Fly ash was modified by macromolecular flocculant PDMDAAC to improve its perfor-mance for pollutants removal,and the optimal parameters for the modification were investigated through orthogonal test.

• 为提高粉煤灰的除污能力,采用高分子絮凝剂PDMDAAC(聚二甲基二烯丙基氯化铵)对粉煤灰进行表面改性,并通过正交试验考察了改性的最佳工艺参数。