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Synthesis of a novel magnetic polyacrylamide coagulant and its application in wastewater purification
Zheng Zhou1, Aiqin Shan2, Yuxia Zhao3
1School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu Province 221116, China E-mail: klsaq2003@163.com; School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang, Jiangsu Province 222005, China.
Abstract:
In this study, a novel magnetic polyacrylamide (PAM) coagulant based on the core of magnetite (Fe3O4), with oleic acid serving as modifier and acrylamide as monomer, was synthesized to remove suspended solids in kaolin-suspended water. The composites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermo gravimetric analysis and scanning electron microscopy. The results demonstrated that 82.8% of turbidity removal rate was obtained in 5 min of static settling in simulated kaolin-suspended water. This proved to be superior to that of PAM and poly aluminum chloride. Also confirmed in this study was the fact that zeta potential was significantly correlated with turbidity removal.
