化学混凝沉淀法处理含氟废水研究
Study on the Treatment of Fluorine-containing Wastewater by Chemical Coagulation Sedimentation Method
李佳琪 1吴丽红 1兴虹 1唐馨悦 1袁润1
作者信息
- 1. 辽宁科技学院 生物医药与化学工程学院,辽宁 本溪117004
- 折叠
摘要
文章采用氯化钙、氯化钙-聚合氯化铝(PAC)处理氟离子浓度为95mg/L的废水,考察氯化钙投加量、PAC投加量对氟离子去除率的影响,出水浊度随沉淀时间的变化,进水pH对氯化钙-PAC除氟的影响.实验结果表明,氯化钙-PAC处理效果优于氯化钙单独处理效果,进水最佳pH值为7,最佳Ca/F(物质的量比)为0.9,PAC(10％)最佳投加量为每升水样6.0mL.在此条件下,出水残余氟离子浓度为8.6mg/L,出水浊度为2NTU,处理1吨水的药剂费为2.7元.
Abstract
Calcium chloride and calcium chloride-polyaluminium chloride (PAC) were used to treat wastewater with fluoride ion con-centration of 95 mg/L.The effects of calcium chloride and PAC amounts on the removal rate of fluoride ion,the change of effluent tur-bidity with sedimentation time,and the effect of influent pH on the removal of fluoride by calcium chloride-PAC were investigated.The experimental results showed that the treatment effect of calcium chloride-PAC is better than that of calcium chloride alone.The optimum pH of the influent is 7,the optimum Ca/F (amount of substance) is 0.9,and the optimum amount of PAC (10%) is 6.0 mL per liter of water sample.Under this condition,the residual fluoride ion concentration in the effluent is 8.6 mg/L,the turbidity of the effluent is 2 NTU,and the reagent cost for treating 1 ton of water is 2.7 RMB.
关键词
含氟废水/氯化钙/聚合氯化铝(PAC)Key words
Fluorine-containing wastewater/Calcium chloride/Polyaluminium chloride ( PAC)引用本文复制引用
基金项目
辽宁科技学院2024年校级大创项目(202411430039)
出版年
2024
NETL
NSTL
万方数据