【摘要】 采用复合高铁酸盐处理含铜绿微囊藻原水,考察了其除藻的影响因素和对原水的净化效果,同时考察了其与聚合氯化铝(PAC)的联用效果及除藻机理。结果表明,原水pH值和复合高铁酸盐的氧化时间均对铜绿微囊藻的去除具有明显影响,最佳pH值为5~6、最佳氧化时间为15 min;在一定范围内增加复合高铁酸盐的投量可明显提高除藻效果。另外,复合高铁酸盐预氧化可降低TP浓度,但由于藻细胞的破裂,TN和UV254值会升高。当复合高铁酸盐与PAC联用时,两者对除藻及去除TP和UV254具有协同效果。复合高铁酸盐的除藻机理为直接破坏铜绿微囊藻的细胞壁,使胞内物质流出从而导致藻细胞死亡。更多还原

【Abstract】 Composite ferrate was used to treat raw water containing Microcystis aeruginosa.The influencing factors of algae removal,the purification efficiency of raw water,the combined efficiency with PAC and the mechanism of algae removal were investigated.The results show that the pH value of raw water and the oxidation time of composite ferrate have significant effect on removal of Microcystis aeruginosa.The optimal pH value and oxidation time are 5 to 6 and 15 minutes respectively.The removal efficiency of algae can be significantly improved by increasing composite ferrate dosage to some extent.During the preoxidation with composite ferrate,the concentration of TP is decreased while the concentrations of TN and UV254 are increased due to algal cell disruption.The combination of composite ferrate and PAC has a synergistic effect on removal of algae,total nitrogen and UV254.The mechanism of algae removal by composite ferrate is to directly break cell wall of Microcystis aeruginosa to release intracellular components,thus causing algal cell death.更多还原