提高膨润土絮凝沉降铜绿微囊藻能力的研究

Research on the Improvement of the Capability of Bentonite to Flocculate and Remove Microcystis Aeruginosa

研究了2种提高膨润土絮凝去除铜绿微囊藻效果的方法———在膨润土中引入聚合氯化铝(PAC)及利用壳聚糖将膨润土进行改性处理。实验结果表明,这2种方法均在投加量较低时就能产生明显的去除效果,而相同用量的膨润土则几乎没有去处能力。当膨润土投加量为40 mg/L,PAC投加量为10 mg/L时,两者复合除藻效果最好,藻悬液的浊度和叶绿素a去除率分别达到93.8%和95.1%;当壳聚糖改性膨润土的投加量为32 mg/L时,相应的浊度和叶绿素a去除率分别达到90.3%和93.7%。

Two methods improving the capabilily of bentonite of flocculating and removing algal ceils of microcystis aemginoss are studied in this paper. Bentonite compounded with polymeric aluminum chloride（PAC） or modified with chitosan both has ebviom removal effect at a low dosage, while the pure bentonite almost has no effect at the stone doeade. The removel rates of turbidity and ctdomphyll- a can reach 93.8% and 95.1% respectively and it is the best where the bentonite and PAC dosage is 40 mg/L and 10 mg/L respectively; end the removal rates of turbicllty and chlorophyll - a can reach 90.3% and 93.7% respecfively when chitossn - modified bentmite of 32 mg/L is added.