摘要
铝盐混凝沉淀法是农村地区高氟水除氟最为经济和常用的方法之一,但其易导致除氟出水铝含量增加。以聚合氯化铝铁(PAFC)、聚合氯化铝(PAC)、氯化铝(AlCl_3)为絮凝剂,通过试验对比不同条件下的除氟降铝效果。结果表明:PAFC的除氟降铝效果优于其他两种混凝剂,且适应的pH范围宽,对低温水的处理效果好;在相同的水质条件下,向F^-浓度为4mg/L的试验用水中加入5%的PAFC水溶液9.0 mL,即可使氟、铝含量达标,效果优于其他两种混凝剂。另外还通过正交试验确定了絮凝的最佳工艺参数。
The coagulation-sedimentation process by use of Al-based coagulants is one of the most effective and common methods applied in rural areas for removal of fluorine from high fluoride-containing groundwater,despite it may increase the residual aluminum of the effluent. Fluorine removal and residual aluminum under different conditions by three flocculants,namely,polyaluminum ferric chloride（ PAFC）,polymeric aluminum chloride（ PAC） and aluminum chloride（ AlCl_3）,are compared. The results show that performance of PAFC is better than that of the other two coagulants,with adaptiveness to a wide pH range and ideal treatment efficiency under low temperature. Under identical condition,addition of 9. 0 mL PAFC solution（ 5%） to the test water containing F^-of 4 mg/L made both fluorine and residual Al in the effluent lower than the limited values stipulated by GB 5749—2006,making PAFC of better effect than the other two coagulants. Additionally,the optimum parameters for flocculation process is obtained by orthogonal test.
作者
董润坚
李健
胡浩
刘枫
李佳
罗罡
Dong Runjian;Li Jian;Hu Hao;Liu Feng;Li Jia;Luo Gang(Jilin Academy of Agricultural Mechanization Sciences,Changchun 130022,China)
出处
《净水技术》
CAS
2018年第6期49-53,67,共6页
Water Purification Technology
基金
吉林省科技发展计划项目(20150204022SF)
关键词
高氟地下水
混凝
除氟
剩余铝
试验
high fluoride-containing
groundwater coagulation
defluoridation residual
aluminum experiment
