Pamukkale University, Engineering Faculty, Environmental Engineering Department, Kinikli-Denizli 20074, Turkey.
Water Res. 2010 Jul;44(13):3966-72. doi: 10.1016/j.watres.2010.04.034. Epub 2010 May 24.
In this study, disinfection and formation of disinfection by-products (DBPs) were studied in a photoelectrocatalytic (PEC) treatment system. Disinfection performance of titanium dioxide (TiO(2)) in the PEC system was determined through Escherichia coli (E. coli) inactivation. Humic acid (HA) was used as a model organic compound and its removal was monitored by total organic carbon (TOC) measurements using 410 nm (color) and 254 nm (UV(254)) wavelengths. Trihalomethanes (THMs) were measured for the evaluation of DBPs formation during PEC treatment of chloride and HA mixture. It was found that unlike photocatalytic treatment, THMs might form in the PEC system. To investigate the effects of anions on the PEC treatment, chloride (Cl(-)), sulfate (SO(4)(2-)), phosphoric acid (H(2)PO(4)(-))/hydrogen phosphate (HPO(4)(2-)) and bicarbonate (HCO(3)(-)) ions were added separately to the HA and bacterial suspensions. Presence of H(2)PO(4)(-)/HPO(4)(2-) and HCO(3)(-) ions resulted in inhibitory effects on both HA degradation and E. coli inactivation, which were also examined in the photoanode. It was observed that the presence of HA had a strong inhibitory effect on the disinfection of E. coli.
在这项研究中，我们研究了光电催化（PEC）处理系统中的消毒和消毒副产物（DBPs）的形成。通过大肠杆菌（E. coli）失活来确定 TiO2 在 PEC 系统中的消毒性能。腐殖酸（HA）被用作模型有机化合物，并通过总有机碳（TOC）测量来监测其去除情况，使用 410nm（颜色）和 254nm（UV（254））波长。三卤甲烷（THMs）用于评估 PEC 处理氯和 HA 混合物过程中 DBPs 的形成。结果发现，与光催化处理不同，PEC 系统中可能会形成 THMs。为了研究阴离子对 PEC 处理的影响，分别向 HA 和细菌悬浮液中添加了氯离子（Cl(-)）、硫酸根离子（SO(4)(2-)）、磷酸氢根离子（H(2)PO(4)(-)）/磷酸二氢根离子（HPO(4)(2-)）和碳酸氢根离子（HCO(3)(-)）。H(2)PO(4)(-) / HPO(4)(2-)和 HCO(3)(-)离子的存在对 HA 降解和 E. coli 失活均有抑制作用，这一点也在光电阳极中进行了研究。结果表明，HA 的存在对 E. coli 的消毒有很强的抑制作用。
