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《Environmental Science》 2007-01
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Study on the Enhanced Flocculation of the Natural Humus by Polydiallyldimethylammonium Chloride

TIAN Bing-hui,GE Xiao-peng,PAN Gang,LUAN Zhao-kun(State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)  
Enhanced flocculation of natural dissolve humus by polydiallyldimethylammonium chloride(PDADMAC) was studied and removal mechanism was discussed.The results show that using PDADMAC as the aid flocculants,the optimal flocculants dosage only was 40% of the tradition method.Removal of DOC and colour were increased to 60% and 90%.The results still show that anionic density of the humus has the more effect than its hydrophobic property on removal of humus by PDADMAC.Removal mechanism is "special adsorption action" in enhanced flocculation of humus by PDADMAC,namely,in the process of the hydrolysis flocculation of Poly(aluminium chloride)(PAC),cationic flocculants PDADMAC is adsorbed on the surface of the hydrolysate and increase the "adsorption electrostatic neutralization action" and "special adsorption action" of the hydrolysate,so that that removal of dissolve humus was obviously improved.
【Fund】: 国家高技术研究发展计划(863)项目(2002AA601011);; 国家重点基础研究发展规划(973)项目(2002CB412308)
【CateGory Index】: X703.5
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