Zhang Lianfeng, Kanki Tatsuo, Sano Noriaki, Toyoda Atsushi
Department of Chemical Engineering, University of Waterloo, Faculty of Engineering, Waterloo, Ontario, Canada.
Environ Monit Assess. 2006 Apr;115(1-3):395-403. doi: 10.1007/s10661-006-7236-y. Epub 2006 Apr 16.
In this study, the TiO2 photocatalytic decomposition process of aqueous phenol was investigated. The intermediate products generated in the elementary reaction steps in the mineralization process were experimentally identified as hydroquinone, catechol and hydroxyhydroquinone. The concentration variations of these intermediate products with time passage were traced by high performance liquid chromatograph. The pathways of the decomposition process were given. Based on Langmuir isothermal theory and Langmuir-Hinshelwood mechanism, the multi-compounds competition kinetic model was established. In this model, the observed time-dependent concentrations of phenol and the intermediate products were simulated.
本研究考察了TiO₂光催化分解水溶液中苯酚的过程。通过实验确定了矿化过程中基本反应步骤产生的中间产物为对苯二酚、邻苯二酚和羟基对苯二酚。采用高效液相色谱仪追踪这些中间产物的浓度随时间的变化情况。给出了分解过程的途径。基于朗缪尔等温理论和朗缪尔 - 欣谢尔伍德机理，建立了多化合物竞争动力学模型。在该模型中，模拟了观察到的苯酚和中间产物随时间变化的浓度。
