Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos SP, Brazil.
Water Sci Technol. 2010;61(2):491-8. doi: 10.2166/wst.2010.870.
In the present study, photo-assisted electrochemical degradation of real textile wastewater was performed. Degradation assays were performed at constant current (40 mA cm(-2)) in a combined electro/photochemical flow-cell using a Ti/Ru(0.3)Ti(0.7)O(2) DSA type electrode. The results show that the method is capable of removing color and chemical oxygen demand (COD) from the effluent. Additionally, the effect of initial pH and type of supporting electrolyte (Na(2)SO(4) or NaCl) was investigated. The principal figures of merit used in this study were COD removal and color removal (605 nm). The results show that up to 72% color and up to 59% COD removal in 120 min is possible under the operating conditions employed. Studies of the phytotoxicity of the wastewater before and after the photo-assisted degradation assays are also presented and the results demonstrate that the toxicity of the effluent is dependent on the length of electrolysis time and the treatment procedure employed.
本研究采用光电协同电化学法处理实际纺织废水。在采用 Ti/Ru(0.3)Ti(0.7)O(2) DSA 型电极的组合式电/光化学流动池中，在恒流（40 mA cm(-2))条件下进行降解实验。结果表明，该方法能够有效去除废水中的颜色和化学需氧量（COD）。此外，还考察了初始 pH 值和支持电解质（Na(2)SO(4)或 NaCl）类型的影响。本研究采用的主要评价指标为 COD 去除率和颜色去除率（605nm）。结果表明，在实验采用的操作条件下，经过 120min 处理，废水的颜色去除率最高可达 72%，COD 去除率最高可达 59%。本研究还对光电协同降解前后废水的植物毒性进行了研究，结果表明，废水的毒性取决于电解时间的长短和所采用的处理程序。
