改性植物单宁对铜绿微囊藻的去除效果与机理EI北大核心CSCD

研究了改性植物单宁(Tanfloc)絮凝对铜绿微囊藻的去除效果、影响因素及机理。10 mg/L的Tanfloc投加量下,10 min内即可获得94%的高去除率,而当投加量进一步增加时,去除率反而略有下降。Tanfloc具有较宽的初始pH值适用范围,在酸性条件下和弱碱性条件下(pH值不大于9.0),藻去除率均超过90%;而在强碱性条件下(pH值不小于10.0),藻去除率逐渐下降。Tanfloc在高藻细胞密度(大于4.87×10^(9)个/L)下可以获得大于95%的高除藻效果。水体pH值会影响除藻机理,pH值为5.5、8.0和9.5时,电中和、静电簇和架桥作用分别是除藻的主要影响因素。

Removal effect and mechanism of modified tannin on Microcystis aeruginosa

The effect, influencing factors and mechanism of modified tannin(Tanfloc)flocculation to remove Microcystis aeruginosa were studied. At the dosage of 10 mg/L Tanfloc, a high algae removal rate of 94% can be obtained within 10 minutes, but when the dosage is further increased, the removal rate decreases slightly. Tanfloc has a wide application range of initial pH value. Under acidic and weakly alkaline conditions(pH value not greater than 9. 0), the algae removal rate exceeds 90%. Under strong alkaline conditions(pH value is not less than 10. 0), the algae removal efficiency decreases gradually. Tanfloc in high algal cell density(greater than 4. 87×10⁹ cell/L)can obtain a high algae removal rate more than 95%. The pH value of water will affect the algae removal mechanism. When the pH values are 5. 5, 8. 0 and 9. 5 respectively, electric neutralization, electrostatic cluster and bridging effect are the main influencing factors of algae removal.