The Coagulation Performance and Floe Properties of The Composite Coagulant During Surface Water Treatment
In this paper, polydimethyl diallylammonium chloridepolymeric 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=1). 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. Theflocs strength decreased as the shear rate increased.
Floe properties Composite coagulant Floes strength Humic acid
Yan-ning Wang Guang-ning Lu Zhen-hu Xiong Su-feng Tian
Department of Environmental and Municipal Engineering Tianjin Institute of Urban Construction Tianji Tianjin No. 24 Station of Technology Supervision & Inspection Tianjin Research Institute of Building
国际会议
三峡
英文
1188-1191
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）