Degradation Effect of Three Photosensitizers-Mediated Photodynamic Technology on Eight Polycyclic Aromatic Hydrocarbons in Water
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Abstract:
This study aims to explore the degradation effect of different photosensitizers (curcumin, riboflavin, hypericin)-mediated photodynamic technology on polycyclic aromatic hydrocarbons (PAHs) in water. 8 PAHs mixed aqueous solution was taken as the research object. Under the condition of 10 μM photosensitizer concentration and 15min illumination time, the mixture was treated by photodynamic technology (PDT) and the PAHs were determined by synchronous fluorescence method. The results showed that the degradation of PAHs by curcumin-mediated photodynamic was significantly better than that of riboflavin and hypericin-mediated photodynamic groups. After photodynamic treatment of curcumin, 8 kinds of PAHs in the mixture were degraded to some extent. The degradation rates of fluoranthene and phenanthrene were 77.07% and 78.31 %, respectively. The degradation rates of benzo [k] fluoranthene and chrysene were 80.10% and 85.95%, respectively. The degradation rates of benzo [a] pyrene, naphthalene, benzo [a] anthracene and anthracene were more than 95%. Our research showed that compared with the other two photosensitizers, curcumin-mediated photodynamic had a significant effect on the degradation of 8 PAHs in aqueous solution, which provides a theoretical basis for the promotion and application of this technology in the pollution control of living and aquaculture water.
