三种光敏剂介导的光动力对水体中8种多环芳烃的降解作用

为了探究不同光敏剂(姜黄素、核黄素、金丝桃素)介导的光动力对水体中多环芳烃的降解作用,以含有8种多环芳烃的水体为研究对象,在光敏剂浓度为10μM,光照时间为15 min的条件下,采用光动力方法处理并通过同步荧光法测定水体中的各种多环芳烃。结果表明,姜黄素介导的光动力对多环芳烃的降解效果明显优于核黄素和金丝桃素介导的光动力组。经姜黄素光动力处理后,水体中的8种多环芳烃均发生一定程度的降解,其中,荧蒽和菲的降解率分别为77.07%和78.31%,苯并k]荧蒽和?的降解率分别为80.10%和85.95%,苯并a]芘、萘、苯并a]蒽和蒽的降解率达到95%以上。以上研究表明,与其他两种光敏剂相比,姜黄素介导的光动力对水溶液中的8种多环芳烃均具有显著的降解效果,为该技术在生活用水以及养殖水体污染治理方面的推广应用提供理论依据。

Degradation Effect of Three Photosensitizers-Mediated Photodynamic Technology on Eight Polycyclic Aromatic Hydrocarbons in Water

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 10μM photosensitizer concentration and 15 min 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 benzok]fluoranthene and chrysene were 80.10%and 85.95%,respectively.The degradation rates of benzoa]pyrene,naphthalene,benzoa]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.