Resource Preparation of Poly-silicic-ferric Coagulant from Fly Ash Extract:Characteristics, Simultaneous Removal Efficiency
A poly-silicic-ferric coagulant was prepared using fly ash extract as main raw material,and was characterized by Scanning Electron Microscopy (SEM),Infrared Spectroscopy (IR) and X-ray Dif-fraction (XRD).Simultaneous removal efficiency during coagulation process in treating simulated lead wastewater by poly-silicic-ferric coagulant was investigated compared to that by Poly ferric phosphate sulfate (PFPS).The results indicated that poly-silicic-ferric coagulant has better coagulation performance than PFPS: poly-silicic-ferric coagulant gave the greatest Pb2+ and color removal of 90% and 90% over the whole dosage range,respectively,in comparison with 70% and 80% by PFPS.Poly-silicic-ferric coagulant has greater capability of destabilization for pollutants than PFPS.The amount of positive charge carried by the hydrolysis products of poly-silicic-ferric coagulant was more than that of PFPS.Pb2+ removal mechanism by poly-silicic-ferric coagulant was a comprehensive action of coagulation and chemical reaction.
fly ash extract coagulant floes coagulation process
Juan Tan Yanzhen Yu Yuxing Zhou Lei Cheng
School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
国际会议
2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)
青岛
英文
100-104
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）