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Human and Ecological Risk Assessment: An International Journal Volume 12, 2006 - Issue 2
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Remediation of Persistent Toxic Substances

Comparison of Photocatalytic Oxidation and Ozonation in Degrading of Polycyclic Aromatic Hydrocarbons

H. Y. Yip Department of Biology, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China
,
S. W. Chiu Department of Biology, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China; Environmental Science Programme, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China
,
J. C. M. Yu Environmental Science Programme, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China; Department of Chemistry, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China
&
P. K. Wong Department of Biology, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China; Environmental Science Programme, The Chinese University of Hong Kong, Hong Kong SAR, P. R. China
Pages 270-276 | Published online: 18 Jan 2007
 
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ABSTRACT

Polycyclic aromatic hydrocarbons (PAHs) are hazardous pollutants. Photocatalytic oxidation (PCO) was used to degrade individual PAHs dissolved in aqueous solution and results were compared to those used for ozonation treatment of PAHs in aqueous phase and adsorbed on soil reported previously. Both PCO and ozonation showed high effectiveness and efficiency in degrading PAHs within only minutes of time. Ozonation showed higher performance in the degradation of PAHs in aqueous solution than in soil, whereas the treatment efficiency of PCO was higher than that of ozonation in degrading PAHs in aqueous solution. Both methods have advantages over each other but they have their own limitation(s) in practical application.

ACKNOWLEDGMENTS

The study was partially supported by a research grant from the Research Grants Council, Hong Kong SAR Government.

Notes

*NA = not available.

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