Evaluation the effect of CdSe and ZnSe nanoparticles on polysulfone membrane for humic acid Separation from synthetic wastewater
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1Department of Chemical Engineering, College of Engineering, University of Isfahan, P.O. Box 81746-73441, Isfahan, Iran
2Department of Chemistry, Isfahan University of Technology, Isfahan, Iran
Humic acid (HA) is typical refractory components of Natural Organic Matter (NOM), which leads to the formation of disinfection by products, so it is necessary to separate from water flow. In this study, nanocomposite membranes was prepared for separating of humic acid from synthetic wastewater. Ultrafiltration polysulfone membrane was fabricated by phase inversion technique then ZnSe and ZnSe/CdSe nanoparticles were doposited on the membrane surface by photo polymerization method. Results showed that the presence of Znse and ZnSe/CdSe nanoparticles increased the contact angle by 53% and 45% that represents nanoparticles are hydrophobic. Also ZnSe and ZnSe/CdSe coated membranes have about 1 and 11% more porosity than raw membrane. Moreover, the presence of Znse and ZnSe/CdSe nanoparticles provide more pore number and lower torthuosity than raw membrane. Aforementioned proprties results a flux enhancemnet from 55.75 for raw membrae to 65.44 and 58.25 L/m2.h for Znse and ZnSe/CdSe coated membrane, respectively. On the other hand, decreased pore size of nanocomposite membranes provided increased rejection by 30% and 10% for Znse and ZnSe/CdSe coated membrane compared to raw membrane.