Pre-oxidation with KMnO4 changes extra-cellular organic matter's secretion characteristics to improve algal removal by coagulation with a low dosage of polyaluminium chloride
Pre-oxidation with KMnO4 changes extra-cellular organic matter's secretion characteristics to improve algal removal by coagulation with a low dosage of polyaluminium chloride作者机构:College of Environmental Science and EngineeringState Key Laboratory of Pollution Control and Resource ReuseTongji University
出 版 物:《Journal of Environmental Sciences》 (环境科学学报(英文版))
年 卷 期:2013年第25卷第3期
页 面:452-459页
核心收录:
学科分类:083002[工学-环境工程] 0830[工学-环境科学与工程(可授工学、理学、农学学位)] 08[工学]
基 金:supported by the Major National Science and Technology Projects(No.2008ZX07421-002) the National Natural Science Fund Projects(No.21177093)
主 题:KMnO4 Microcystis aeruginosa strength coagulation
摘 要:Microcystis aeruginosa was used to study the effect of KMnO4 pre-oxidation on algal removal through coagulation with polyaluminium chloride (PAC).KMnO4 pre-oxidation improved the coagulation efficiency of algal at a low dosage of *** optimal KMnO4 feeding period was in the stationary growth phase of Microcystis ***4 traumatized the algal cells and stimulated cellular release of organic matter,contributing to the pool of extra-cellular organic matter (EOM).KMnO4 also decomposed EOM,especially small molecular weight *** concentrations of KMnO4,such as 2 mg/L,induced algae cells to produce moderate amounts of new EOM with molecular weights of 11,280,and 1500 *** relatively large molecules combined easily with PAC,promoting coagulation and removal of *** concentrations of KMnO4 lysed algae cells and produced much high-molecular-weight EOM that did not enhance flocculation by PAC at lower dosages.