窖水中主要无机离子对光催化灭除大肠杆菌(E.coli)的影响研究

Influence Study of Major Inorganic Ions in Pit Water on Photocatalytic Elimination of Escherichia Coli(E.coli)

采用自主开发的N-TiO_2作为光催化剂,在流动相光催化反应装置中,对窖水中所含Ca^(2+)、Cl^-、CO_3^(2-)、HCO_3^-、SO_4^(2-)等主要无机离子对光催化剂灭除E.coli的影响,以及复配模拟窖水和实际窖水对光催化灭除E.coli的影响进行了实验研究,并分析了其影响机理。实验结果表明:Ca^(2+)、HCO_3^-对光催化灭除E.coli有抑制作用,CO_3^(2-)对光催化灭除E.coli有明显的促进作用,而SO_4^(2-)、Cl^-对光催化灭除E.coli无影响。在对实际窖水进行光催化灭除E.coli菌落总数的实验中,经60min反应,窖水中菌落总数和总大肠菌群均为零,达到国家饮用水卫生标准,说明自主开发的NTiO_2光催化剂在农村窖水深度处理灭除E.coli效果好,可推广应用。

Using self-developed N-TiO2as photocatalyst,in a mobile phase photocatalytic reactor’effect of the main inorganic ions such as Ca2,Cl,CO3,HCO3and SO4containing in pit water on the photocatalytic elimination of E.coli and effect of compound simulation pit water and elimination of E.coli were studied,the influence mechanism was also analyzed.The experimental results showed that Ca2and HCO3inhibited the photocatalytic elimination of E.coli,and CO3promotedthe photocatalytic elimination of E.coli,while SO4and Cl had no effect on photocatalytic elimination of E.and coli.In the experiment of photocatalytic elimination of E.coli aerobic bacterial count for actual pit water,through60min reaction?the aerobic bacterial count in pit water and total coliform were zero,Reached the national drinking water standard,which indicated the effect of self-developed N-TiO2photocatalyst elimination of E.coli in rural pit water depth processing was good?and it could be popularized and applied.