Fabrication of electrospun polyamide–weathered basalt nano-composite as a non-conventional membrane for basic and acid dye removal

Abstract

In this study, an adsorptive electrospun polyamide membrane (ESPA) and electrospun polyamide–weathered basalt composite membrane (ESPA-WB) were prepared by an electrospinning process at room temperature. Hence, the WB structure was built as a polymeric membrane separation film in combination with the ESPA matrix as a composite nano-filtration membrane. Then, the ESPA and ESPA-WB membranes were characterized using BET surface area analysis, Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy (SEM). To avoid cracks forming during the sintering process, the WB should be added in certain percentages. The microstructures of the prepared membranes were investigated to evaluate their efficiency for basic and acidic dyesʼ removal and their permeation flux. Compared with the ESPA, the ESPA-WB membrane combines the characteristics of WB and ESPA, which greatly enhances the performance of both methylene blue (MB) and methyl orange (MO) dyes removal from synthetic wastewater. The outcomes of this study indicated that the dye uptake in the case of ESPA-WB is higher than that of ESPA, and it decreases with an increase in dye concentrations. The obtained membrane ESPA-WB showed both an excellent anti-dye fouling and a good rejection property for both dyes (i.e. 90% rejection for MB and 74% for MO) with no sign of contamination by the applied dyes. It was found that the structure of the ESPA-WB membrane contains a large number of several adsorption sites which leads to an increase in the removal rate of dyes. Hence, this study demonstrated a non-conventional strategy to prepare an effective adsorptive nano-composite membrane that can be applied as a highly recyclable one for the removal of organic dyes. Graphic abstract

Phenol-Formaldehyde/Pyrazole Composite: Synthesis, Characterization, and Evaluation of its Chromate Removal Efficiency

“…Wastewater containing Cr(VI) and other metal ions has been subject to various treatments, such as carbon treatment, 7 filtration by membrane, 8 chemical precipitation, 9 ion exchange, 10 and adsorption. 11 Regarding Cr(VI) removal, 12 low cost, 13 absence of secondary contamination, 14 and adaptability of operation, adsorption is considered the best alternative technique for eliminating Cr(VI).…”

Dyeing of Recycled Electrospun Polyamide 6 Nanofibers: Implications of Dye Particle Size

“…Polyamides are semi-crystalline materials with excellent chemical resistance and outstanding mechanical and thermal characteristics [38]. Due to the mass production of polyamides, enormous amounts of their waste are produced annually by textile factories, causing severe environmental problems [39].…”

“…Due to the mass production of polyamides, enormous amounts of their waste are produced annually by textile factories, causing severe environmental problems [39]. Electrospinning offers the opportunity to recycle polyamide wastes to fabricate NWNF based on nanofiber (PA-NWNF) [38,39]. Disperse dyes are one of the dyes utilized for dyeing polyamides [31].…”

Potential Application of Innovative Aspergillus terreus/ Sodium Alginate Composite Beads as Eco-Friendly and Sustainable Adsorbents for Alizarin Red S Dye: Isotherms and Kinetics Models

“…Therefore, it is crucial to discover an economical and environmentally suitable treatment procedure before releasing it into the environment. For dye remediation, numerous physicochemical methods, including activated carbon, electro-oxidation, chemical oxidation, photolysis, flocculation, and bioremediation, can be used [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Bioremediation can be applied using microorganisms such as algae, bacteria, and fungi [ 17 ].…”