塑化剂中使用最普遍的邻苯二甲酸酯(PAEs)是一类典型的环境内分泌干扰物，被认定为“第二个全球性PCB 污染物”，在多个国家和地区被列为“优先控制污染物”。PAEs在水环境中的溶出和蓄积已严重威胁到水生生物及人类的安全和健康，因而水体中 PAEs的去除是一个亟待深入研究的课题。本项目将采用光催化氧化技术在模拟太阳光的条件下降解典型的PAEs，主要研究：(1)利用稀土元素具有不完全的4f和5d电子填充轨道而产生的性能制备稀土改性Bi2WO6(RE/Bi2WO6)催化剂以调变Bi2WO6的可见光光催化活性；(2)通过多种表征手段和制备条件的设计考察不同电子填充轨道的稀土元素对Bi2WO6光催化活性的影响；(3) 考察在降解过程中催化剂投加量、PAEs初始浓度、反应时间、添加剂等因素对PAEs 去除的影响；(4)分析RE/Bi2WO6的活性机理以及PAEs的降解历程。

Characters)：Phthalic acid esters (PAEs) are one kind of typical endocrine disruptors, which are widely used as plasticizers. Some PAEs have been detected in various environmental waters, such as surface waters, freshwaters, mineral waters, seawaters and urban lakes, which result in physiological and biochemical effects on organisms and human. Nowdays, PAEs have been paid attentions in the world. Some PAEs, such as dimethyl phthalate (DMP), di-n-butyl phthalate (DBP), diethyl phthalate (DEP), di-octyl phthalate (DOP) and di-(2-ethylhexyl) phthalate (DEHP), have been listed as priority pollutants by the U.S. Environmental Protection Agency, European Union and China National Environmental Monitoring Centre. It’s meaningful to study the degradation of PAEs in water, the removal pathway of PAEs, and the analysis of byproducts during the degradation process of PAEs. This project intends to the photocatalytic degradation of typical PAEs under simulated solar irradiation by photocatalytic oxidation technology. The main contents of this project includ (1) preparation of rare earth-modified bismuth tungstate oxides (RE/Bi2WO6) according to that rare earth elements with incomplete 4f and 5d orbitals, easy to produce multi-electron configuration, polymorphs, good thermal stability. The doping of appropriate amount of rare earth ions could change the the distribution of charge density in catalyst, the formation of defects, or the lattice type, which would affect the movement of photogenerated electron-hole pairs, adjust the distribution state, or change its energy band structure, and ultimately the photocatalytic properties would be modified; (2) the effects of different rare earth elements, doping amount, temperature of hydrothermal reaction, reaction time and pH of the reaction solution on the photocatalytic activity of RE/Bi2WO6; (3) the effects of different factors on the removal efficicency of PAEs, such as the amount of the photocatalyst, the initial concentration of PAEs, the pH value of reaction solultion, organic matters and inorganic co-ions in the solution; (4) the analysis of intermediates produced during the photocatalytic degradation process and the degradation pathway of PAEs under simulated solar irradiation as well as the degradation mechanism of RE/Bi2WO6. This project will provide a method for the removal of PAEs in water, and be contributed to elucidate the mineralization way of typical PAEs as well as develop the application of visible light photocatalytic oxidiation technology in the environmental pollution treatment.