Polyvinylidene fluoride nanocomposite super hydrophilic membrane integrated with Polyaniline-Graphene oxide nano fillers for treatment of textile effluents

Abstract

Water pollution from the fashion industries containing dyes has become a major source of water pollution. These anthropogenic contaminated waters directly enter irrigation and drinking water systems, causing irreversible environmental damage to human health. Nanomembrane technology has attracted extensive attention to remove these toxic chemicals but new approaches are still required for improving removal efficiency and control the channel size. The work deals with the fabrication of a novel hybrid polyvinylidene fluoride (PVDF)-polyaniline (PANI) membrane with graphene oxide (GO). Incorporation of PANI-GO as a nanofiller has significantly improved antifouling properties and a solvent content of the fabricated membrane. Besides, pure water flux also increases from 112 to 454mLm -2 h -1 indicating the hydrophilic nature of the nanocomposite membrane. Among various compositions, the nanocomposites membrane with 0.1%w/v GO demonstrated a maximum of 98% dye rejection at 0.1MPa operating pressure. After multiple testing of the membrane, the flux recovery ratio reached about 94% and dyes rejection improved with the addition of PANI-GO. The removal efficiency of the composite membrane for Allura red is 98% and for methyl orange is 95%. Based on the above results the PVDF/PANI/GO membranes are recommended for practical use in wastewater treatment, particularly for anionic dyes removal from textile effluents.

Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods

“…Synthesizing of new, efficient, nature-based, or waste-originating adsorbents, kinetic, equilibrium and thermodynamic studies on biosorption [42][43][44][45][46] Coagulation/flocculation Synthesizing of new, efficient, nature-based, or waste-originating coagulants and acceleration of sedimentation by magnetic field [47][48][49][50][51][52] Electro-coagulation Ultra-sound assistance, nanofilms on cathodes and solar power usage [53][54][55][56][57][58] Electrochemical oxidation Air-diffusion cathodes, new materials and coatings of electrodes, membrane anode and electro-peroxone process [59][60][61][62][63][64] Membrane filtration Novel membrane materials, with addition of graphene, stabilization of membranes by biomacromolecules [65][66][67][68][69][70] Ozonation Catalyst addition, enhancement by ultrasound and hydrodynamic cavitation [71][72][73][74][75] O 3 /UV Photocatalytic membranes [76] O 3 /H 2 O 2 Proposal of the degradation mechanism, enhancement by electrolysis, heterogenous catalyst addition [77][78][79] UV/H 2 O 2…”

Evaluating Antibacterial Efficacy and Biocompatibility of PAN Nanofibers Loaded with Diclofenac Sodium Salt

“…Besides, their porous structure, ability to absorb wound exudates, high specific surface area, and structure similarity to the natural extracellular matrix (ECM) nanofibers are widely used for tissue regeneration, wound dressing, and drug delivery system [12][13][14]. Electrospun nanofibers have found their applications in numerous fields such as wound healing [15], antibacterial [16,17], sensors [18], filtration [19], and other environmental application. Various delivery systems based on (natural & synthetic) polymers, liposomes, inorganic nanoparticles, etc., are generally used for wound dressing.…”

Interpenetrating network nanoarchitectonics of antifouling poly(vinylidene fluoride) membranes for oil–water separation

“…1,2 The efficient and pollution-free separation of oily wastewater is a widely recognized strategy for sustainable development. 3 Compared with traditional separation methods, such as oxidation, biological, and chemical occulation methods, membrane ltration separation technology has the advantages of simple operation, no phase change, larger separation coefficient, energy saving, high efficiency, excellent economic benets, and no secondary pollution. [4][5][6] It is an effective way to solve the problem of oily wastewater.…”