中文摘要：

制备了一种新型的复合聚硅铝三十（PSiAl30）类絮凝剂，与常规聚合氯化铝PAC（以Al13为主）和Al30絮凝剂作对比，通过烧杯混凝实验，考察了其对腐殖酸一高岭土悬浊液的混凝效果。结果表明，复合硅的PSiAl30系列既有Al30的电中和能力，又起吸附架桥作用。PSiAl30圳絮凝剂对水体酸碱度影响小，可适用于低碱度水体。弱碱性范围内，硅，铝比为0．05的PSiAl30有最高的TOC去除率，最低的投药量，并能显著提高对非芳烃类的去除能力。

英文摘要：

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.