An enhanced coagulation using ferric chloride and poly-ferric chloride coagulant assisted by polyamidine:Performance and mechanisms  

作　　者：Bo Guo Sen Zhang Xing Xu Baoyu Gao Qian Li Qinyan Yue 

机构地区：[1]Shandong Institute of Metrology,Ji'nan 250014,China [2]Shandong Key Laboratory of Water Plution Control and Resource Reuse,School of Environmental Science and Engineering,Shandong University,Ji'nan 250100,China

出　　处：《Chinese Chemical Letters》2023年第12期300-304,共5页中国化学快报（英文版）

基　　金：financially supported by Taishan Scholar Foundation,China(No.ts201511003);Major Technological Innovation Engineering Project of Shandong Province,China(No.2020CXGC011204).

摘　　要：The deterioration of water caused by industrial production is a thorny problem.Solving the problem cogently through innovative coagulationstrategies has been recognized of important practical significance.In this work,a simple enhanced coagulation by using ferric chloride(FC)and poly-ferric chloride(PFC)coupled with polyamidine(PA)were tried to remove the toxic organics.The results shown that PA addition could obviously enhance coagulation performances of the iron-based coagulants.The synergic coagulation process and mechanism were studied and discussed in detail based on the coagulation behaviors,flocs properties,removal eficiency and zeta potentials.FC and PFC remove organics mainly through charge neutralization and adsorption-bridging,resulting in a good purification performance.While PA with a higher charge density showed better purification performance due to enhanced charge neutralization.It is worth mentioning that the addition of PA could make the coagulants adapt to a wider pH range,and remove the toxic organics more effectively.That is to say,the practical adaptability of the coagulant was enhanced.This work thus provides a simple strategy to effectively purify wastewater and further improve the water safety.

关 键 词：Coagulation erformance Polyamidine Ferric hloride Poly-ferric chloride 

分 类 号：X703[环境科学与工程—环境工程] TQ085.412[化学工程]