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Int. J. Environ. Res. Public Health 2010, 7(11), 3987-4001; doi:10.3390/ijerph7113987
Article

Photodegradation of Selected PCBs in the Presence of Nano-TiO2 as Catalyst and H2O2 as an Oxidant

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Received: 8 October 2010; in revised form: 25 October 2010 / Accepted: 12 November 2010 / Published: 15 November 2010
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Abstract: Photodegradation of five strategically selected PCBs was carried out in acetonitrile/water 80:20. Quantum chemical calculations reveal that PCBs without any chlorine on ortho-positions are closer to be planar, while PCBs with at least one chlorine atoms at the ortho-positions causes the two benzene rings to be nearly perpendicular. Light-induced degradation of planar PCBs is much slower than the perpendicular ones. The use of nano-TiO2 speeds up the degradation of the planar PCBs, but slows down the degradation of the non-planar ones. The use of H2O2 speeds up the degradation of planar PCBs greatly (by >20 times), but has little effect on non-planar ones except 2,3,5,6-TCB. The relative photodegradation rate is: 2,2’,4,4’-TCB > 2,3,5,6-TCB > 2,6-DCB ≈ 3,3’,4,4’-TCB > 3,4’,5-TCB. The use of H2O2 in combination with sunlight irradiation could be an efficient and “green” technology for PCB remediation.
Keywords: photodegradation; PCBs; H2O2; dechlorination; TiO2 photodegradation; PCBs; H2O2; dechlorination; TiO2
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Dasary, S.S.R.; Saloni, J.; Fletcher, A.; Anjaneyulu, Y.; Yu, H. Photodegradation of Selected PCBs in the Presence of Nano-TiO2 as Catalyst and H2O2 as an Oxidant. Int. J. Environ. Res. Public Health 2010, 7, 3987-4001.

AMA Style

Dasary SSR, Saloni J, Fletcher A, Anjaneyulu Y, Yu H. Photodegradation of Selected PCBs in the Presence of Nano-TiO2 as Catalyst and H2O2 as an Oxidant. International Journal of Environmental Research and Public Health. 2010; 7(11):3987-4001.

Chicago/Turabian Style

Dasary, Samuel S. R.; Saloni, Julia; Fletcher, Amanda; Anjaneyulu, Yerramilli; Yu, Hongtao. 2010. "Photodegradation of Selected PCBs in the Presence of Nano-TiO2 as Catalyst and H2O2 as an Oxidant." Int. J. Environ. Res. Public Health 7, no. 11: 3987-4001.



Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert