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采用自制的聚硅酸铁锌(PFZSS)与壳聚糖(CTS)制备了新型复合絮凝剂PFZSS-CTS,并研究该絮凝剂对模拟直接大红染料废水的脱色效果.结果表明,适宜的絮凝条件为:投药量40 mg/L,pH=7,沉降时间30 min,快速、慢速搅拌转速分别为130、55 r/min,快速、慢速搅拌分别为时间2.5、15 min,此条件下染料的脱色率达到99.52％.结合ζ电位的分析,初步推断其絮凝机制包括电中和、吸附架桥、网捕卷扫.“,”A new type of compound flocculant PFZSS-CTS was prepared by laboratory made PFZSS and CTS.The results showed that the optimum flocculation conditions:dosage was 40 mg/L,pH=7,sedimentation time 30 min,raid stirring rate and slow stirring rate were 130,55 r/min,respectively,and raid stirring time and slow stirring time were 2.5,15 min,respectively.Under these conditions,the dye decolorization rate reached 99.52％.Through analyzed the zeata potential,the preliminary result indicated that the mechanism for flocculation mechanism included electrical neutralization,adsorption bridging,enmeshment and volume sweep.