Development of Adsorption-photodegradation

被称为内分泌干扰物的化学物质已经散布在环境中，影响了地球上某些生物的生殖功能，因此，需要对此事采取迅速行动。本研究的目的是了解水中稀释内分泌干扰物吸附-光降解系统的基本原理，并对该系统进行开发。第一年，在建立了系统活性的简单估计方法后，我们研究了两种降解邻苯二甲酸二丁酯（DBF）的系统。一种体系是钛柱型粘土催化剂，另一种体系是二氧化硅负载型二氧化钛催化剂。催化剂的表征和吸附-光降解活性的研究结果阐明了(1)吸附量对光降解速率的影响；(2)二氧化钛颗粒的大小和结晶度影响这些活性；(3)水热处理提高了二氧化钛的结晶度。（iv）我们的系统在阳光下工作。此外，在第二年，我们研究了内分泌干扰物的亲疏水性对系统性能的影响，发现水热处理对二氧化钛结晶度的增强对我们所研究的每种内分泌干扰物都是有效的。

The chemicals called endocrine disrupters have been spread over the environment to influence the generative function of some species of living thing on the earth, and, therefore, the quick actions for this matter are required. The aim of this research is to find out the fundamental aspects on the adsorption-photodegradation system for diluted endocrine disrupters in water, and then to develop the system. In the first year, after establishing a simple estimation method for the activity of the system, we studied two systems for the degradation of dibutyl phthalate (DBF). One system was titania-pillared clay catalysts, and another was silica-supported titania catalysts. The results on the characterization of the catalysts and the activity for adsorption-photo-degradation clarified some aspects, e.g., (I) the adsorption amount influences on the photodegradation rate, (ii) the size and the crystallinity of the titania particle influence these activities, (iii) the hydrothermal treatment enhances the crystallinity of titania. (iv) our systems work under sunshine. In addition to them, in the second year, we investigated the influence of hydrophilicity/hydrophobicity of endocrine disrupters on the performance of the systems, and found that the enhanced crystallinity of titania by hydrothermal treatment were effective for each endocrine disruptors we examined.