臭氧与混凝组合工艺处理高砷水的试验研究

以高砷饮用水源为研究对象，分析了铁、锰、砷共存水样除砷效果的影响及机理，通过改变不同试验条件，研究了臭氧预氧化以及与混凝结合工艺对于除砷效果的影响，结果表明，臭氧预氧化过程中，铁锰离子单独存在时可以提高除砷效率，其中铁离子除砷效果比锰离子强，当敛锰共存时，锰离子会抑制铁离子的除砷效果；原高砷水经过臭氧预氧化沉淀，除砷的效果明显，当曝气时间为5min，沉淀时间为15min时，砷去除率50％～60％，混凝沉淀与臭氧预氧化结合工艺可大幅度提高除砷的效果。

Research on Process of Ozone Combined with Coagulation for Arsenic Removal in Water of High Arsenic Content

Drinking water source of high arsenic content was studied. Influence of coexistence of iron, manganese, arsenic in water samples on arsenic removal effect and its mechanism were analyzed. Influence of process of ozone pre - oxidation combined with coagulation on arsenic removal effects was studied under different experimental conditions. The results showed that in ozone oxidation process iron or manganese ions alone presence can improve arsenic removal efficiency, in which arsenic removal effect by iron ions is better than by manganese ions. Under conditions of coexistence of iron and manganese ions, arsenic removal effect by iron ions will be inhibited by manganese ions. When original high arsenic content water is pre - oxidized by ozone, arsenic removal effect will be improved. When aeration time is 5 min and settling time 15 min, arsenic removal rate will be 50% - 60%. Process of coagulation and sedimentation combined with oxidation by ozone can significantly improve arsenic removal effect.