中文摘要：

在实验室内对使用纳米四氧化三铁（Fe3O4）和纳米γ-三氧化二铁（γ-Fe2O3）作为聚合氯化铝（PACl）的助凝剂去除水体中铜绿微囊藻的效果进行了研究。结果表明,以纳米Fe3O4或纳米γ-Fe2O3为助凝剂,能够降低PACl的投加量,提高沉降速率,进而缩短沉降时间,且对铜绿微囊藻的去除效果明显优于单独使用PACl。在藻浓度为106个/m L的条件下,为了达到相同的除藻效果,单独使用PACl的投量要比同时投加纳米Fe3O4或纳米γ-Fe2O3时多出1倍左右;在不加磁场条件下,要达到同样的处理效果,用纳米Fe3O4或纳米γ-Fe2O3做助凝剂比单独投加PACl节约一半以上的时间;而在加磁场的条件下,用纳米Fe3O4或纳米γ-Fe2O3做助凝剂甚至只需要10 min就能达到比单独投加PACl沉降60 min更高的处理效率。该方法对不同浓度级的铜绿微囊藻都有较好的去除效果,具有一定的实际应用价值。

英文摘要：

This study investigated the removal efficiency of algae using nano Fe3O4 or nano γ-Fe2O3 as composite coagulant with polyaluminium chloride. The removal efficiency of this method is superior to using PACl only. The dosage of PACl with this method is less than traditional ways. At the algae concentration of 106 cell/m L,the PACl dosage of this method is half of the dosage of using PACl only to achieve the same effect,and the settling time can be saved more than a half without magnetic field. The time of settling with magnetic field is only10 minutes with this method to enhance a better efficiency. In the meantime,the method was applied to different concentrations of algae and good results were obtained.