A new type of effective complex coagulant polysilicate aluminum ferric salt(PSAF) was prepared from coal gangue and pyrite slag and used as coagulant in the treatment of vegetable oil wastewater.

• 用煤矸石及硫铁矿烧渣作原料制备了一种高效复合混凝剂聚硅酸铝铁(PSAF),并将其用于植物油脂废水的处理。