高铁酸盐预氧化在混凝过程中的助凝作用

Ferrate Pre-Oxidation Positive Function at the Process Of Coagulation

研究了高铁酸盐预氧化对混凝过程的助凝作用.实验结果表明,在高铁酸盐投加1mg/L时就具有明显的助凝效果,高铁酸盐投加2mg/L时沉淀后水的浊度下降了76%左右,比单独使用硫酸铝的浊度降低了20%～25%,同时高铁酸盐预氧化对高浊度水也有较好的助凝作用.原水的温度、pH值对其助凝效果影响较小,水中锰离子的存在有一定的助凝效果.

This paper studies the ferrate pre-oxidation positive function at the process of coagulation. The experimental result shows that when ferrate is 1mg/L,the coagulating effect can be seen, when 2mg/L,water turbidity decreased by 76%. Compared with using aluminum sulfate, water turbidity decreases by 20%～25%. And ferrate pre-oxidation has better coagulating effect to high water turbidity . The temperature & pH of original water have less effect in coagulation. The existence of manganese ions in water can improve its coagulating effect.