2015)]

Determination of perfluorinated alkyl acids in corn, popcorn and popcorn bags before and after cooking by focused ultrasound solid-liquid extraction, liquid chromatography and quadrupole-time of flight mass spectrometry.

2014-08-15

[J. Chromatogr. A. 1355 , 211-8, (2014)]

Chemometric strategy for untargeted lipidomics: biomarker detection and identification in stressed human placental cells.

2015-01-07

[Anal. Chim. Acta 854 , 20-33, (2014)]

Development of an analytical method for the targeted screening and multi-residue quantification of environmental contaminants in urine by liquid chromatography coupled to high resolution mass spectrometry for evaluation of human exposures.

2016-01-01

[Talanta 146 , 694-706, (2015)]

Microminipigs as a new experimental animal model for toxicological studies: comparative pharmacokinetics of perfluoroalkyl acids.

2016-01-01

[J. Appl. Toxicol. 36 , 68-75, (2015)]

More Articles...