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Analysis on function of several types polysilicate aluminum ferric

ZHAO Hui-ming1,LUO Gu-yuan2,JI Tie-jun2(a.College of Chemistry and Chemical Engineering;b.Faculty of Urban Construction and Environmental Engineering,Chongqing University,Chongqing 400030,P.R.China)  
Polysilicate metal salt exhibits excellent flocculation ability.Polysilicate aluminum ferric(PSAF) was prepared through copolymerization by sulphates and chlorides of aluminum or iron with polysilicate acid.The optimal hydrolysis parameter of different PSAFs was determined.Differences in turbidity and flocculation function of four types of PSAFs were evaluated.Furthermore,differences in coagulation and phosphorus removal were analyzed and discussed.
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