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：Lei Wang Junlian Qiao Yinghui Hu Lei Wang Long Zhang Qiaoli Zhou Naiyun Gao 

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.