疏松型聚合氯化铝铁的合成与絮凝效果  

Synthesis and Flocculation of Loose Polyaluminum Ferric Chloride

作　　者：张智[1,2] 李淼 张超 陈树新 栗方星[3] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津市津水自来水配套有限责任公司,天津300112 [3]南开大学化学学院,天津300071

出　　处：《中国给水排水》2014年第17期66-69,共4页China Water & Wastewater

摘　　要：以聚合氯化铝、三氯化铁和疏松剂为原料,合成了疏松型聚合氯化铝铁。疏松剂离子的特征是半径大、带电荷少,当铝铁离子水解生成的絮状沉淀物吸附了这样的离子后,占据了较大的空间,同时对周围离子的吸引力小,从而使絮状物内部结构更为疏松;同时这样的离子与絮状物结合力小,容易被水中带电的颗粒所取代,不影响絮状物对水中悬浮颗粒的吸附。试验结果证明,加入这样的离子后,絮凝剂的絮凝效果得到较大幅度提高。The loose polyaluminum ferric chloride （PAFC） was synthesized with polyaluminum chloride, ferric chloride and bulking agent. Ions of the bulking agent were characterized by large radius and less charged. When flocculent precipitate from hydrolysis of aluminum and iron ions adsorbed such ions, they occupied large space and were less attractive to ions around, which made the internal structure of flocs looser. At the same time, the bonding force of such ions with flocs was low, and the ions could be easily replaced by the charged particles in water, without affecting the flocculent adsorption of the sus- pended particles. The results proved that adding such ions could effectively improve the flocculating effect of flocculant.

关 键 词：聚合氯化铝 三氯化铁 疏松剂 聚合氯化铝铁 

分 类 号：TQ314.253[化学工程—高聚物工业]