聚合氯化铝-聚丙烯酰胺处理含氟废水研究

Experimental Study on Effects of Polymerized Aluminum Chloride⁃Polyacrylamide on Treatment of Fluoride⁃Containing Industrial Wastewater

使用聚合氯化铝(PAC)-聚丙烯酰胺(PAM)联合处理含氟废水,考察了PAC投加量、PAM浓度、pH值、反应时间以及搅拌速度对除氟效果的影响。结果表明,在PAC投加量4400 mg/L、PAM浓度1 mg/L、溶液pH值7.0、反应时间20 min、搅拌速度300 r/min时,氟去除率达97.98%,除氟后溶液中氟离子残余浓度为0.81 mg/L。溶液中杂质离子的存在会降低PAC的除氟性能。

Fluoride-containing industrial wastewater was treated by using a composite coagulant of polymerized aluminum chloride(PAC)and polyacrylamide(PAM),and effects of PAC dosage,PAM concentration,pH value,reaction time and stirring speed on fluoride removal efficiency were explored.The results show that by adding 4400 mg/L PAC,with PAM concentration of 1 mg/L,solution with pH of 7.0,reaction time of 20 min and stirring speed of 300 r/min,the fluoride removal rate can reach 97.98%,leading to the residual concentration of fluoride ion at only 0.81 mg/L.However,the presence of impurity ions can reduce the fluoride removal rate by PAC.