High flux and efficient Dyes removal from water by PVDF/ Graphene Oxide nanocomposite membranes
Paper ID : 1089-ICNS
Authors:
Mehran Khansanami1, Ali Esfandiar *1, Hamidreza Ghanbari2
1Department of physics, Sharif University of Technology, Tehran,Iran.
2Sharif university of technology
Abstract:
Polymer based membranes are as conventional membranes science, and one of the most popular polymers is Poly Viyniliden Fluoride (PVDF) that used commonly in Microfiltration and Ultrafiltration water treatment methods. The PVDF has chemicals stability, desirable mechanical and thermal properties as well as hydrophobic nature. Due to its hydrophobicity, water flux is very low (< 90 Lit/m2h) along with quick fouling. Here, to sort these problems out, we used graphene oxide (GO) sheets which has two dimensional structures and hydrophilic oxygen functional groups at the edges with negative surface electrostatic charge. The PVDF/GO (PGO) nanocomposite membranes made by phase inversion - immersion precipitation method present high water flux (450 Lit/m2h) and close to complete dyes rejection because of electrostatic interactions between cationic and anionic dyes with oxygen functional groups of the membranes. In continue, we explained the adsorption mechanism of the dyes by considering charges of the dye molecules and membrane functional groups.
Keywords:
Water treatment, PVDF/GO composite membrane, molecular separation, electrostatic interaction, Hill isotherm adsorption.
Status : Abstract Accepted (Oral Presentation)