A new type of flocculant composed of polysilic acid and Al30 （PSiAl30） was synthesized. Comparing with Alao and traditional PAC dominated by Al13, its performance on coagulation of humic kaoline suspension was studied. Results showed that the composites may exert both charge neutralization as Al30 and bridge absorption as polysilic acid. PSiAl30 is more adaptable for application in aquatic system with low alkalinity since it less affects pH of suspension. PSiAl30 with Si/AI molar ratio of 0.05 is optimal in coagulation for the highest TOC removal, lowest dosage and improving the removal of non-aroma matters in humic acid significantly.
修改评论