中文摘要：

采用乙醇-丙酮混合沉淀法分离聚合氯化铝（PAC）溶液中的Alb形态.通过对吸光度和Zeta电位的测定,研究了Alb形态的投加量和溶液pH对分散黄棕和直接紫2种模拟染料废水脱色效果的影响,并将其与PAC进行比较.利用光散射颗粒分析仪（PDA2000）和Mastersizer2000型激光粒度仪在线测定絮体粒径的变化情况,结合絮体的Zeta电位,对Alb形态的絮凝机制进行探讨.结果表明,与PAC比较,Alb形态处理模拟染料废水的最佳pH值范围较宽,在实验条件下,Alb形态形成的絮体的密实性较高,沉降性能较好,恢复能力较强.

英文摘要：

Alb species was obtained from polyaluminum chloride（PAC） using ethanol-acetone mixed precipitation method.Alb and PAC were comparatively investigated in terms of color removal and zeta potential under different coagulant dosage and solution pH in the treatment of dispersive yellow and direct purple simulative dyeing wastewater.The changes of floc size of Alb and PAC were analyzed with PDA2000 and Mastersizer2000,and the coagulation mechanisms were also investigated.Compared with PAC,Alb species can work within a wider pH range and the flocs formed by Alb showed a more compact structure,a better settle ability and regrowth ability.