Selcuk H, Sene J J, Sarikaya H Z, Bekbolet M, Anderson M A
Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, Turkey.
Water Sci Technol. 2004;49(4):153-8.
This study addresses the application of a photoelectrocatalytic (PEC) system with separated hole and electron reactions to treat humic acid (HA) from river water. A TiO2 electrode, coated by the sol-gel method, is used for that purpose. The degradation of humic acid in the river water was followed with respect to time using parameters of UV254, color and total organic carbon (TOC). For comparison purposes the photocatalytic (PC) removal of HA was also studied on the same photoanode. The obtained results showed that the PEC system was much more effective than the PC method. The effect of other important reaction variables, such as external potential, oxygen and UV intensity on HA degradation were also investigated. For all the external applied potential conditions and UV intensity range over 90% removal of UV254 and color were obtained with the PEC system while TOC removal was between 58-80%.
本研究探讨了一种具有分离空穴和电子反应的光电催化（PEC）系统用于处理河水中腐殖酸（HA）的应用。为此使用了通过溶胶 - 凝胶法涂覆的TiO₂电极。利用UV254、颜色和总有机碳（TOC）参数跟踪河水中腐殖酸随时间的降解情况。为作比较，还在同一光阳极上研究了腐殖酸的光催化（PC）去除。所得结果表明，PEC系统比PC方法有效得多。还研究了其他重要反应变量，如外部电势、氧气和紫外线强度对腐殖酸降解的影响。在所有外部施加电势条件和紫外线强度范围内，PEC系统对UV254和颜色的去除率超过90%，而TOC去除率在58 - 80%之间。
