Preparation and Characterization of Matrix Hybrid Membranes Polyvinylidene Fluoride/Polyvinylpyrrolidone/Silica Gel/Zinc Oxide for Cr(VI) Removal from Water

Autor:	Chikh Melkaoui, Sihem Zahia Belalia, Benamar Dahmani, Mustapha Chabane
Rok vydání:	2020
Předmět:	Polyvinylpyrrolidone Silica gel chemistry.chemical_element Zinc Polyvinylidene fluoride Characterization (materials science) Matrix (chemical analysis) chemistry.chemical_compound Membrane chemistry Chemical engineering Materials Chemistry medicine medicine.drug
Zdroj:	Annales de Chimie - Science des Matériaux. 44:311-318
ISSN:	1958-5934 0151-9107
DOI:	10.18280/acsm.440502
Popis:	Matrix hybrid membranes, based on polyvinylidene fluoride (PVDF), poly (N-vinylpyrrolidone) (PVP), silica gel (SG) and zinc oxide (ZnO) were synthesized by phase inversion via immersion precipitation method. The characterization of membrane samples was performed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), optical microscopy, contact angle, porosity, mean pore size and water permeability measurements. The FTIR analysis showed the appearance of new bands attributed to the functional groups of SG and ZnO. The XRD analysis confirmed a modification in the structure of membranes. The prepared membranes were used for the removal of hexavalent chromium (Cr(VI)) from aqueous solution. Membrane filtration experiments show that the water permeability and Cr(VI) rejection ratios increase with increasing the weight ratio ZnO (%)/SG (%). The maximum values of the Cr(VI) rejection rate and water permeability were respectively 85% and 685 L/m2hbar for weight ratios (0.75% of ZnO/0.25% of SG).
Databáze:	OpenAIRE
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