论文部分内容阅读
消毒副产物(disinfection by-products,DBPs)有机前驱物是饮用水消毒过程DBPs生成的重要反应物。饮用水处理各工艺对有机前驱物去除效率意义重大。本文一方面调查了饮用水处理各个工艺的有机前驱物去除效果,另一方面又分析了这些有机物去除对碘代三卤甲烷(iodinated trihalomethanes,I-THMs)生成情况的影响。受到不同有机前驱物结构与性质的差异,活性炭吸附和生物预处理对以太湖为原水的WDWTP水厂中的藻类有机物(algal organic matter,AOM)组分去除有效,而臭氧工艺对以长江为原水的YDWTP水厂的AOM有一定去除效率,但是也增加了部分碘离子的释放。I-THMs在WDWTP水厂原水与出水的浓度分别为53.9 ng·L~(-1)与206.2 ng·L~(-1),而在YDWTP则分别为38.0 ng·L~(-1)和30.3ng·L~(-1)。
Disinfection by-products (DBPs) Organic precursors are important reactants for DBPs generated during drinking water disinfection. Drinking water treatment processes are significant for the removal efficiency of organic precursors. On the one hand, the removal efficiencies of organic precursors in each process of drinking water treatment were investigated. On the other hand, the effects of removal of these organic compounds on the formation of iodinated trihalomethanes (I-THMs) were analyzed. Due to the differences in structure and properties of different organic precursors, activated carbon adsorption and biological pretreatment are effective in removing algal organic matter (AOM) components in the WDWTP water plant that uses Taihu Lake as raw water. However, AOM of YDWTP water plant has certain removal efficiency, but also increases the release of some iodine ions. The concentrations of I-THMs in water and effluent of WDWTP were 53.9 ng · L -1 and 206.2 ng · L -1, respectively, while those of YWWTP were 38.0 ng · L -1 and 30.3ng · L -1.