Abstract
Achieving the desired standard of drinking water quality has been one of the concerns across water treatment plants in the developing countries. Processes such as grid chamber, coagulation, sedimentation, clarification, filtration, and disinfection are typically used in water purification plants. Among these methods, unit filtration which employs polymers is one of the new technologies. There have been many studies about the use of semiconductive TiO2with graphene oxide (GO) on the base of different polymeric membranes for the removal of azo dyes, especially methylene blue (MB). Polymeric GO-TiO2membranes have high photocatalytic, antifouling property and permeate the flux removal of organic pollutants. The aim of this study was to investigate the characteristics of different polymeric membranes such as anionic perfluorinated polymer (Nafion), cellulose acetate, polycarbonate (PC), polysulfone fluoride (PSF), and polyvinylidene fluoride (PVDF). The result of this study showed that the GO-TiO2membrane can be used in the field of water treatment and will be used for the removal of polycyclic aromatic hydrocarbons (PAHs) from wastewater.
Highlights
With the development of heavy industries in recent decades, obtaining healthy drinking water has become a global concern [1]
Orthorhombic a = 9.184 b = 5.447 c = 5.154 pbca results of this study showed that propyline impregnated on the surface of TiO2 improved the photocatalytic properties compared to bare TiO2 [35]
Graphene oxide has a number of covalent attached oxygen containing groups such as epoxy, carbonyl, and carboxyl
Summary
With the development of heavy industries in recent decades, obtaining healthy drinking water has become a global concern [1]. The GO-TiO2 nanocomposite, under UV radiation and visible light, has the capability of photocatalytic degradation, high absorption capacity, and the capability of being more exposed to water pollutants as a result of its huge surface area of 2360 m2/gr [32]. The use of TiO2 nanomaterials as a photocatalyst for the removal of pollutants has attracted much attention due to its physical and chemical properties, high efficiency, low cost, and low toxicity. The degradation of azo dye, especially methylene blue, by TiO2 film, depends on the surface of the photocatalyst This film could be either in anatase crystal form, having different thicknesses and surfaces, or in low pressure and chemical deposition, from which vapor is produced [66]. The anionic dyes have strong adsorption in acidic pH while the cationic dyes have weak adsorption in alkaline pH [70, 71]
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