Coagulation Performance and Floe Properties of the Composite Coagulant During Surface Water Treatment
Polydimethyl diallylammonium chloride-polymeric ferric aluminum was synthesized by combing polydimethyl diallylammonium chloride (PDM) with polymeric ferric aluminum chloride (PFAC) with determined molecular weight ratio (Aluminum to PDMDAAC,Wr=l).Flocculating mechanisms and performance of the new composite coagulant were studied in treating surface water.The growth,breakage and regrowth of floes during coagulation were measured under optimal dosage and neutral conditions.Different shear forces were investigated to evaluate the floes strength.The results indicated that the new composite coagulant exhibited better coagulation performance than PFAC for removing turbidity and dissolved organic matter.For the composite coagulant,the predominant coagulation mechanisms were bridge formation and charge neutralization.The floes strength decreased as the shear rate increased.
Floe properties Composite coagulant Floes strength Humic acid
Wang Yanning Lu Guangning
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engi Tianjin Research Institute of Building Science, Tianjin 300193, PR China
国际会议
2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)
青岛
英文
148-151
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）