| 저자(한글) |
Zhang, L.,Xing, Z.,Zhang, H.,Li, Z.,Wu, X.,Zhang, X.,Zhang, Y.,Zhou, W. |
| 초록 |
Utilizing high thermostable ordered mesoporous SiO 2 -TiO 2 as a precursor, macroporous polyurethane foam (PUF) as a floating biofilm carrier, the photocatalytic circulating-bed biofilm reactor (PCBBR) is fabricated via ultrasonic vibration and deposition approach. The prepared SiO 2 -TiO 2 /PUF carrier is characterized in detail by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, N 2 adsorption, scanning electron microscopy and energy dispersive spectroscopy. The results indicate that the ordered mesoporous SiO 2 -TiO 2 network can be maintained and the presence of SiO 2 can inhibit the anatase-to-rutile phase transformation during 800 o C calcinations. Furthermore, the prepared SiO 2 -TiO 2 /PUF carrier presents a hierarchical macro/mesoporous structure, filling the bacterium to the channels. The PCBBR exhibits good synergic effect for the refractory phenolic wastewater, and the total organic carbon removal ratio of high toxic 2,4,5-trichlorophenol is up to 97.5% after hydraulic retention time for 3h, which is ascribed to the hierarchical macro/mesoporous structure in favor of pollutants adsorption, efficient photon utilization and microorganism loading. This novel ordered mesoporous SiO 2 -TiO 2 coated circulating-bed biofilm reactor is promising in the environmental field. |
