Institute for Soil, Water and Air, Faculty of Environmental Science and Process Engineering, Brandenburg University of Technology, Germany.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(8):1073-81. doi: 10.1080/10934529.2012.668026.
The performance of a heterogeneous photocatalytic ozonation system (TiO(2)/UVA/O(3)) was evaluated on the degradation and mineralization of dichloroacetic acid as a contaminant in aqueous solutions by means of a planar reactor. The commercial product "Pilkington Active™ glass" was used as the immobilized TiO(2) photocatalyst and it was irradiated by near UV light in this study. The synergistic interaction between ozone and the photoactivated TiO(2) surface was discussed and highlighted. Furthermore, the influences of initial concentration and temperature on the degradation rate of dichloroacetic acid and the ozone consumption level during the oxidation process were investigated. The concentrations of dichloroacetic acid and chloride anions produced during degradation were measured using ion chromatography. The mineralization of dichloroacetic acid was evaluated by Total Organic Carbon (TOC) measurements. The degradation of dichloroacetic acid by photocatalytic ozonation showed good agreement with the kinetics of first-order reactions with respect to dichloroacetic acid.
采用平面反应器，评价了多相光催化臭氧氧化系统（TiO(2)/UVA/O(3)）对水中二氯乙酸污染物的降解和矿化性能。本研究中使用商业产品“Pilkington Active™玻璃”作为固定化 TiO(2)光催化剂，并利用近紫外光对其进行辐照。讨论并强调了臭氧与光激活的 TiO(2)表面之间的协同相互作用。此外，还考察了初始浓度和温度对二氯乙酸降解速率以及氧化过程中臭氧消耗水平的影响。采用离子色谱法测定降解过程中二氯乙酸和氯离子的浓度。通过总有机碳（TOC）测量评估二氯乙酸的矿化程度。光催化臭氧氧化降解二氯乙酸的反应符合一级动力学反应，且对二氯乙酸呈一级动力学关系。
