锌铝电极电絮凝法处理高氟饮用水的研究

在双铝极板电絮凝法的基础上引入锌电极,考察锌铝电极电絮凝法对高氟饮用水的除氟效果.静态试验结果表明,采用锌铝电极可以有效降低水中的氟离子浓度,对CODMn和浊度的去除效果优于双铝电极;当原水的氟离子浓度为6 mg/L时,最佳处理条件:锌、铝极板比为1:3、电解电压为18 V、反应pH值为6、反应时间为25～30 min.动态试验结果表明,当进水流量和氟离子浓度分别高达42 mL/min、8 ms/L时,调节进水pH值为6可使其出水中的氟离子浓度达标.

Electroflocculation Process with Zinc-aluminum Electrode for Treatment of High-fluoride Drinking Water

On the basis of the dual-aluminum electrode, the zinc-aluminum electrode was designed by introducing zinc electrode. The removal efficiency of fluoride from high-fluoride drinking water by the electroflocculation process with zinc-aluminum electrode was investigated. The results show that the zinc-aluminum electrode can effectively reduce the fluoride ion concentration, and the removal efficiency of CODMn and turbidity is superior to the dual-aluminum electrode. When the raw water fluoride ion concen-tration is 6 mg/L, the optimal treatment conditions are zinc-aluminum electrode ratio of 1 : 3, electrolysis voltage of 18 V, pH of 6 and reaction time of 25 to 30 min. When the inflow rate and fluoride ion con-centration are 42 mL/min and 8 mg/L, controlling the inflow pH at 6 can make the effluent fluoride ion concentration reach the standard.