Development of Photocatalytic Water Treatment Device for Accelerating Reaction Rate

利用市售的二氧化钛粉末包覆玻璃纤维过滤器，研制了光催化反应装置。在单位光源的反应速率方面，该装置比以往开发的水处理光催化装置性能更高。以溴酸盐离子和苯酚分别作为还原和氧化的模式物质。该装置采用黑光块作为光源，在连续恒流状态下进行分析。根据Langmuir-Hinshelwood方程，用一个新建立的模型解释了苯酚和溴酸盐的反应速率，包括表面反应、与其他物质的竞争和吸附、还原和氧化。光催化也被成功地用于抑制涂在透明壁上的藻类生长，可能是因为光合作用提供了光催化反应所需的氧气。研究了紫外光的灭活及光催化反应的推进作用。RT-PCR检测噬菌体核酸分解情况。紫外辐射确实分解了核酸，而光催化反应对分解的促进作用没有那么大。

A photocatalytic reaction device was developed using a glass fiber filter coated with titanium dioxide powder commercially available. This device showed a higher performance than other previously developed photocatalytic device for water treatment in terms of reaction rate per unit light soucrce.Bromate ion and phenol was used as a model substances for reduction and oxidation, respectively. This device was analyzed in a continuous constant flow state, using a black light lump as the light source. Reaction rate both of phenol and bromate was explained using a newly developed model following the Langmuir-Hinshelwood equation, including surface reaction, competition with other substances and adsorption, as well as reduction and oxidation.Photocatalysis were also successfully used for suppress of algal growth coated on a transparent wall, probably because photosynthesis provided oxygen used in a photocatalytic reaction.Inactivation by UV radiation as well as the advance effect of photocatalytic reaction was studied. Decomposition of nucleic acids of bacteriophage was determined using RT-PCR. UV radiation did decompose the nucleic acids, while photocatalytic reaction did not enhance decomposition so much.