The new technic for removal anionic dye from water with negative surface electrostatic charge by polymeric membrane

Poly Vinylidene Fluoride (PVDF) polymer is one of the commonly polymeric materials that abundant used in Ultrafiltration and Microfiltration process in water treatment technology for separation particles with 0.1-10 μm. But PVDF membrane because of its 18nm mean pore size with negative surface charge, can’t separate anionic nanometer molecules in under 2nm size. However, the PVDF/GO functional membranes with more negative surface electrostatic charge toward neat PVDF membrane, and adding cationic molecules to the anionic dye solution can remove this anionic dye from water with high efficiency during filtration process.

Keywords:

separation , PVDF/GO composite polymeric membrane , electrostatic interaction.