Poly-aluminum-silicate-chloride (PASiC)—a new type of composite inorganic polymer coagulant

摘要: Abstract A new inorganic polymer coagulant, poly-aluminum-silicate-chloride (PASiC), was prepared by two approaches: (1) hydroxylation of the mixture AlCl3 and fresh polysilicic acid in Al/Si ratios ≥5, (PASiCc); (2) hydroxylated poly-aluminum-chloride (PAC) combined with aged 2 h (PASiCm). The hydrolysis-polymerization process Al(III) PASiC solution examined pH titration method. performances comparison PAC were characterized various experimental methods. results have shown that there exist some interactions between aluminum species acid, especially at low basicity (B) value, which can play a part chemical structure, molecular weight distribution, electrokinetic characteristics coagulating properties PASiC. complexes formed when different charged are less positive charge but larger than corresponding hydrolysis products same value. Therefore, it is necessary to consider aggregating efficiency effectiveness developing coagulant. In general, has high coagulation effect, superior for both turbidity color removal.