氯化钙去除铝工业废水中低浓度氟离子的研究

Study on Removal of Low Concentrations of Fluoride Ions with Calcium Chloride in Aluminum Industry

文章对铝工业废水中的氟离子采用氯化钙除氟方案,通过对反应时间、氯化钙添加量、搅拌强度等影响因素进行控制,得出将废水中氟离子浓度降低到1 mg/L以下的实验参数为搅拌强度100转/分钟,氯化钙添加量过量50%,反应时间20分钟,添加氯化钙后的pH在11.33左右。

In the paper, aluminum fluoride ions in industrial wastewater using calcium fluoride solution, through the reaction time, the amount of calcium chloride added, stirring intensity and other factors controlled, derived fluoride concentration in the wastewater is reduced to 1 mg/L the following experimental parameters for the stirring intensity of 100 revolutions/min, 50 % excess amount of calcium chloride added, and the reaction time 20 minutes after adding calcium chloride at a pH of about 11.33.