摘要
研究不同pH值条件下低温强化混凝对某水源水中有机物的去除效果和去除机理,为微污染水源水饮用处理工艺在低温条件下达标提供方法和参数。采用烧杯混凝试验,测定混凝对高锰酸盐指数（CODMn）、紫外吸光度（UV254）的去除率,分析强化混凝去除有机物的分子量范围和有机物类型。通过降低pH值,强化混凝可明显提高对CODMn和UV254的去除效率,特别提高了对分子量在1-4 k范围的溶解性有机物的去除率;被强化混凝去除的有机物主要是可被活性炭吸附和难生物降解的部分;由此得出强化混凝是低温条件下去除水中有机物和消毒副产物（DBPs）前质的有效手段。
The natural organic matter removal efficiency and mechanism of enhanced coagulation for polluted source water treatment under low temperatures at different coagulation pHs were studied through bench scale tests in this paper. The results showed that, the removal rate of CODMn and UV254 were increased obviously by enhanced coagulation with pHs declined, and the removal rate of dissolved organic carbon with molecular weight ranging from lk to 4k was increased greatly. The removed organic matters by en- hanced coagulation were adsorbed and non-degradable. The enhanced coagulation was the valid means to remove organic matters and disinfection by-products precursors for polluted source water treatment under low temperatures.
出处
《中国农村水利水电》
北大核心
2008年第7期52-55,共4页
China Rural Water and Hydropower
关键词
强化混凝
微污染水源水
饮用水
enhanced coagulation
micropolluted source water
drinking water
