紫外光预氧化下高岭土复合聚合氯化铝混凝去除水体中颤藻

采用紫外光预氧化复合高岭土,通过混凝去除给水中的颤藻。结果表明,紫外光的预氧化可破坏藻细胞的结构,抑制其生长。最佳复配条件:紫外光照射时间4 min,高岭土投加量45 mg.L-1,PAC投加量4.5 mg.L-1,静置沉淀时间20 min。在此条件下,浊度和叶绿素a去除率分别达到91.2%和94.6%,残留铝含量为0.13 mg.L-1。

Coagulation Removal of Oscillatoria Tenuis in Water by Pre-oxidation of Ultraviolet Radiation Compounded with Kaolin

Removal of Oscillatoria tenuis by ultraviolet radiation pre-oxidation with Kaolin was studied.The results show that ultraviolet radiation pre-oxidation can destroy the cytoarchitecture of algae.As a result it restrains the growth of algae.The optimum coagulation condition is worked out as follows:4 min ultraviolet irradiation time,45 mg·L-1 Kaolin,4.5 mg·L-1 PAC with 20 min sedimentation time.Under these circumstances,the removal rates of turbidity and chlorophyll a reach 91.2% and 94.6% respectively,and the concentration of residual aluminum is 0.13 mg·L-1.